US3294537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lith-type emulsions with organosilicone block copolymers
Assignee: Eastman Kodak Co
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Filing: 1965-09-17
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Granted: 1966-12-27
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Expires: 1985-09-17
Abstract
No abstract record available.
Inventors
- 👤 Kirby M Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION IN WHICH THE HALIDE COMPRISES AT LEAST 50 MOLE PERCENT CHLORIDE, SAID EMULSION CONTAINING A BLOCK COPOLYMER COMPRISING BLOCKS OF POLYOXYETHYLENE AND POLYOXYPROPYLENE, ABOUT 10 TO ABOUT 70%, BY WEIGHT, OF SAID COPOLYMER BEING POLYOXYETHYLENE AND THE AVERAGE MOLECULAR WEIGHT OF POLYOXYPROPYLENE IN SAID COPOLYMER BEING IN THE RANGE OF ABOUT 800 TO ABOUT 3,000, SAID BLOCK COPOLYMER CONTAINING UP TO ABOUT 15 PERCENT, BY WEIGHT, OF SILICON ATOMS IN THE MAIN POLYMER CHAIN.
Claim 2
Dependent Claim
79 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION IN WHICH THE HALIDE COMPRISES AT LEAST 50 MOLE PERCENT CHLORIDE, SAID EMULSION CONTAINING A BLOCK COPOLYMER COMPRISING BLOCKS OF POLYOXYETHYLENE AND POLYOXYPROPYLENE, ABOUT 10 TO ABOUT 70%, BY WEIGHT, OF SAID COPOLYMER BEING POLYOXYETHYLENE AND THE AVERAGE MOLECULAR WEIGHT OF POLYOXYPROPYLENE IN SAID COPOLYMER BEING IN THE RANGE OF ABOUT 800 TO ABOUT 3,000, SAID BLOCK COPOLYMER CONTAINING UP TO ABOUT 15 PERCENT, BY WEIGHT, OF SILICON ATOMS IN THE MAIN POLYMER CHAIN.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |