US3272631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Haze reduction of photographic emulsions containing a covering power agent
Assignee: EIDP Inc
•
Filing: 1964-01-03
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Granted: 1966-09-13
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Expires: 1984-01-03
Abstract
No abstract record available.
Inventors
- 👤 Garrett Alfred Gardner
- 👤 Strange Raymond Joseph Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:08
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
42 words
IN A PHOTOGRAPHIC EMULSION CONTAINING GELATIN, A SILVER HALIDE AND A COVERING POWER AGENT THE IMPROVEMENT WHICH COMPRISES ABOUT 2 TO 15 PARTS PER 100 PARTS OF GELATIN OF A COMPOUND SELECTED FROM THE GROUP CONSISTING ALKALI METAL SULFATES AND AMMONIUM SULFATE.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |