FR661408A - Process for obtaining photogravures - Google Patents

Process for obtaining photogravures

Info

Publication number
FR661408A
FR661408A FR661408DA FR661408A FR 661408 A FR661408 A FR 661408A FR 661408D A FR661408D A FR 661408DA FR 661408 A FR661408 A FR 661408A
Authority
FR
France
Prior art keywords
photogravures
obtaining
obtaining photogravures
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)
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.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR661408A publication Critical patent/FR661408A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
    • H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
FR661408D 1927-10-28 1928-10-02 Process for obtaining photogravures Expired FR661408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL661408X 1927-10-28

Publications (1)

Publication Number Publication Date
FR661408A true FR661408A (en) 1929-07-25

Family

ID=19797861

Family Applications (1)

Application Number Title Priority Date Filing Date
FR661408D Expired FR661408A (en) 1927-10-28 1928-10-02 Process for obtaining photogravures

Country Status (1)

Country Link
FR (1) FR661408A (en)

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