US2551892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic film developing and fixing apparatus
Assignee: Individual
•
Filing: 1948-08-02
•
Granted: 1951-05-08
•
Expires: 1968-08-02
Abstract
No abstract record available.
Inventors
- 👤 John P Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:31
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/006; G03D13/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US661819A
Cited
US820646A
Cited
US1463489A
Cited
US1772834A
Cited
US1891917A
Cited
US1890366A
Cited
US1810857A
Cited
US1958791A
Cited
CH192598A
Cited
US2232998A
Cited
US2346530A
Cited
US2412317A
Cited
US2445496A
Cited
US2446958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |