Patent US3861918A successfully refreshed from Google Patents.
US3861918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic silver halide emulsion binder
Assignee: Polaroid Corp
•
Filing: 1973-03-09
•
Granted: 1975-01-21
•
Expires: 1993-03-09
Abstract
Abstract A photosensitive silver halide emulsion wherein the emulsion binder comprises a halogenated styrene polymer.
Inventors
- 👤 Maurice J Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
18 words
The product as defined in claim 1 wherein said polymer comprises 1-80 mole percent of said repeating units.
Claim 2
Dependent Claim
17 words
The product as defined in claim 1 wherein said silver halide emulsion is a silver iodobromide emulsion.
Claim 3
Dependent Claim
17 words
The product as defined in claim 1 wherein said emulsion includes at least one chemical sensitizing agent.
Claim 4
Dependent Claim
17 words
The product as defined in claim 1 wherein said emulsion includes at least one optical sensitizing agent.
Claim 5
Dependent Claim
13 words
The product as defined in claim 1 wherein said first monomer is p-fluorostyrene.
Claim 6
Dependent Claim
13 words
The product as defined in claim 1 wherein said first monomer is o-chlorostyrene.
Claim 7
Dependent Claim
13 words
The product as defined in claim 1 wherein said first monomer is p-chlorostyrene.
Claim 8
Dependent Claim
13 words
The product as defined in claim 1 wherein said first monomer is o-iodostyrene.
Claim 9
Dependent Claim
13 words
The product as defined in claim 1 wherein said first monomer is 2,3,4,5,6-pentafluorostyrene.
Claim 10
Dependent Claim
13 words
The product as defined in claim 1 wherein said first monomer is 2-(pentafluorophenyl)-1-propene.
Claim 11
Dependent Claim
56 words
In a method of preparing a photosensitive silver halide emulsion wherein a water-soluble silver salt is reacted with a water-soluble halide salt in an aqueous solution of a silver halide peptizer, the improvement which comprises: peptizing said silver halide emulsion with a water-soluble, film-forming copolymer consisting of repeating units of a first monomer of the formula:
Claim 12
Dependent Claim
13 words
The method as defined in claim 12 wherein said first monomer is p-fluorostyrene.
Claim 13
Dependent Claim
13 words
The method as defined in claim 12 wherein said first monomer is o-chlorostyrene.
Claim 14
Dependent Claim
13 words
The method as defined in claim 12 wherein said first monomer is p-chlorostyrene.
Claim 15
Dependent Claim
13 words
The method as defined in claim 12 wherein said first monomer is o-iodostyrene.
Claim 16
Dependent Claim
13 words
The product as defined in claim 12 wherein said first monomer is 2,3,4,5,6-pentafluorostyrene.
Claim 17
Dependent Claim
13 words
The product as defined in claim 12 wherein said first monomer is 2-(pentafluorophenyl)-1-propene.
Claim 18
Dependent Claim
35 words
The method as defined in claim 17 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.
Claim 19
Dependent Claim
14 words
The method as defined in claim 19 wherein said bodying polymer is polyvinyl alcohol.
Claim 20
Dependent Claim
13 words
The method as defined in claim 19 wherein said bodying polymer is gelatin.
References Cited (Backward Citations)
US2473549A
Cited
US2772166A
Cited
US2831767A
Cited
US2852382A
Cited
US3168403A
Cited
US3203804A
Cited
US3516830A
Cited
US3512985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |