US2489548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing frame for photographic films or plates
Assignee: C & S Products Inc
•
Filing: 1946-02-01
•
Granted: 1949-11-29
•
Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:37
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/08; G03D13/12; G03D13/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1629285A
Cited
US1032839A
Cited
US1572337A
Cited
GB240735A
Cited
US1987067A
Cited
US2207211A
Cited
US2401241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |