Patent US2913892A successfully refreshed from Google Patents.
US2913892A
Expired / Lapsed
US
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Photoflash lamp
Assignee: Union Carbide Corp
•
Filing: 1956-08-06
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Granted: 1959-11-24
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Expires: 1976-08-06
Abstract
No abstract record available.
Inventors
- 👤 William H Fritz
- 👤 Norman M Potter
- 👤 Mason C Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:06
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US498929A
Cited
US1136684A
Cited
FR579389A
Cited
US1986474A
Cited
US2071369A
Cited
US2285125A
Cited
US2486010A
Cited
US2474335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |