US2501017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic light control device
Assignee: Individual
•
Filing: 1947-03-14
•
Granted: 1950-03-21
•
Expires: 1967-03-14
Abstract
No abstract record available.
Inventors
- 👤 George L Abrums
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:45
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319962A
Cited
US1088695A
Cited
US1295342A
Cited
US1348746A
Cited
US1988022A
Cited
US1985097A
Cited
US2261953A
Cited
US2258140A
Cited
US2314829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |