FR539229A - Manufacturing process of carbon filaments for incandescent lamps - Google Patents

Manufacturing process of carbon filaments for incandescent lamps

Info

Publication number: FR539229A
Authority: FR; France
Prior art keywords: manufacturing process; incandescent lamps; carbon filaments; filaments; carbon
Prior art date: 1920-09-12
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

Inventor

Kikei Nishikawa

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.)

1920-09-12

Filing date

1921-08-10

Publication date

1922-06-23

1921-08-10 Application filed filed Critical

1922-06-23 Application granted granted Critical

1922-06-23 Publication of FR539229A publication Critical patent/FR539229A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/02—Incandescent bodies
- H01K1/04—Incandescent bodies characterised by the material thereof
- H01K1/06—Carbon bodies

FR539229D 1920-09-12 1921-08-10 Manufacturing process of carbon filaments for incandescent lamps Expired FR539229A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP539229X		1920-09-12

Publications (1)

Publication Number	Publication Date
FR539229A true FR539229A (en)	1922-06-23

Family

ID=12956213

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR539229D Expired FR539229A (en)	1920-09-12	1921-08-10	Manufacturing process of carbon filaments for incandescent lamps

Country Status (1)

Country	Link
FR (1)	FR539229A (en)

1921
- 1921-08-10 FR FR539229D patent/FR539229A/en not_active Expired

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