Patent US2832996A successfully refreshed from Google Patents.
Patent US2922065A successfully refreshed from Google Patents.
US2922065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp
Assignee: Westinghouse Electric Corp
•
Filing: 1956-01-20
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Granted: 1960-01-19
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Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
- 👤 Meister George
- 👤 Nicholas F Cerulli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:48
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
AN INCANDESCENT LAMP HAVING A LIGHT-TRANSMITTING ENVELOPE AND CARRYING ON THE INTERNAL SURFACE OF SAID ENVELOPE OF COATING OF FINELY-DIVIDED, POROUS, GENERALLYAMORPHOUS SILICA, SAID SILICA COATING POSSESSING FROM 1.55% TO 4.8% BY WEIGHT OF MOISTURE, AND SAID SILICA COATING AT NORMAL-OPERATION MINIMUM LAMP ENVELOPE TEMPERATURES CONSTITUTING A GETTER FOR AT LEAST 0.4% BY WEIGHT OF MOISTURE.
Claim 2
Dependent Claim
56 words
AN INCANDESCENT LAMP HAVING A LIGHT-TRANSMITTING ENVELOPE AND CARRYING ON THE INTERNAL SURFACE OF SAID ENVELOPE OF COATING OF FINELY-DIVIDED, POROUS, GENERALLYAMORPHOUS SILICA, SAID SILICA COATING POSSESSING FROM 1.55% TO 4.8% BY WEIGHT OF MOISTURE, AND SAID SILICA COATING AT NORMAL-OPERATION MINIMUM LAMP ENVELOPE TEMPERATURES CONSTITUTING A GETTER FOR AT LEAST 0.4% BY WEIGHT OF MOISTURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |