US3698909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic dye image stabilizer-solvent
Assignee: Eastman Kodak Co
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Filing: 1970-08-12
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Granted: 1972-10-17
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Expires: 1990-08-12
Abstract
Abstract A PHOTOGRAPHIC ELEMENT UTILIZING A COLOR COUPLER COMPOUND DISSOLVED PRIMARILY IN A STERICALLY HINDERED PHENOL EXEMPLIFIED BY A CHROMAN - 6 - OL; A SILVER HALIDE EMULSION CONTAINING SUCH A DISSOLVED COUPLER COMPOUND AND A METHOD FOR UTILIZING THE ELEMENT OR EMULSION TO OBTAIN DURABLE PRODUCTS HAVING REDUCED BULK AND GOOD IMAGE STABILITY TO LIGHT.
Inventors
- 👤 Gregory James Lestina
- 👤 Max Herman Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:38
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/82; C07D307/91; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |