US2831767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-dispersible protein polymer compositions and silver halide emulsions containing same
Assignee: Eastman Kodak Co
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Filing: 1954-04-29
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Granted: 1958-04-22
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 John R Dann
- 👤 Bernard D Illingsworth
- 👤 Jr John W Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F289/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A SILVER HALIDE EMULSION IN GELATIN ADMIXED WITH WATER-SOLUBLE, GELATIN-COMPATIBLE POLYMERIC MATERIAL RESULTING FROM COPOLYMERIZATION OF A MIXTURE OF 50-95% BY WEIGHT OF A SATURATED PROTEIN MATERIAL SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED PROTEINS AND ACYLATED PROTEINS, AND 95-50% BY WEIGHT OF A SINGLE POLYMERIZABLE MONOMER FROM THE GROUP CONSISTING OF ACRYLIC ACID, ACRYLAMIDE AND VINYL PYRIDINE MONOMERS.
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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) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |