US2431996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of color negative film containing integral masking images for color correction
Assignee: GAF Chemicals Corp
•
Filing: 1944-05-03
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Granted: 1947-12-02
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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
2026-10-28 00:20
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308538A
Cited
US1229546A
Cited
US2193931A
Cited
US2340656A
Cited
US2203656A
Cited
US2221025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |