US3746548A
Expired / Lapsed
US
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Silver halide emulsion with graft copolymer binders
Assignee: Polaroid Corp
•
Filing: 1971-10-08
•
Granted: 1973-07-17
•
Expires: 1991-10-08
Abstract
Abstract A photosensitive silver halide emulsion wherein the emulsion binder comprises a graft copolymer of an amine acrylamide monomer on a polymer containing a plurality of hydroxyl groups.
Inventors
- 👤 M Fitzgerald
- 👤 L Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:03
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
19 words
The product as defined in claim 1 wherein said graft copolymer comprises 5-75 mole percent of said amine acrylamide.
Claim 3
Dependent Claim
17 words
The product as defined in claim 1 wherein said silver halide emulsion is a silver iodobromide emulsion.
Claim 4
Dependent Claim
17 words
The product as defined in claim 1 wherein said emulsion includes at least one chemical sensitizing agent.
Claim 5
Dependent Claim
17 words
The product as defined in claim 1 wherein said emulsion includes at least one optical sensitizing agent.
Claim 6
Dependent Claim
17 words
The product as defined in claim 1 wherein said graft copolymer includes a second ethylenically unsaturated monomer.
Claim 7
Dependent Claim
16 words
The product as defined in claim 7 wherein said amine acrylamide is N-( Beta -(dimethylamino)ethyl) acrylamide.
Claim 8
Dependent Claim
13 words
The product as defined in claim 7 wherein said second monomer is acrylamide.
Claim 9
Dependent Claim
13 words
The product as defined in claim 7 wherein said second monomer is N-isopropylacrylamide.
Claim 10
Dependent Claim
13 words
The product as defined in claim 7 wherein said second monomer is acrylamidoacetamide.
Claim 11
Dependent Claim
15 words
The product as defined in claim 1 wherein said hydroxyl containing polymer is polyvinyl alcohol.
Claim 12
Dependent Claim
14 words
The product as defined in claim 1 wherein said emulsion includes a bodying polymer.
Claim 13
Dependent Claim
13 words
The product as defined i claim 1 wherein said bodying polymer is gelatin.
Claim 14
Dependent Claim
14 words
The product as defined in claIm 14 wherein said bodying polymer is polyvinyl alcohol.
Claim 15
Dependent Claim
14 words
The product as defined in claim 14 wherein said bodying polymer is hydroxyethyl cellulose.
Claim 16
Independent Claim
36 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 graft copolymer of an amine acrylamide of the formula:
Claim 17
Dependent Claim
17 words
The method as defined in claim 17 wherein said graft copolymer includes a second ethylenically unsaturated monomer.
Claim 18
Dependent Claim
16 words
The method as defined in claim 18 wherein said amine acrylamide is N-( Beta -(dimethylamino)ethyl) acrylamide.
Claim 19
Dependent Claim
13 words
The method as defined in claim 18 wherein said second monomer is acrylamide.
Claim 20
Dependent Claim
13 words
The method as defined in claim 18 wherein said second monomer is N-isopropylacrylamide.
Claim 21
Dependent Claim
13 words
The method as defined in claim 18 wherein said second monomer is acrylamidoacetamide.
Claim 22
Dependent Claim
15 words
The method as defined in claim 17 wherein said hydroxyl containing polymer is polyvinyl alcohol.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |