FR697232A - Electric discharge tube - Google Patents

Electric discharge tube

Info

Publication number: FR697232A
Authority: FR; France
Prior art keywords: electric discharge; discharge tube; tube; electric; discharge
Prior art date: 1929-06-22
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.)

1929-06-22

Filing date

1930-06-11

Publication date

1931-01-13

1930-06-11 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1931-01-13 Application granted granted Critical

1931-01-13 Publication of FR697232A publication Critical patent/FR697232A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
- H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope

FR697232D 1929-06-22 1930-06-11 Electric discharge tube Expired FR697232A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL46900A NL31935C (en)	1929-06-22	1929-06-22

Publications (1)

Publication Number	Publication Date
FR697232A true FR697232A (en)	1931-01-13

Family

ID=10150444

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR697232D Expired FR697232A (en)	1929-06-22	1930-06-11	Electric discharge tube

Country Status (4)

Country	Link
DE (1)	DE626399C (en)
FR (1)	FR697232A (en)
GB (1)	GB336222A (en)
NL (1)	NL31935C (en)

1929
- 1929-06-22 NL NL46900A patent/NL31935C/xx active
- 1929-07-05 GB GB2071429A patent/GB336222A/en not_active Expired
1930
- 1930-06-11 FR FR697232D patent/FR697232A/en not_active Expired
- 1930-06-13 DE DE1930626399D patent/DE626399C/en not_active Expired

Also Published As

Publication number	Publication date
NL31935C (en)	1934-02-15
DE626399C (en)	1936-02-25
GB336222A (en)	1930-10-06

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