FR512878A - Gas-filled incandescent electric lamp - Google Patents

Gas-filled incandescent electric lamp

Info

Publication number: FR512878A
Authority: FR; France
Prior art keywords: gas; electric lamp; incandescent electric; filled incandescent; filled
Prior art date: 1913-12-31
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.)

Siemens and Halske AG

Siemens AG

Original Assignee

Siemens and Halske AG

Siemens AG

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.)

1913-12-31

Filing date

1920-04-01

Publication date

1921-02-02

1920-04-01 Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG

1921-02-02 Application granted granted Critical

1921-02-02 Publication of FR512878A publication Critical patent/FR512878A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/58—Cooling arrangements

FR512878D 1913-12-31 1920-04-01 Gas-filled incandescent electric lamp Expired FR512878A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE333357T		1913-12-31

Publications (1)

Publication Number	Publication Date
FR512878A true FR512878A (en)	1921-02-02

Family

ID=38123970

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR512878D Expired FR512878A (en)	1913-12-31	1920-04-01	Gas-filled incandescent electric lamp

Country Status (3)

Country	Link
DE (2)	DE333357C (en)
FR (1)	FR512878A (en)
NL (1)	NL4105C (en)

1913
- 1913-12-31 DE DE1913333357D patent/DE333357C/en not_active Expired
1914
- 1914-03-05 DE DES41576D patent/DE357686C/en not_active Expired
- 1914-09-10 NL NL5214A patent/NL4105C/en active
1920
- 1920-04-01 FR FR512878D patent/FR512878A/en not_active Expired

Also Published As

Publication number	Publication date
NL4105C (en)	1914-09-10
DE357686C (en)	1922-08-29
DE333357C (en)	1921-02-22

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