Patent FR854199A successfully refreshed from Google Patents.
US3676729A
Expired / Lapsed
US
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Arc discharge lamp having a thin continuous film of indium oxide on the inner surface thereof
Assignee: GTE Sylvania Inc
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Filing: 1969-06-23
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Granted: 1972-07-11
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Expires: 1989-06-23
Abstract
Abstract An arc discharge lamp has a clear glass envelope on the inner surface of which is disposed a thin, continuous film of indium oxide. The film transmits visible light but absorbs ultraviolet radiation. A phosphor coating may be disposed on the indium oxide film. In order to form the film, a solution of an indium salt of a pre-selected organic acid is applied to the glass, dried under controlled conditions and heated to a predetermined temperature to convert the indium salt to indium oxide.
Inventors
- 👤 Richard A Menelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:54
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |