US3651014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented thermoplastic copolyester elastomers
Assignee: EIDP Inc
•
Filing: 1970-06-22
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Granted: 1972-03-21
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Expires: 1990-06-22
Abstract
Abstract A SEGMENTED THERMOPLASTIC COPOLYESTER ELASTOMER CONTAINNG RECURRING POLYMERIC LONG CHAIN ESTER UNITS, DERIVED FROM DIACARBOXLIC ACIDS AND LONG CHAIN GLYCOLS AND SHORT CHAIN ESTER UNITS DERIVED FROM DICARBOXYLIC ACIDS AND LOW MOLECULAR WEIGHT DIOLS. ABOUT 50-90% OF THE TOTAL NUMBER OF SHORT CHAIN ESTER UNTIS MUST BE DERIVED FROM A SINGLE DICARBOXYLIC ACID AND A SINGLE LOW MOLECULAR WEIGHT DIOL. THE ELASTOMERS HAVE EXCEPTIONAL PROPERTIES, PARTICULARLY TEAR-STRENGTH, ABRASION RESISTANCE AND RESISTANCE TO OIL SWELL.
Inventors
- 👤 William K Witsiepe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0005; C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 0
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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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |