Patent US4087383A successfully refreshed from Google Patents.
US3674745A
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Novel light-sensitive copolyesters
Assignee: Eastman Kodak Co
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Filing: 1970-03-12
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Granted: 1972-07-04
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Expires: 1990-03-12
Abstract
Abstract There is described a novel group of light-sensitive copolyesters prepared by condensing at least one dihydroxy compound with a mixture of diacids comprising more than 70 and less than 95 mole percent of a diacid having the formula: WHERE R is an alkylidene, aralkylidene or heterocyclic group and less than 30 but more than 5 mole percent of a non-lightsensitive aromatic diacid.
Inventors
- 👤 Georges A Phlipot
- 👤 Marie-Jose-Suzanne Michiels
- 👤 Yolande-Paule Marie Villeneuve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; C; C08; C08F; C08F283/00; C08F283/01; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
A copolyester of claim 1 wherein the dihydroxy compound is an alkylene glycol having two to 12 carbon atoms.
Claim 2
Dependent Claim
24 words
A copolyester of claim 1 wherein the non-light-sensitive aromatic diacid comprises 10 mole percent or less of the diacids, the remainder being light-sensitive diacids.
Claim 3
Dependent Claim
25 words
A copolyester of claim 1, wherein the non-light-sensitive aromatic diacid is terephthalic acid, and the dihydroxy compound is a mixture of ethylene glycol and 1,4-butanediol.
Claim 4
Dependent Claim
26 words
A copolyester of claim 1, wherein the non-light-sensitive aromatic diacid is terephthalic acid, and the dihydroxy compound is a mixture of ethylene glycol, 1,4-butanediol, and cyclohexanedimethanol.
Claim 5
Dependent Claim
96 words
A light-sensitive copolyester condensation product of at least one dihydroxy compound selected from the group consisting of ethylene glycol, 1,4-butanediol, cyclohexanediol and mixtures thereof with a mixture of diacids or derivatives thereof, more than 70 and less than 95 mole percent of the diacids being a light sensitive diacid selected from the group consisting of cinnamylidene malonic acid and low alkyl esters thereof and less than 30 but more than 5 mole percent of the diacids being non-light sensitive aromatic diacid selected from the group consisting of terephthalic acid, isophthalic acid and lower alkyl esters thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |