Patent US2596677A successfully refreshed from Google Patents.
US2596677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making masks for photographic transparencies
Assignee: Eastman Kodak Co
•
Filing: 1947-12-06
•
Granted: 1952-05-13
•
Expires: 1967-12-06
Abstract
No abstract record available.
Inventors
- 👤 John W Gosling
- 👤 Charles S Combs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:27
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US762816A
Cited
US1499230A
Cited
US2336663A
Cited
US2266435A
Cited
US2338878A
Cited
US2299990A
Cited
US2367551A
Cited
US2420636A
Cited
US2363689A
Cited
US2407211A
Cited
US2400366A
Cited
US2409976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |