FR857830A - Improvements to colored electric lamps - Google Patents

Improvements to colored electric lamps

Info

Publication number
FR857830A
FR857830A FR857830DA FR857830A FR 857830 A FR857830 A FR 857830A FR 857830D A FR857830D A FR 857830DA FR 857830 A FR857830 A FR 857830A
Authority
FR
France
Prior art keywords
electric lamps
colored electric
colored
lamps
electric
Prior art date
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
French (fr)
Inventor
Emile Robert Bonnefoy-Cudraz
Edmond Camille Vandewalle
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.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR857830A publication Critical patent/FR857830A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
FR857830D 1939-04-12 1939-04-12 Improvements to colored electric lamps Expired FR857830A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR857830T 1939-04-12

Publications (1)

Publication Number Publication Date
FR857830A true FR857830A (en) 1940-10-01

Family

ID=9329676

Family Applications (1)

Application Number Title Priority Date Filing Date
FR857830D Expired FR857830A (en) 1939-04-12 1939-04-12 Improvements to colored electric lamps

Country Status (1)

Country Link
FR (1) FR857830A (en)

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