Patent US3220977A successfully refreshed from Google Patents.
US3220977A
Expired / Lapsed
US
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Linear polyesters from 4,4'-(cyclohexylmethylene)diphenols
Assignee: Eastman Kodak Co
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Filing: 1961-09-14
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Granted: 1965-11-30
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Winston J Jackson
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:09
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C07; C07C; C07C45/00; C07C45/49; C07C45/50; C07C45/61; C07C45/62; C07C45/67; C07C45/68; C07C45/69; C07C47/00; C07C47/28; C07C47/32; C07C47/38; C07C47/42; C07C47/453
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A HIGHLY POLYMERIC LINEAR CONDENSATION POLYESTER HAVING AN INHERENT VISCOSITY OF A LEAST 0.4, BEING SOLUBLE IN METHYLENE CHLORIDE, SAID POLYESTER CONSISTING ESSENTIALLY OF BIFUNCTIONAL CONSTITUENTS AS FOLLOWS: (A) FROM ONE TO TWO DICARBOXYLIC ACIDS SELECTED FROM THE GROUPS CONSISTING OF THE ISOMERS OF PHTHALIC ACID, THE ISOMERS OF CYCLOHEXANE-1,4-DICARBOXYLIC ACID, AND ALIPHATIC ACIDS SOLELY COMPOSED OF OXYGEN, HYDROGEN AND CARBON ATOMS, AND (B) A DIOL CONSISTING ESSENTIALLY OF ABISPHENOL HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
75 words
A HIGHLY POLYMERIC LINEAR CONDENSATION POLYESTER HAVING AN INHERENT VISCOSITY OF A LEAST 0.4, BEING SOLUBLE IN METHYLENE CHLORIDE, SAID POLYESTER CONSISTING ESSENTIALLY OF BIFUNCTIONAL CONSTITUENTS AS FOLLOWS: (A) FROM ONE TO TWO DICARBOXYLIC ACIDS SELECTED FROM THE GROUPS CONSISTING OF THE ISOMERS OF PHTHALIC ACID, THE ISOMERS OF CYCLOHEXANE-1,4-DICARBOXYLIC ACID, AND ALIPHATIC ACIDS SOLELY COMPOSED OF OXYGEN, HYDROGEN AND CARBON ATOMS, AND (B) A DIOL CONSISTING ESSENTIALLY OF ABISPHENOL HAVING THE FOLLOWING GENERAL FORMULA:
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |