Patent US3523023A successfully refreshed from Google Patents.
US3523023A
Expired / Lapsed
US
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Chemically sensitizing photographic silver halide emulsions with phosphonium compounds
Assignee: Eastman Kodak Co
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Filing: 1967-03-10
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Granted: 1970-08-04
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Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 Wesley G Lowe
- 👤 Arthur H Herz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/494; G03C1/496; G03C1/4965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3029559A
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US3107756A
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US3020182A
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US2960801A
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US3006775A
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US3117881A
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US3220815A
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US3313609A
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US3380818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |