Patent US3528811A successfully refreshed from Google Patents.
US3528811A
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Photographic emulsions containing a pyrimidinedione and a desensitizing nucleus linked by a dimethine or a double bond
Assignee: Eastman Kodak Co
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Filing: 1967-05-17
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Granted: 1970-09-15
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Expires: 1987-05-17
Abstract
No abstract record available.
Inventors
- 👤 Frank G Webster
- 👤 Donald W Heseltine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; C; C09; C09B; C09B23/00; C09B23/10; C09B23/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2464780A
Cited
US2482532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |