US3660356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester amide elastomers containing polyether units
Assignee: Huels AG
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Filing: 1970-04-23
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Granted: 1972-05-02
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Expires: 1990-04-23
Abstract
Abstract HIGH MOLECULAR WEIGHT LINEAR POLYESTER AMIDE ELASTOMERS OBTAINED BY POLYCONDENSING AMIDE GROUPS CONTAINING DICARBOXYLIC ACID ESTERS, OPTIONALLY TOGETHER WITH NORMAL DICARBOXYLIC ACID ESTERS, WITH LINEAR ALIPHATIC POLYETHER DIOLS. THE ELASTOMERS ARE PROCESSABLE TO OBTAIN FILMS AND FIBERS.
Inventors
- 👤 Eduard Radlmann
- 👤 Gunther Nischek
- 👤 Lothar Ruetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856; C08G69/00; C08G69/44; Y; Y10; Y10S; Y10S525/00; Y10S525/926
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |