Patent US3642479A successfully refreshed from Google Patents.
US3642479A
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Photographic element and process
Assignee: Eastman Kodak Co
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Filing: 1970-03-02
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Granted: 1972-02-15
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Expires: 1990-03-02
Abstract
Abstract Photographic elements having a support on which is coated a layer including a light-sensitive halocarbon and a 1,4-pyran derivative like 1-(p-N,N-dimethylaminophenyl)-1H-3-(pethoxyphenyl)naphtho(2,1-b)pyran or 4-(p-N,Ndimethylaminophenyl)-2-phenyl-4H-1-benzo(b)pyran yield printout images in exposed areas on exposure to actinic rays. The resultant printout image can be intensified by heating.
Inventors
- 👤 James A Van Allan
- 👤 Dennis E De Meyer
- 👤 Frank D Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/60; C07D311/78; C07D311/92; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
A photographic element as described in claim 1 wherein the halocarbon compound is selected from the group consisting of halocarbon and polyhalocarbon compounds and wherein the 4H-pyran derivative has the formula:
Claim 2
Dependent Claim
38 words
A photographic element as described in claim 2 wherein R represents a radical selected from the group consisting of a hydrogen atom, a methyl radical, an N,N-dimethylaminophenyl radical, and a p-methylphenylthio radical and R1 represents a phenyl radical.
Claim 3
Dependent Claim
19 words
A photographic element as described in claim 2 wherein R2 and R3, when taken together, represent a 1,4-but-1,3-dienylene radical.
Claim 4
Dependent Claim
56 words
A photographic element as described in claim 3 wherein the methyl radical represented by R is selected from the group consisting of a 1-ethoxycarbonyl-1-cyanomethyl radical, a 1-ethoxycarbonyl-1-benzoylmethyl radical and a nitromethyl radical and the phenyl radical represented by R1 is selected from the group consisting of a phenyl radical, a p-ethoxyphenyl radical and a p-dimethylaminophenyl radical.
Claim 5
Dependent Claim
40 words
A photographic element for the production of printout images and comprising a support having coated thereon a layer comprising a halocarbon selected from the group consisting of carbon tetrabromide and dichloroethane and a 4H-pyran derivative as described in claim 3.
Claim 6
Dependent Claim
68 words
A photographic element for the production of printout images and comprising a support having coated thereon a layer comprising a carbon tetrabromide and a 4H-pyran derivative selected from the group consisting a. 1-(p-N,N-dimethylaminophenyl)1H-3-(p-ethoxyphenyl)naptho (2, 1-b)pyran b. 4-(p-N,N-dimethlaminophenyl)-2-phenyl-4H-1-benzo(b)pyran c. 1H-3-(p-N,N-dimethylaminophenyl)naphtho(2,1-b)-pyran d. 1-(p-tolylthio)-1H-3-(p-ethoxyphenyl)naphtho-(2,1-b)pyran e. 1-(1-ethoxycarbonyl-1-cyanomethyl)-1H-3-(p-ethoxyphenyl)naphtho(2,1-b)pyran f. 4-(1-ethoxycarbonyl-1-cyanomethyl)-2-phenyl-4H-benzo(b)pyran g. 1-(1-ethoxycarbonyl-1-bEnzoylmethyl)-1H-3-(p-ethoxyphenyl)naphtho(2,1 -b)pyran h. 1-nitromethyl-1H-3-(p-(N,N-dimethylamino)phenyl)-naphtho(2,1-b)pyran, said pyran and said carbon tetrabromide being combined in a weight ratio of from 3:1 to 1:5 respectively.
Claim 7
Dependent Claim
38 words
A photographic image-forming process for the preparation of printout images on a photographic element as described in claim 1, which process comprises imagewise exposing said element to actinic rays, whereupon a printout image is produced in exposed ares.
Claim 8
Dependent Claim
21 words
A photographic image-forming process as described in claim 8 and additionally including heating said exposed element to intensify the printout image.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |