Patent US3816129A successfully refreshed from Google Patents.
US3816129A
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Synthetic silver halide emulsion binder
Assignee: Polaroid Corp
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Filing: 1973-01-02
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Granted: 1974-06-11
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Expires: 1993-01-02
Abstract
Abstract A photosensitive silver halide emulsion wherein the emulsion binder comprises a graft copolymer of a quaternary ammonium alkyl acrylate salt on a polyhydroxy-substituted polymer.
Inventors
- 👤 M Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F291/00; C08F291/06; C08F291/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
18 words
The product as defined in claim 1 wherein substantially all of said emulsion binder comprises said graft copolymer.
Claim 2
Dependent Claim
21 words
The product as defined in claim 1 wherein said graft copolymer comprises about 5 to 75 mole percent of said monomer.
Claim 3
Dependent Claim
19 words
The product as defined in claim 3 wherein said graft copolymer comprises about 20 mole percent of said monomer.
Claim 4
Dependent Claim
17 words
The product as defined in claim 1 wherein said silver halide emulsion is a silver iodobromide emulsion.
Claim 5
Dependent Claim
17 words
The product as defined in claim 1 wherein said emulsion includes at least one chemical sensitizing agent.
Claim 6
Dependent Claim
17 words
The product as defined in claim 1 wherein said emulsion includes at least one optical sensitizing agent.
Claim 7
Dependent Claim
14 words
THe product as defined in claim 1 wherein said monomer is 3-(methacryloyloxy-2-hydroxyprop-1-yl trimethylammonium chloride.
Claim 8
Dependent Claim
15 words
The product as defined in claim 1 wherein said monomer is Beta -(methacryloyloxy)ethyl trimethylammoniummethyl sulfate.
Claim 9
Dependent Claim
14 words
The product as defined in claim 1 wherein said polyhydroxy-substituted polymer is polyvinyl alcohol.
Claim 10
Dependent Claim
17 words
The product as defined in claim 1 wherein said graft copolymer includes a second ethylenically unsaturated monomer.
Claim 11
Dependent Claim
13 words
The product as defined in claim 11 wherein said second monomer is acrylamide.
Claim 12
Dependent Claim
14 words
The product as defined in claim 11 wherein said second monomer is N-isopropyl acrylamide.
Claim 13
Dependent Claim
14 words
The product as defined in claim 1 wherein said emulsion includes a bodying polymer.
Claim 14
Dependent Claim
13 words
The product as defined in claim 14 wherein said bodying polymer is gelatin.
Claim 15
Dependent Claim
14 words
The product as defined in claim 14 wherein said bodying polymer is polyvinyl alcohol.
Claim 16
Independent Claim
43 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 graft copolymer of a polyhydroxy-substituted polymer having grafted thereon a monomer of the formula:
Claim 17
Dependent Claim
14 words
The method as defined in claim 17 wherein said monomer is 3-(methacryloyloxy)-2-hydroxyprop-1-yl trimethylammonium chloride.
Claim 18
Dependent Claim
16 words
The method as defined in claim 17 wherein said monomer is Beta -(methacryloyloxy)ethyl trimethylammonium methyl sulfate.
Claim 19
Dependent Claim
14 words
The method as defined in claim 17 wherein said polyhydroxy-substituted polymer is polyvinyl alcohol.
Claim 20
Dependent Claim
17 words
The method as defined in claim 17 wherein said graft copolymer includes a second ethylenically unsaturated monomer.
Claim 21
Dependent Claim
13 words
The method as defined in claim 21 wherein said second monomer is acrylamide.
Claim 22
Dependent Claim
14 words
The method as defined in claim 20 wherein said second monomer is N-isopropyl acrylamide.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |