US3852073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions comprising polymeric peptizers
Assignee: Polaroid Corp
•
Filing: 1972-10-04
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Granted: 1974-12-03
•
Expires: 1992-10-04
Abstract
Abstract WHEREIN: R1 is hydrogen, lower alkyl such as methyl, ethyl or halogen; R2 is hydrogen, lower alkyl, such as methyl or ethyl, cyano or halogen; R3 is lower alkyl, or lower cycloalkyl; R4 and R5 are each hydrogen, lower alkyl, or lower cycloalkyl; R3 and/or R4 and/or R5 may be chemically joined to form a ring structure; and x is a positive integer greater than 1. A photosensitive silver halide emulsion wherein the emulsion binder comprises a water-soluble polymer having in its molecule repeating units of the structure which may be represented by the general formula:
Inventors
- 👤 M Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
24 words
A PHOTOSENSITIVE SILVER HALIDE EMULSION WHEREIN THE SILVER HALIDE PEPTIZER COMPRISES A WATER-SOLUBLE HOMOPOLYMER HAVING IN ITS MOLECULE REPEATING UNITS WITH THE GENERAL FORMULA:
Claim 2
Dependent Claim
24 words
A PHOTOSENSITIVE SILVER HALIDE EMULSION WHEREIN THE SILVER HALIDE PEPTIZER COMPRISES A WATER-SOLUBLE HOMOPOLYMER HAVING IN ITS MOLECULE REPEATING UNITS WITH THE GENERAL FORMULA:
Claim 3
Dependent Claim
13 words
The product of claim 1 wherein R4 and R5 are each lower alkyl.
Claim 4
Dependent Claim
17 words
The product of claim 1 wherein substantially all of said silver halide peptizer consists of said homopolymer.
Claim 5
Dependent Claim
15 words
The product of claim 1 wherein said silver halide emulsion is a silver iodobromide emulsion.
Claim 6
Dependent Claim
15 words
The product of claim 1 wherein said emulsion includes at least one chemical sensitizing agent.
Claim 7
Dependent Claim
15 words
The product of claim 1 wherein said emulsion includes at least one optical sensitizing agent.
Claim 8
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl methacrylate.
Claim 9
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl methacrylate.
Claim 10
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl acrylate.
Claim 11
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl acrylate.
Claim 12
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting esssentially of units of acrylamide and Beta -(diethylamino) ethyl acrylate.
Claim 13
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting esssentially of units of acrylamide and Beta -(diethylamino) ethyl acrylate.
Claim 14
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(diethylamino) ethyl methacrylate.
Claim 15
Dependent Claim
24 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(diethylamino) ethyl methacrylate.
Claim 16
Dependent Claim
25 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(tertiary butylamino) ethyl methacrylate.
Claim 17
Dependent Claim
25 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of acrylamide and Beta -(tertiary butylamino) ethyl methacrylate.
Claim 18
Dependent Claim
16 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises poly Beta -(dimethylamino) ethyl acrylate.
Claim 19
Dependent Claim
16 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises poly Beta -(dimethylamino) ethyl acrylate.
Claim 20
Dependent Claim
16 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises poly Beta -(dimethylamino) ethyl methacrylate.
Claim 21
Dependent Claim
16 words
A photosensitive silver halide emulsion wherein the silver halide peptizer comprises poly Beta -(dimethylamino) ethyl methacrylate.
Claim 22
Dependent Claim
24 words
A photographic silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of a first monomer of the formula:
Claim 23
Dependent Claim
24 words
A photographic silver halide emulsion wherein the silver halide peptizer comprises a copolymer consisting essentially of units of a first monomer of the formula:
Claim 24
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 of a silver halide peptizer comprising a homopolymer having in its molecule repeating units with the general formula:
Claim 25
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 of a silver halide peptizer comprising a homopolymer having in its molecule repeating units with the general formula:
Claim 26
Dependent Claim
14 words
The method of claim 15 wherein said peptizer is poly Beta -(dimethylamino) ethyl acrylate.
Claim 27
Dependent Claim
14 words
The method of claim 15 wherein said peptizer is poly Beta -(dimethylamino) ethyl methacrylate.
Claim 28
Independent Claim
44 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 of a silver halide peptizer comprising a copolymer consisting essentially of units of a first monomer of the formula:
Claim 29
Independent Claim
44 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 of a silver halide peptizer comprising a copolymer consisting essentially of units of a first monomer of the formula:
Claim 30
Dependent Claim
23 words
The method of claim 18 wherein said polymer is a copolymer of consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl methacrylate.
Claim 31
Dependent Claim
22 words
The method of claim 18 wherein said peptizer is a copolymer consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl acrylate.
Claim 32
Dependent Claim
22 words
The method of claim 18 wherein said peptizer is a copolymer consisting essentially of units of acrylamide and Beta -(dimethylamino) ethyl acrylate.
Claim 33
Dependent Claim
22 words
The method of claim 18 wherein said peptizer is a copolymer consisting essentially of units of acrylamide and Beta -(diethylamino) ethyl methacrylate.
Claim 34
Dependent Claim
23 words
The method of claim 18 wherein said peptizer is a copolymer consisting essentially of units of acrylamide and Beta -(tertiary butylamino) ethyl methacrylate.
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |