US3294540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lith-type emulsions with block co-polymers
Assignee: Eastman Kodak Co
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Filing: 1963-12-17
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Granted: 1966-12-27
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Expires: 1983-12-17
Abstract
No abstract record available.
Inventors
- 👤 Charles A Goffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT COATED WITH AT LEAST ONE HYDROPHILLIC COLLOID LAYER CONTAINING A SILVER HALIDE EMULSION IN WHICH THE CHLORIDE COMPRISES AT LEAST 60 MOLE PERCENT OF THE HALIDE, AND AT LEAST ONE HYDROPHILIC COLLOID LAYER CONTAINING A WATERSOLUBLE BLOCK POLYMER OF POLYOXYPROPYLENE AND POLYOXYETHYLENE IN WHICH THE POLYOXYPROPYLENE MOIETY HAS AN AVERAGE MOLECULAR WEIGHT BETWEEN 800 AND 3,000 AND THE POLYOXYETHYLENE UNITS CONSTITUTE FROM ABOUT 10 TO ABOUT 70 PERCENT BY WEIGHT OF SAID POLYMERS, SUCH THAT THE SAID BLOCK POLYMER IS CONTIGUOUS TO THE SAID SILVER HALIDE.
Claim 2
Dependent Claim
93 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT COATED WITH AT LEAST ONE HYDROPHILLIC COLLOID LAYER CONTAINING A SILVER HALIDE EMULSION IN WHICH THE CHLORIDE COMPRISES AT LEAST 60 MOLE PERCENT OF THE HALIDE, AND AT LEAST ONE HYDROPHILIC COLLOID LAYER CONTAINING A WATERSOLUBLE BLOCK POLYMER OF POLYOXYPROPYLENE AND POLYOXYETHYLENE IN WHICH THE POLYOXYPROPYLENE MOIETY HAS AN AVERAGE MOLECULAR WEIGHT BETWEEN 800 AND 3,000 AND THE POLYOXYETHYLENE UNITS CONSTITUTE FROM ABOUT 10 TO ABOUT 70 PERCENT BY WEIGHT OF SAID POLYMERS, SUCH THAT THE SAID BLOCK POLYMER IS CONTIGUOUS TO THE SAID SILVER HALIDE.
References Cited (Backward Citations)
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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 |