GB287563A - Improvements in or relating to gasfilled electric incandescent lamps - Google Patents

Improvements in or relating to gasfilled electric incandescent lamps

Info

Publication number: GB287563A
Authority: GB; United Kingdom
Prior art keywords: relating; incandescent lamps; electric incandescent; gasfilled; gasfilled electric
Prior art date: 1927-03-25
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

GB8332/28A

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.)

1927-03-25

Filing date

1928-03-19

Publication date

1928-08-30

1928-03-19 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1928-08-30 Publication of GB287563A publication Critical patent/GB287563A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters

Landscapes

Discharge Lamp (AREA)
Vessels And Coating Films For Discharge Lamps (AREA)

GB8332/28A 1927-03-25 1928-03-19 Improvements in or relating to gasfilled electric incandescent lamps Expired GB287563A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL287563X		1927-03-25

Publications (1)

Publication Number	Publication Date
GB287563A true GB287563A (en)	1928-08-30

Family

ID=19782600

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB8332/28A Expired GB287563A (en)	1927-03-25	1928-03-19	Improvements in or relating to gasfilled electric incandescent lamps

Country Status (5)

Country	Link
BE (1)	BE349845A (fr)
DE (1)	DE494944C (fr)
FR (1)	FR651059A (fr)
GB (1)	GB287563A (fr)
NL (1)	NL22482C (fr)

0
- NL NL22482D patent/NL22482C/xx active
- BE BE349845D patent/BE349845A/xx unknown
1928
- 1928-03-13 DE DEN28564D patent/DE494944C/de not_active Expired
- 1928-03-19 GB GB8332/28A patent/GB287563A/en not_active Expired
- 1928-03-20 FR FR651059D patent/FR651059A/fr not_active Expired

Also Published As

Publication number	Publication date
DE494944C (de)	1930-03-31
FR651059A (fr)	1929-02-14
NL22482C (fr)	1929-03-15
BE349845A (fr)

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