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US2279880A
Expired / Lapsed
US
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Photoflash lamp
Assignee: Westinghouse Electric Corp
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Filing: 1940-01-26
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Granted: 1942-04-14
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Expires: 1960-01-26
Abstract
No abstract record available.
Inventors
- 👤 Margitta Michael J Neumann De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:08
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/70; F; F21; F21K; F21K5/00; F21K5/02
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) | 1945-04-13 | 1945-10-13 | 1946-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-13 | 1949-10-13 | 1950-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-13 | 1953-10-13 | 1954-04-14 | $7700.00 | Window Closed / Lapsed |