US2739079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making photosensitive plates
Assignee: Individual
•
Filing: 1952-02-18
•
Granted: 1956-03-20
•
Expires: 1972-02-18
Abstract
No abstract record available.
Inventors
- 👤 Paul H Keck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; H; H01; H01J; H01J9/00; H01J9/20; H01J9/233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1491040A
Cited
AU1978029A
Cited
US1997479A
Cited
GB611540A
Cited
US2462157A
Cited
US2476042A
Cited
US2608611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |