US3841874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the photographic characteristics of vesicular photographic materials
Assignee: Xidex Corp
•
Filing: 1973-03-29
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Granted: 1974-10-15
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Expires: 1993-03-29
Abstract
Abstract Improvement of photographic characteristics of vesicular film such as an increase in its speed and a reduction in its gamma by contact of film prior to exposure with an alkanol having up to about three carbon atoms. Equivalent results are obtained by contact with acetonitrile where the film''s vehicle is a thermoplastic linear poly (hydroxy ether) polymer of an epihalohydrin and a dihydric phenol. In both cases where such treatment is followed by a second treatment with water an even greater improvement in photographic characteristics is obtained. Following treatment an equilibration period is required to permit solvent to be released from the film.
Inventors
- 👤 A Nishino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
159 words
IN THE METHOD FOR IMPROVING THE PHOTOGRAPHIC CHARACTERISTICS OF VESICULAR FILM COMPRISING A SYNTHETIC HYDROPHOBIC VEHICLE SUBSTANTIALLY RESISTANT TO PHYSICAL DEGRADATION BY LOWER ALKANOL SOLVENTS COATED AND DRIDED ON A SUPPORT, SAID VEHICLE BEING OF THE TYPE ADAPTED TO SERVE AS THE VEHICLE FOR A LIGHTSENSITIVE MATERIAL TO FORM VESICULAR IMAGES, A LIGHT-SENSITIVE MATERIAL SUBSTANTIALLY INFORMALLY DISPERSED IN SAID VEHICLE, SAID LIGHT-SENSITIVE MATERIAL BEING DECOMPOSABLE TO FORM NITROGEN GAS UPON IMAGEWISE EXPOSURE TO ACETINIC RADIATION, SAID FILM BEING HEAT DEVELOPABLE TO FORM VESICLES IN THE EXPOSED AREAS, THE IMPROVEMENT COMPRISING IMMERSING THE FILM PRIOR TO IMAGEWISE EXPOSURE IN A FLUID PHASE ALKANOL HAVING UP TO THREE CARBON ATOMS, AND THEREAFTER EQUILIBRATING SAID IMMERSED FILM PRIOR TO SAID IMAGEWISE EXPOSURE TO PERMIT RELEASE OF ALKANOL FROM THE FILM SO THAT LESS THAN ABOUT 1 PERCENT IS RETAINED THEREIN, THE TIME AND TEMPERATURE OF SAID IMMERSION AND THE TIME OF SAID EQUILIBRATION BEING SUFFICIENT TO INCREASE THE PHOTOSENSITIVITY OF THE FILM.
Claim 2
Dependent Claim
159 words
IN THE METHOD FOR IMPROVING THE PHOTOGRAPHIC CHARACTERISTICS OF VESICULAR FILM COMPRISING A SYNTHETIC HYDROPHOBIC VEHICLE SUBSTANTIALLY RESISTANT TO PHYSICAL DEGRADATION BY LOWER ALKANOL SOLVENTS COATED AND DRIDED ON A SUPPORT, SAID VEHICLE BEING OF THE TYPE ADAPTED TO SERVE AS THE VEHICLE FOR A LIGHTSENSITIVE MATERIAL TO FORM VESICULAR IMAGES, A LIGHT-SENSITIVE MATERIAL SUBSTANTIALLY INFORMALLY DISPERSED IN SAID VEHICLE, SAID LIGHT-SENSITIVE MATERIAL BEING DECOMPOSABLE TO FORM NITROGEN GAS UPON IMAGEWISE EXPOSURE TO ACETINIC RADIATION, SAID FILM BEING HEAT DEVELOPABLE TO FORM VESICLES IN THE EXPOSED AREAS, THE IMPROVEMENT COMPRISING IMMERSING THE FILM PRIOR TO IMAGEWISE EXPOSURE IN A FLUID PHASE ALKANOL HAVING UP TO THREE CARBON ATOMS, AND THEREAFTER EQUILIBRATING SAID IMMERSED FILM PRIOR TO SAID IMAGEWISE EXPOSURE TO PERMIT RELEASE OF ALKANOL FROM THE FILM SO THAT LESS THAN ABOUT 1 PERCENT IS RETAINED THEREIN, THE TIME AND TEMPERATURE OF SAID IMMERSION AND THE TIME OF SAID EQUILIBRATION BEING SUFFICIENT TO INCREASE THE PHOTOSENSITIVITY OF THE FILM.
Claim 3
Dependent Claim
13 words
The method in accordance with claim 1 wherein said fluid phase is liquid.
Claim 4
Dependent Claim
13 words
The method in accordance with claim 1 wherein said fluid phase is vapor.
Claim 5
Dependent Claim
13 words
The method in accordance with claim 1 wherein said alkanol is methyl alcohol.
Claim 6
Dependent Claim
13 words
A method in accordance with claim 1 wherein said alkanol is ethyl alcohol.
Claim 7
Dependent Claim
31 words
A method in accordance with claim 1 wherein said vesicular film has as its vehicle a film forming thermoplastic linear poly (hydroxy ether) polymer of an epihalohydrin and a dihydric phenol.
Claim 8
Dependent Claim
28 words
A method in accordance with claim 1 wherein said vesicular film has as its vehicle a copolymer of about 70-99 weight percent of a nitrile of the formula:
Claim 9
Dependent Claim
23 words
A method iN accordance with claim 1 and including the step of contacting said film with water after said contact with the alkanol.
Claim 10
Dependent Claim
26 words
A method in accordance with claim 1 wherein said contact with the alkanol is executed at a temperature of about 20*-60* C. for about 1-100 seconds.
Claim 11
Dependent Claim
23 words
A method in accordance with claim 8 wherein said contact with the water is executed at about 20*-90* C. for about 1-100 seconds.
Claim 12
Dependent Claim
35 words
A method in accordance with claim 8 wherein said contact with the alkanol is executed at about 20*-40* C., said contact with the water is executed at ambient temperature, and said alkanol is methyl alcohol.
Claim 13
Dependent Claim
18 words
A method in accordance with claim 6 wherein said vehicle is a polymer of epichlorohydrin and 2,2''-bis(p-hydroxyphenyl) propane.
Claim 14
Dependent Claim
18 words
A method in accordance with claim 7 wherein said vehicle is a polymer of methacrylonitrile and 2-hydroxyethyl 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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |