US3043698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic gelatin-silver halide emulsions containing beta-hydroxyalkyl ethers of polyvinyl alcohol
Assignee: EIDP Inc
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Filing: 1960-08-18
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Granted: 1962-07-10
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Expires: 1980-08-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Vaughan Crandall Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; C; C08; C08F; C08F8/00; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING ON A DRY BASIS, BY WEIGHT, 30% TO 75% SILVER HALIDE, 20% TO 65% GELATIN AND 5% TO 50% OF A WATER-SOLUBLE B-HYDROXYALKYL ETHER OF A POLYVINYL ALCOHOL, WHEREIN THE ALKYL GROUP CONTAINING 2 TO 3 CARBON ATOMS, SAID ETHER CONTAINING INTRALINEAR UNITS REPRESENTED BY THE FORMULAE
Claim 2
Dependent Claim
53 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING ON A DRY BASIS, BY WEIGHT, 30% TO 75% SILVER HALIDE, 20% TO 65% GELATIN AND 5% TO 50% OF A WATER-SOLUBLE B-HYDROXYALKYL ETHER OF A POLYVINYL ALCOHOL, WHEREIN THE ALKYL GROUP CONTAINING 2 TO 3 CARBON ATOMS, SAID ETHER CONTAINING INTRALINEAR UNITS REPRESENTED BY THE FORMULAE
References Cited (Backward Citations)
GB687751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |