Patent US3469987A successfully refreshed from Google Patents.
US3469987A
Expired / Lapsed
US
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Method of spectrally sensitizing photographic silver halide emulsions
Assignee: Eastman Kodak Co
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Filing: 1965-06-21
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Granted: 1969-09-30
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 James M Owens
- 👤 James L Graham
- 👤 Edward A Pilsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:17
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2369469A
Cited
US2360289A
Cited
US2478400A
Cited
GB733731A
Cited
US2801171A
Cited
US2991177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |