GB1427743A - Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighter - Google Patents
Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighterInfo
- Publication number
- GB1427743A GB1427743A GB4283875A GB4283875A GB1427743A GB 1427743 A GB1427743 A GB 1427743A GB 4283875 A GB4283875 A GB 4283875A GB 4283875 A GB4283875 A GB 4283875A GB 1427743 A GB1427743 A GB 1427743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- operative
- pulse
- stable
- voltage
- oscillator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 235000019504 cigarettes Nutrition 0.000 title abstract 2
- 239000002737 fuel gas Substances 0.000 title 1
- 230000007704 transition Effects 0.000 abstract 4
- 230000000977 initiatory effect Effects 0.000 abstract 2
- 230000004913 activation Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000000446 fuel Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q2/00—Lighters containing fuel, e.g. for cigarettes
- F23Q2/16—Lighters with gaseous fuel, e.g. the gas being stored in liquid phase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q2/00—Lighters containing fuel, e.g. for cigarettes
- F23Q2/28—Lighters characterised by electrical ignition of the fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q2/00—Lighters containing fuel, e.g. for cigarettes
- F23Q2/28—Lighters characterised by electrical ignition of the fuel
- F23Q2/285—Lighters characterised by electrical ignition of the fuel with spark ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/004—Using semiconductor elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3381—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement using a single commutation path
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3385—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
- H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Lighters Containing Fuel (AREA)
- Control Of Combustion (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
1427743 Ignition devices BICOSA-SOC DE RECHERCHES 22 Jan 1973 [25 Jan 1972 12 April 1972 7 July 1972 11 Dec 1972] Divided out of 1427741 42838/75 Heading F1B An electronic ignition device for igniting gas fuel, for example in a cigarette lighter, comprises a D.C. voltage source 4, voltage raising means connected to the source and to a spark gap 1, the voltage raising means including oscillator means connected to the source and operative for converting the D.C. voltage of the source into an oscillating voltage, switch means 5 having an activated and an unactivated condition, the switch means being operative upon activation for initiating operation of the oscillator means to cause the voltage raising means to generate a spark voltage across the gap and terminating means operative when the switch means remains in the activated condition for automatically terminating operation of the oscillator means upon elapse of a predetermined time interval following the initiation of operation of the oscillator means, the terminating means comprising pulse generating means 210 operative for generating a pulse upon elapse of a predetermined time interval and bistable means 200. The bi-stable means 200 is operative when in a first state for permitting operation of the oscillator means and operative when in a second state for preventing operation of the oscillator means. Means are provided which connect the switch means to the bi-stable means 200 for causing the bi-stable means to undergo a transition to the first state in response to transition of the switch means from the unactivated to the activated condition and means 201 connects the pulse generating means to the bi-stable means for causing the bi-stable means to undergo a transition to the second state in response to receipt of the pulse and to remain in the second state until such time as transition of the switch means from the unactivated to the activated condition again occurs. The pulse generating means comprises means 212 for generating a pulse train and frequency divider means 213 having an input connected to receive the pulse train and having an output 211 constituting the output of the pulse generating means. In a modification, (not shown), the bi-stable means comprises a thyristor which receives a pulse from the discharge circuit of capacitor 12. A gas lighter incorporating the electronic ignition device is described. The parent Specification 1427741 and the Divisional Specification 1427742 are referred to.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7202407A FR2173663B1 (en) | 1972-01-25 | 1972-01-25 | |
FR7212833A FR2179570B2 (en) | 1972-01-25 | 1972-04-12 | |
FR7224714A FR2192276B2 (en) | 1972-01-25 | 1972-07-07 | |
FR7243967A FR2209914B2 (en) | 1972-01-25 | 1972-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1427743A true GB1427743A (en) | 1976-03-10 |
Family
ID=27446151
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4283775A Expired GB1427742A (en) | 1972-01-25 | 1973-01-22 | Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighter |
GB320073A Expired GB1427741A (en) | 1972-01-25 | 1973-01-22 | Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighter |
GB4283875A Expired GB1427743A (en) | 1972-01-25 | 1973-01-22 | Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighter |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4283775A Expired GB1427742A (en) | 1972-01-25 | 1973-01-22 | Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighter |
GB320073A Expired GB1427741A (en) | 1972-01-25 | 1973-01-22 | Electronic ignition devices for the ignition of fuel gas in for example a cigarette lighter |
Country Status (19)
Country | Link |
---|---|
US (1) | US3883246A (en) |
JP (3) | JPS4948464A (en) |
AR (1) | AR197212A1 (en) |
AT (1) | AT346112B (en) |
AU (1) | AU472691B2 (en) |
BE (1) | BE794534A (en) |
CA (1) | CA1003030A (en) |
CH (1) | CH572192A5 (en) |
DD (1) | DD102207A5 (en) |
DE (1) | DE2303168C3 (en) |
FR (4) | FR2173663B1 (en) |
GB (3) | GB1427742A (en) |
HK (3) | HK63778A (en) |
IE (1) | IE38855B1 (en) |
IL (1) | IL41367A (en) |
IT (1) | IT976520B (en) |
NL (1) | NL7300987A (en) |
OA (1) | OA04317A (en) |
SE (1) | SE401731B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5204339A (en) * | 1986-01-31 | 1993-04-20 | Whitby Research, Inc. | Penetration enhancers for transdermal delivery of systemic agents |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50133370U (en) * | 1974-04-19 | 1975-11-01 | ||
DE2419403C3 (en) * | 1974-04-23 | 1980-05-22 | Rowenta-Werke Gmbh, 6050 Offenbach | Circuit arrangement for generating ignition sparks, preferably for lighters |
US4089636A (en) * | 1974-05-20 | 1978-05-16 | Mansei Kogyo Kabushiki Kaisha | Battery ignitable cigarette lighter |
JPS5318051Y2 (en) * | 1974-12-18 | 1978-05-15 | ||
JPS5186270U (en) * | 1974-12-20 | 1976-07-10 | ||
JPS5192264A (en) * | 1975-02-07 | 1976-08-12 | ||
JPS5194362A (en) * | 1975-02-13 | 1976-08-18 | ||
JPS5194361A (en) * | 1975-02-13 | 1976-08-18 | ||
FR2314613A1 (en) * | 1975-06-11 | 1977-01-07 | Flaminaire | Ignition circuit for gas cigarette lighter - has Darlington pair oscillator which is blocked after each ignition spark |
JPS566764Y2 (en) * | 1975-07-14 | 1981-02-14 | ||
JPS5230271U (en) * | 1975-08-23 | 1977-03-03 | ||
JPS5230272U (en) * | 1975-08-25 | 1977-03-03 | ||
JPS5286865A (en) * | 1976-01-07 | 1977-07-19 | Riyouden Enjiniaringu Kk | Gas igniter |
JPS5288458A (en) * | 1976-01-16 | 1977-07-23 | Uinraitaa Kk | Discharge igniter |
JPS5288459A (en) * | 1976-01-16 | 1977-07-23 | Uinraitaa Kk | Discharge igniter |
JPS5297861A (en) * | 1976-02-12 | 1977-08-17 | Omron Tateisi Electronics Co | Discharge ignition apparatus |
US4054936A (en) * | 1976-03-16 | 1977-10-18 | Matsushita Electric Industrial Co., Ltd. | Gas ignition device |
JPS533772U (en) * | 1976-06-28 | 1978-01-13 | ||
JPS5313976U (en) * | 1976-07-14 | 1978-02-04 | ||
FR2347620A1 (en) * | 1976-07-15 | 1977-11-04 | Bicosa Recherches | FLAME OR SPARK DETECTION DEVICE AND COMBUSTIBLE GAS IGNITER |
JPS5314672U (en) * | 1976-07-16 | 1978-02-07 | ||
JPS5315980A (en) * | 1976-07-28 | 1978-02-14 | Automob Antipollut & Saf Res Center | Lap ignitor for burner |
US4094140A (en) * | 1976-08-24 | 1978-06-13 | Hideki Ohue | Timepiece-gas lighter assembly |
JPS5729173Y2 (en) * | 1977-04-14 | 1982-06-25 | ||
US4220443A (en) * | 1978-05-09 | 1980-09-02 | Bear Russell M | Electro-mechanical chemical firearm device |
CH659553A5 (en) * | 1982-01-26 | 1987-01-30 | Seitz Eugen Ag | ELECTRIC SHOCK GENERATOR CONNECTED TO A LOAD. |
DE3243447C2 (en) * | 1982-11-24 | 1984-09-20 | Ransburg-Gema AG, St.Gallen | Spray device for the electrostatic coating of objects with coating material |
US4565519A (en) * | 1983-01-21 | 1986-01-21 | Advanced Mechanical Technology, Inc. | Burner ignition system |
EP0400294A3 (en) * | 1989-06-02 | 1991-02-06 | Dornier Medizintechnik Gmbh | Pulse circuit for a lithotriptor |
CN100404959C (en) * | 2004-05-29 | 2008-07-23 | 林勇 | Lighter controlled by intelligent cipher |
US20070224557A1 (en) * | 2006-03-22 | 2007-09-27 | I-Hua Huang | Controller for re-igniting |
US20230175694A1 (en) * | 2020-05-22 | 2023-06-08 | Ferel Elektronik San. Ve Tic. A.S. | Dc re-ignition system for a gas burner |
CN114438465B (en) * | 2022-02-18 | 2023-04-21 | 中国工程物理研究院流体物理研究所 | Fast response power supply protection circuit for high-power pulse magnetron sputtering load arcing |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1361581A (en) * | 1963-04-24 | 1964-05-22 | Rowenta Metallwarenfab Gmbh | High voltage ignition lighter |
FR1401241A (en) * | 1964-03-24 | 1965-06-04 | App Thermoflex | Flame ignition, protection and control device, for oil burner type burner or the like |
FR1392983A (en) * | 1964-04-29 | 1965-03-19 | Rowenta Metallwarenfab Gmbh | Spark ignition gas lighter |
JPS4115881Y1 (en) * | 1964-05-26 | 1966-07-25 | ||
US3372306A (en) * | 1964-09-15 | 1968-03-05 | Kobayashi Shinijiro | Proximity controlled automatic cigarette lighter and the like |
US3491281A (en) * | 1964-10-07 | 1970-01-20 | Texas Instruments Inc | Blocking oscillator power supply |
CH443760A (en) * | 1965-01-08 | 1967-09-15 | Plessey Co Ltd | Electric ignition device and use thereof |
US3526788A (en) * | 1966-05-31 | 1970-09-01 | Hughes Aircraft Co | Serially-connected complementary transistor pair switching circuit |
US3628048A (en) * | 1967-04-03 | 1971-12-14 | Santa Barbara Res Center | High current pulsing arrangement to energize coherent radiation source |
US3457456A (en) * | 1968-04-08 | 1969-07-22 | Penn Controls | High voltage spark generator from low voltage supply |
DE2037068B2 (en) * | 1970-07-27 | 1972-01-13 | Braun Ag, 6000 Frankfurt | CIRCUIT ARRANGEMENT FOR GENERATING A HIGH VOLTAGE SPARK |
GB1327564A (en) * | 1971-03-12 | 1973-08-22 | Fiat Spa | Ignition control system |
JPS4713431U (en) * | 1971-03-23 | 1972-10-17 | ||
JPS4733018U (en) * | 1971-05-07 | 1972-12-13 | ||
CA1000349A (en) * | 1971-07-13 | 1976-11-23 | Walter H. Ballantyne | Lighters |
US3718423A (en) * | 1971-09-07 | 1973-02-27 | Johnson Service Co | Automatic fuel ignition system |
US3781163A (en) * | 1972-06-07 | 1973-12-25 | Dunhill Lighters Ltd | Lighter with a capacity discharge ignition system and means for preventing automatic recharging of said capacitor |
-
0
- BE BE794534D patent/BE794534A/en not_active IP Right Cessation
-
1972
- 1972-01-25 FR FR7202407A patent/FR2173663B1/fr not_active Expired
- 1972-04-12 FR FR7212833A patent/FR2179570B2/fr not_active Expired
- 1972-07-07 FR FR7224714A patent/FR2192276B2/fr not_active Expired
- 1972-12-11 FR FR7243967A patent/FR2209914B2/fr not_active Expired
-
1973
- 1973-01-16 OA OA54810A patent/OA04317A/en unknown
- 1973-01-22 GB GB4283775A patent/GB1427742A/en not_active Expired
- 1973-01-22 GB GB320073A patent/GB1427741A/en not_active Expired
- 1973-01-22 GB GB4283875A patent/GB1427743A/en not_active Expired
- 1973-01-22 IL IL41367A patent/IL41367A/en unknown
- 1973-01-22 US US325891A patent/US3883246A/en not_active Expired - Lifetime
- 1973-01-22 IE IE00094/73A patent/IE38855B1/en unknown
- 1973-01-22 SE SE7300879A patent/SE401731B/en unknown
- 1973-01-23 CH CH89973A patent/CH572192A5/xx not_active IP Right Cessation
- 1973-01-23 IT IT9312/73A patent/IT976520B/en active
- 1973-01-23 AU AU51353/73A patent/AU472691B2/en not_active Expired
- 1973-01-23 DD DD168393A patent/DD102207A5/xx unknown
- 1973-01-23 DE DE2303168A patent/DE2303168C3/en not_active Expired
- 1973-01-24 CA CA161,904A patent/CA1003030A/en not_active Expired
- 1973-01-24 AR AR246274A patent/AR197212A1/en active
- 1973-01-24 NL NL7300987A patent/NL7300987A/xx unknown
- 1973-01-24 AT AT57173A patent/AT346112B/en not_active IP Right Cessation
- 1973-01-25 JP JP48010650A patent/JPS4948464A/ja active Pending
-
1977
- 1977-04-18 JP JP4442277A patent/JPS5311679A/en active Pending
-
1978
- 1978-11-02 HK HK637/78A patent/HK63778A/en unknown
- 1978-11-02 HK HK639/78A patent/HK63978A/en unknown
- 1978-11-02 HK HK638/78A patent/HK63878A/en unknown
-
1979
- 1979-09-28 JP JP12424579A patent/JPS5549618A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5204339A (en) * | 1986-01-31 | 1993-04-20 | Whitby Research, Inc. | Penetration enhancers for transdermal delivery of systemic agents |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |