Patent US2804537A successfully refreshed from Google Patents.
US2804537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp
Assignee: Voigtlander AG
•
Filing: 1953-12-08
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Granted: 1957-08-27
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Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 Greger Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:27
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0442
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418302A
Cited
US2050085A
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US2384327A
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US2293660A
Cited
FR936649A
Cited
US2703869A
Cited
US2578296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |