US3198769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear 1, 3-cyclopentanedimethanol polyesters of bis-phenylene-4, 4'-dicarboxylic acids
Assignee: EIDP Inc
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Filing: 1962-08-28
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Granted: 1965-08-03
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Macon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:16
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A LINEAR CONDENSATION POLYESTER OF DIHYDROXY AND DICARBOXYLIC BIFUNCTIONAL COMPONENTS WHEREIN GREATER THAN 90% OF THE RECURRING STRUCTURAL ESTER UNITS ARE 1,3CYCLOPENTANEDIMETHANOL ESTERS OF A BIS-PHENYLENE-4,4''DICARBOXYLIC ACID, SAID ACID BEING ESSENTIALLY HYDROCARBON EXCEPT FOR THE TWO CARBOXYL GROUPS AND OF 8 TO 14 CARBON ATOMS, THE POLYESTER HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.3 AS MEASURED IN A MIXTURE OF 1 PART TRIFLUOROACETIC ACID AND 3 PARTS METHYLENE CHLORIDE BY VOLUME AT 25*C., AND HAVING A POLYMER MELTING TEMPERATURE BETWEEN ABOUT 200* AND 325*C.
Claim 2
Dependent Claim
85 words
A LINEAR CONDENSATION POLYESTER OF DIHYDROXY AND DICARBOXYLIC BIFUNCTIONAL COMPONENTS WHEREIN GREATER THAN 90% OF THE RECURRING STRUCTURAL ESTER UNITS ARE 1,3CYCLOPENTANEDIMETHANOL ESTERS OF A BIS-PHENYLENE-4,4''DICARBOXYLIC ACID, SAID ACID BEING ESSENTIALLY HYDROCARBON EXCEPT FOR THE TWO CARBOXYL GROUPS AND OF 8 TO 14 CARBON ATOMS, THE POLYESTER HAVING AN INTRINSIC VISCOSITY OF AT LEAST 0.3 AS MEASURED IN A MIXTURE OF 1 PART TRIFLUOROACETIC ACID AND 3 PARTS METHYLENE CHLORIDE BY VOLUME AT 25*C., AND HAVING A POLYMER MELTING TEMPERATURE BETWEEN ABOUT 200* AND 325*C.
References Cited (Backward Citations)
US3007900A
Cited
US3008933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |