US2660375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic exposure calculator
Assignee: Individual
•
Filing: 1949-11-30
•
Granted: 1953-11-24
•
Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 Carquillat Pierre Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:02
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1655A
Cited
US215133A
Cited
US659727A
Cited
US661096A
Cited
US658258A
Cited
US725807A
Cited
US871087A
Cited
US886189A
Cited
US1039245A
Cited
US1041765A
Cited
US1715270A
Cited
DE487685C
Cited
US1996828A
Cited
US2287430A
Cited
US2284783A
Cited
US2343257A
Cited
US2436966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |