Patent US4350759A successfully refreshed from Google Patents.
US4350759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Allyl amine polymeric binders for photographic emulsions
Assignee: Polaroid Corp
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Filing: 1981-03-30
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Granted: 1982-09-21
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Expires: 2001-03-30
Abstract
Abstract A photosensitive silver halide emulsion wherein the emulsion binder comprises an allyl amine polymer or copolymer.
Inventors
- 👤 Maurice J. Fitzgerald
- 👤 Thomas E. Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A photosensitive silver halide emulsion comprising silver halide crystals disposed in an emulsion binder comprising an allylamine copolymer having repeating units of the general formula: ##STR20## wherein R 2 is hydrogen, methyl, or chloro; and R 5 and R 6 are independently selected from hydrogen and methyl, or are chemically joined to form a 6 membered heterocyclic ring structure.
Claim 2
Dependent Claim
59 words
A photosensitive silver halide emulsion comprising silver halide crystals disposed in an emulsion binder comprising an allylamine copolymer having repeating units of the general formula: ##STR20## wherein R 2 is hydrogen, methyl, or chloro; and R 5 and R 6 are independently selected from hydrogen and methyl, or are chemically joined to form a 6 membered heterocyclic ring structure.
Claim 3
Dependent Claim
34 words
The photosensitive silver halide emulsion of claim 1 wherein the allylamine repeating unit of said copolymer is from an allylamine monomer selected from the group consisting of: N,N-dimethylallylamine; N-(2-chloroallyl) morpholine; N-(2-chloroallyl) piperidine; and methallylamine.
Claim 4
Dependent Claim
13 words
The photosensitive silver halide emulsion of claim 2 wherein said monomer is N,N-dimethylallylamine.
Claim 5
Dependent Claim
14 words
The photosensitive silver halide emulsion of claim 2 wherein said monomer is N-(2-chloroallyl) morpholine.
Claim 6
Dependent Claim
14 words
The photosensitive silver halide emulsion of claim 2 wherein said monomer is N-(2-chloroallyl) piperidine.
Claim 7
Dependent Claim
13 words
The photosensitive silver halide emulsion of claim 2 wherein said monomer is methallylamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |