Patent US4022623A successfully refreshed from Google Patents.
US4022623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive emulsion containing polyvinyl aminimide polymers
Assignee: Polaroid Corp
•
Filing: 1975-10-28
•
Granted: 1977-05-10
•
Expires: 1995-10-28
Abstract
Abstract A photosensitive silver halide emulsion wherein the emulsion binder comprises a polyvinyl aminimide polymer or copolymer.
Inventors
- 👤 Maurice J. Fitzgerald
- 👤 Henry S. Kolesinski
- 👤 Lloyd D. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
71 words
A photosensitive silver halide emulsion containing an emulsion binder wherein the emulsion binder consists essentially of a water-soluble film-forming polyvinyl aminimide polymer havingin its structure repeating units of the formula: ##STR5## wherein R is hydrogen, alkyl or halogen; R 1 is alkyl; R 2 and R 3 each are alkyl, aryl or alkaryl or R 2 and R 3 may be taken together to form a heterocyclic ring with the nitrogen.
Claim 2
Dependent Claim
71 words
A photosensitive silver halide emulsion containing an emulsion binder wherein the emulsion binder consists essentially of a water-soluble film-forming polyvinyl aminimide polymer havingin its structure repeating units of the formula: ##STR5## wherein R is hydrogen, alkyl or halogen; R 1 is alkyl; R 2 and R 3 each are alkyl, aryl or alkaryl or R 2 and R 3 may be taken together to form a heterocyclic ring with the nitrogen.
Claim 3
Dependent Claim
15 words
The product of claim 1 wherein said silver halide emulsion is a silver iodobromide emulsion.
Claim 4
Dependent Claim
12 words
The product of claim 1 wherein said polymer is poly- 1,1,1-trimethylamine acrylimide.
Claim 5
Dependent Claim
12 words
The product of claim 1 wherein said polymer is poly-1,1-dimethyl-1-(2-hydroxypropyl) amine methacrylimide.
Claim 6
Independent Claim
88 words
A method of preparing a photosensitive silver halide emulsion which comprises reacting a water-soluble silver salt with a water-soluble halide salt in an aqueous solution containing a water-soluble film-forming binder polymer consisting essentially of a polyvinyl aminimide polymer having in its structure repeating units of the formula: ##STR6## wherein R is hydrogen, alkyl or halogen; R 1 is alkyl; R 2 and R 3 each are alkyl, aryl or alkaryl or R 2 and R 3 may be taken together to form a heterocyclic ring with the nitrogen.
Claim 7
Independent Claim
88 words
A method of preparing a photosensitive silver halide emulsion which comprises reacting a water-soluble silver salt with a water-soluble halide salt in an aqueous solution containing a water-soluble film-forming binder polymer consisting essentially of a polyvinyl aminimide polymer having in its structure repeating units of the formula: ##STR6## wherein R is hydrogen, alkyl or halogen; R 1 is alkyl; R 2 and R 3 each are alkyl, aryl or alkaryl or R 2 and R 3 may be taken together to form a heterocyclic ring with the nitrogen.
Claim 8
Dependent Claim
13 words
A method as defined in claim 5 wherein said polymer is poly-1,1,1-trimethylamine acrylimide.
Claim 9
Dependent Claim
14 words
A method as defined in claim 5 wherein said polymer is poly-1,1-dimethyl-1-(2-hydroxypropyl) amine methacrylimide.
Claim 10
Dependent Claim
35 words
The method as defined in claim 5 which further comprises: precipitating silver halide from said emulsion; removing soluble by-products from said silver halide; and redispersing said silver halide in a solution containing a bodying polymer.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |