FR941092A - Method for producing photographic contrasts - Google Patents

Method for producing photographic contrasts

Info

Publication number: FR941092A
Authority: FR; France
Prior art keywords: producing photographic; contrasts; photographic contrasts; producing; photographic
Prior art date: 1946-01-21
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

Application number

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Koninklijke Philips NV

Original Assignee

Philips Gloeilampenfabrieken NV

Priority date (The priority date 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 date listed.)

1946-01-21

Filing date

1947-01-20

Publication date

1948-12-31

1947-01-20 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1948-12-31 Application granted granted Critical

1948-12-31 Publication of FR941092A publication Critical patent/FR941092A/en

Status Expired legal-status Critical Current

Classifications

- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/52—Compositions containing diazo compounds as photosensitive substances
- G03C1/62—Metal compounds reducible to metal
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D17/00—Parachutes
- B64D17/40—Packs
- B64D17/52—Opening, e.g. manual

Landscapes

Engineering & Computer Science (AREA)
Aviation & Aerospace Engineering (AREA)
Chemical & Material Sciences (AREA)
Materials Engineering (AREA)
Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Silver Salt Photography Or Processing Solution Therefor (AREA)

FR941092D 1946-01-21 1947-01-20 Method for producing photographic contrasts Expired FR941092A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL272285X		1946-01-21

Publications (1)

Publication Number	Publication Date
FR941092A true FR941092A (en)	1948-12-31

Family

ID=19781980

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR941092D Expired FR941092A (en)	1946-01-21	1947-01-20	Method for producing photographic contrasts

Country Status (6)

Country	Link
US (1)	US2571670A (en)
CH (1)	CH272285A (en)
DE (1)	DE832543C (en)
FR (1)	FR941092A (en)
GB (1)	GB678912A (en)
NL (1)	NL70689C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE506160A (en) *	1950-10-03
US2733144A (en) *	1951-03-28	1956-01-31		Method of producing photographic

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2269161A (en) *		1942-01-06		morse
US466534A (en) *		1892-01-05		Island
US1067690A (en) *	1912-08-01	1913-07-15	Kay M Stewart	Pump.
US1396770A (en) *	1919-06-14	1921-11-15	Eastman Kodak Co	Method and apparatus for making photographic records
BE343949A (en) *	1926-07-09
DE480352C (en) *	1927-01-26	1929-08-08	Ervin Burg Dr	Process for accelerating the development processes of photographic and tracing papers by means of gases or vapors
US1861918A (en) *	1928-01-30	1932-06-07	Eastman Kodak Co	Process of conditioning photographic films
GB377145A (en) *	1931-04-02	1932-07-21	Ig Farbenindustrie Ag	An improvement in producing sound and picture records
FR735718A (en) *	1931-07-21	1932-11-14		Process for preparing and fixing photographic layers obtained with dazosulphonates
FR741172A (en) *	1931-11-09	1933-02-08
US1997507A (en) *	1932-03-09	1935-04-09	Vladimir C Akintievsky	Process of photo-printing
BE407017A (en) *	1933-12-27
GB503092A (en) *	1937-05-27	1939-03-26	Eastman Kodak Co	Improved process of treating sensitive photographic film
US2196110A (en) *	1937-06-14	1940-04-02	Ig Farbenindustrie Ag	Process of producing sound films
BE429591A (en) *	1937-08-09
US2252006A (en) *	1938-01-08	1941-08-12	Hartford Nat Bank & Trust Co	Sound-picture film and method of printing the same
FR853868A (en) *	1938-11-19	1940-03-30		Method for obtaining reproduction of images by means of disazo compounds

0
- NL NL70689D patent/NL70689C/xx active
1947
- 1947-01-17 GB GB1599/47A patent/GB678912A/en not_active Expired
- 1947-01-20 FR FR941092D patent/FR941092A/en not_active Expired
- 1947-01-20 CH CH272285D patent/CH272285A/en unknown
- 1947-01-21 US US723426A patent/US2571670A/en not_active Expired - Lifetime
1948
- 1948-11-05 DE DEP20766A patent/DE832543C/en not_active Expired

Also Published As

Publication number	Publication date
GB678912A (en)	1952-09-10
CH272285A (en)	1950-12-15
NL70689C (en)
US2571670A (en)	1951-10-16
DE832543C (en)	1952-02-25

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