US3583944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inactivating carboxyl end groups in polyesters
Assignee: Goodyear Tire and Rubber Co
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Filing: 1969-11-03
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Granted: 1971-06-08
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Expires: 1989-11-03
Abstract
Abstract THE CARBOXYL NUMBER OF POLYESTERS IS REDUCED BY REACTING THE HIGH POLYMER IN COMMINUTED FILM AND FIBERFORM WITH A MINOR STABILIZING QUANITY OF CERTAIN CYCLICAND/OR ACYCLIC KETENE ACETALS SUCH AS 2-METHYLENE-1,3 DIOXOALNE.
Inventors
- 👤 Albert R Sawata
- 👤 Jack D Hauenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/916
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |