US3772032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide emulsions
Assignee: 3M Co
•
Filing: 1971-06-16
•
Granted: 1973-11-13
•
Expires: 1991-06-16
Abstract
Abstract A silver halide photographic emulsion wherein silver halide grains are distributed throughout an aqueous colloid which includes a polymeric latex prepared by emulsion polymerization in the presence of at least 5 percent by weight of an emulsifying agent, which latex reduces stress-sensitivity of the emulsion.
Inventors
- 👤 I Pearson
- 👤 L Butler
- 👤 L Errede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
21 words
An emulsion according to claim 1 in which the aqueous colloid consists of a mixture of gelatin and said polymeric latex.
Claim 2
Dependent Claim
27 words
An emulsion according to claim 2 which contains about 2 parts in weight of gelatin and about 1 part by weight of solids of said polymeric latex.
Claim 3
Dependent Claim
17 words
An emulsion according to claim 1 in which said polymeric latex is an acrylate homopolymer or copolymer.
Claim 4
Dependent Claim
25 words
An emulsion according to claim 4 in which said polymeric latex is a blend of 50% butyl acrylate and 50% styrene or a poly-ethylacrylate-methylmeth-acrylate copolymer.
Claim 5
Dependent Claim
22 words
An emulsion according to claim 1 in which said emulsifying agent is a polyethylene oxide terminated with phenoxide and phosphate end groups.
Claim 6
Dependent Claim
22 words
An emulsion according to claim 1 in which said emulsifying agent is a polypropylene oxide terminated with aryloxide and phosphate end groups.
Claim 7
Dependent Claim
20 words
A photographic material which includes a photographic backing sheet and at least one layer of silver halide emulsion of claim
References Cited (Backward Citations)
US3525620A
Cited
US3547650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |