Patent US4266015A successfully refreshed from Google Patents.
US4266015A
Expired / Lapsed
US
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Light sensitive materials with fluorinated polymer antistats
Assignee: 3M Co
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Filing: 1977-09-13
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Granted: 1981-05-05
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Expires: 1997-09-13
Abstract
Abstract Light sensitive elements containing silver halide emulsions can be desensitized to static charge marking by the addition of fluorine-containing polymers of a defined class.
Inventors
- 👤 Louis Butler
- 👤 Paul H. Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
A light sensitive material which includes a support, at least one layer of a photographic silver halide emulsion on at least one face of the support, and (1) as an outer layer over said layer of emulsion on at least one face of the support, a top coat comprising at least 2% by weight of (1) a fluorine-containing homopolymer or (2) a fluorine-containing copolymer with ethylenically unsaturated comonomers which has been derived from at least 2% by weight of reactants of a fluorine-substituted alkyl ester of an ethylenically unsaturated carboxylic acid wherein there are no more than one H or Cl per two carbon atoms on the fluorinated alkyl group and no more than one skeletal O or N per two carbon atoms on the fluorinated alkyl group or (2) said fluorine-containing polymer being present in at least one emulsion layer on at least one face of the support or in another layer intermediate the top coat and at least one face of the support.
Claim 2
Dependent Claim
165 words
A light sensitive material which includes a support, at least one layer of a photographic silver halide emulsion on at least one face of the support, and (1) as an outer layer over said layer of emulsion on at least one face of the support, a top coat comprising at least 2% by weight of (1) a fluorine-containing homopolymer or (2) a fluorine-containing copolymer with ethylenically unsaturated comonomers which has been derived from at least 2% by weight of reactants of a fluorine-substituted alkyl ester of an ethylenically unsaturated carboxylic acid wherein there are no more than one H or Cl per two carbon atoms on the fluorinated alkyl group and no more than one skeletal O or N per two carbon atoms on the fluorinated alkyl group or (2) said fluorine-containing polymer being present in at least one emulsion layer on at least one face of the support or in another layer intermediate the top coat and at least one face of the support.
Claim 3
Dependent Claim
18 words
A material as claimed in claim 1 which has a top coat consisting essentially of the fluorine-containing polymer.
Claim 4
Dependent Claim
35 words
A material as claimed in claim 1 which has a top coating consisting essentially of a mixture of gelatin and at least 2% by weight of said fluorine-containing polymer the latter being compatible with gelatin.
Claim 5
Dependent Claim
39 words
A material as claimed in claim 3 in which the fluorine-containing polymer is a homopolymer and constitutes from 2 to 90% by weight of the total weight of the top coat and gelatin comprises the remaining 98 to 10%.
Claim 6
Dependent Claim
27 words
A material as claimed in claim 1 in which the top coat comprises the fluorine-containing polymer in the form of a dried latex in a gelatin layer.
Claim 7
Dependent Claim
16 words
A material as claimed in claim 1 in which the fluorine-containing polymer has terminal perfluoroalkyl groups.
Claim 8
Dependent Claim
37 words
A material as claimed in claim 1 in which the fluorine containing polymer has been formed from a monomer having the general formula: CH.sub.2 ═CHCOOCH.sub.2 C.sub.n F.sub.2n+1 in which n is an integer from 3 to 9.
Claim 9
Dependent Claim
16 words
A material as claimed in claim 1 in which the fluorine containing polymer is poly(hexafluoroisopropyl acrylate).
Claim 10
Dependent Claim
14 words
A material as claimed in claim 1 in which the fluorine-containing polymer is poly(2,2,3,3,4,4,4,-heptafluoro-n-butyl-acrylate).
Claim 11
Dependent Claim
15 words
A material as claimed in claim 1 in which the fluorine-containing polymer is poly(1,1-dihydroperfluorooctyl methacrylate).
Claim 12
Dependent Claim
32 words
A material as claimed in claim 1 in which the fluorine-containing polymer has been formed from a monomer having the general formula: ##STR2## where n is an integer from 3 to 9.
References Cited (Backward Citations)
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |