FR1139010A - Perfectionnements aux photosurfaces - Google Patents

Perfectionnements aux photosurfaces

Info

Publication number: FR1139010A
Authority: FR; France
Prior art keywords: photosurfaces; photosurfaces improvements
Prior art date: 1955-12-21
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.)

Schlumberger Well Surveying Corp

Original Assignee

Schlumberger Well Surveying Corp

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.)

1955-12-21

Filing date

1955-12-21

Publication date

1957-06-24

1955-12-21 Application filed by Schlumberger Well Surveying Corp filed Critical Schlumberger Well Surveying Corp

1957-06-24 Application granted granted Critical

1957-06-24 Publication of FR1139010A publication Critical patent/FR1139010A/fr

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/02—Details
- H01J40/04—Electrodes

FR1139010D 1955-12-21 1955-12-21 Perfectionnements aux photosurfaces Expired FR1139010A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR1139010T		1955-12-21

Publications (1)

Publication Number	Publication Date
FR1139010A true FR1139010A (fr)	1957-06-24

Family

ID=9641480

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR1139010D Expired FR1139010A (fr)	1955-12-21	1955-12-21	Perfectionnements aux photosurfaces

Country Status (1)

Country	Link
FR (1)	FR1139010A (fr)

1955
- 1955-12-21 FR FR1139010D patent/FR1139010A/fr not_active Expired

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