US2464798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color correction of multicolor negative film by integral masking images
Assignee: GAF Chemicals Corp
•
Filing: 1944-05-03
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Granted: 1949-03-22
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Expires: 1964-05-03
Abstract
No abstract record available.
Inventors
- 👤 Herman H Duerr
- 👤 Jr Herbert W Morreall
- 👤 Harold C Harsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:37
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308538A
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US1229546A
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GB375338A
Cited
US2183394A
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US2137336A
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US2193931A
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US2340656A
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US2203656A
Cited
US2221025A
Cited
US2307162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |