Patent US2950314A successfully refreshed from Google Patents.
US2950314A
Expired / Lapsed
US
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Color couplers for color photography
Assignee: Gevaert Photo Producten NV
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Filing: 1956-04-03
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Granted: 1960-08-23
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Expires: 1976-04-03
Abstract
No abstract record available.
Inventors
- 👤 Cat Arthur Henri De
- 👤 Raphael Karel Van Poucke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:31
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/006; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/44; C07D277/46; C07D277/54; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
A SULPHONATED AROYL-ACETARYLIDE OF THE FOLLOWING STRUCTURE:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |