US2835582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelatin-polymeric hydrosol mixtures and photographic articles prepared therefrom
Assignee: Eastman Kodak Co
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Filing: 1954-02-03
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Granted: 1958-05-20
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Fowler
- 👤 Richard J Hellmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
PHOTOGRAPHIC FILM CONTAINING A SILVER HALIDE AND INCLUDING AS A LAYER THEREOF A COMPATIBLE MIXTURE OF GELATIN AND A SEPARATELY PERFORMED POLYMERIC MATERIAL, SAID POLYMERIC MATERIAL BEING A HYDROSOL CONTAINING AN AMPHOLYTIC SURFACE-ACTIVE MATERIAL AND OBTAINED BY POLYMERIZING MONOOLEFINIC MATERIAL CONSISTING OF AT LEAST ONE MONOETHYLENICALLY UNSATURATED POLYMERIZABLE MONOMER IN AQUEOUS EMULSION AND IN THE PRESENCE OF AN AMPHOLYTIC SURFACE-ACTIVE MATERIAL WHICH IS SELECTED FROM THE GROUP CONSISTING OF BETAINES, GLYCINES, AND ALKALI METAL SALTS OF TAURINES, EACH OF THE MEMBERS OF SAID GROUP CONSISTING AN N-ALKYL GROUP OF 12-18 CARBON ATOMS.
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |