US3052544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifoggant and stabilizer for photographic silver halide emulisions
Assignee: GAF Chemicals Corp
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Filing: 1959-03-06
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Granted: 1962-09-04
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Expires: 1979-03-06
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C1/043
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A LIGHT-SENSITIVE ORGANIC COLLOID SILVER HALIDE EMULSION CONTAINING A SENSITIZING COMPOUND SELECTED FROM THE GROUP CONSISTING OFPOLALKYLENE OXIDE AND CONDENSATION PRODUCTS THEREOF AND CONTAINING, IN ADDITION TO SAID COLLOID, A VINYLPYRROLIDONE-VINYL ACETATE COPOLYMER AS AN ANTIFOGGING AND STABILIZING AGENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |