US3003877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot prevention in photographic emulsions and colloid layers
Assignee: Eastman Kodak Co
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Filing: 1957-06-27
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Granted: 1961-10-10
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Expires: 1977-06-27
Abstract
No abstract record available.
Inventors
- 👤 Leonard T Mclaughlin
- 👤 Bill R Burks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38; Y; Y10; Y10S; Y10S430/00; Y10S430/152
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
A PHOTOGRAPHIC GELATINO-SILVER-HALIDE EMULSION COMPRISING (1) A SYNTHETIC SPREADING AGENT SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |