Patent US4272603A successfully refreshed from Google Patents.
US4272603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin blends for improved vesicular systems
Assignee: Individual
•
Filing: 1979-11-06
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Granted: 1981-06-09
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Expires: 1999-11-06
Abstract
Abstract A vesicular photographic material comprising a polymeric matrix containing a sensitizer which liberates gas when exposed to light, and a process for manufacture of said material. The polymeric matrix comprises a blend of polymethacrylonitrile homopolymer with another resin selected from the group consisting of vinyl polymers and copolymers; epoxy polymers; and copolymers with polyurethane segments. Improved photometrics, particularly film speed, are realized.
Inventors
- 👤 Donald J. Chenevert
- 👤 John R. Grawe
- 👤 John C. McDaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/60
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
In a light-sensitive vesicular material comprising a thermoplastic resin vehicle coated onto a polyethylene terephthalate backing in which is dispersed a photosensitive compound which is capable of decomposing to yield nitrogen gas when exposed to actinic radiation, said vehicle consisting of a blended polymer admixture of a homopolymer of methacrylonitrile and a copolymer of vinylidene chloride and acrylonitrile having 60-90% by weight vinylidene chloride which is compatible with said homopolymer of methacrylonitrile wherein the amount of said copolymer is greater than 50% by weight of the total weight of the blended polymers.
Claim 2
Dependent Claim
92 words
In a light-sensitive vesicular material comprising a thermoplastic resin vehicle coated onto a polyethylene terephthalate backing in which is dispersed a photosensitive compound which is capable of decomposing to yield nitrogen gas when exposed to actinic radiation, said vehicle consisting of a blended polymer admixture of a homopolymer of methacrylonitrile and a copolymer of vinylidene chloride and acrylonitrile having 60-90% by weight vinylidene chloride which is compatible with said homopolymer of methacrylonitrile wherein the amount of said copolymer is greater than 50% by weight of the total weight of the blended polymers.
Claim 3
Dependent Claim
20 words
A light-sensitive vesicular material as set forth in claim 1 wherein said methacrylonitrile homopolymer has a molecular weight below 500,000.
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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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |