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Patent US3580886A successfully refreshed from Google Patents.
US3580886A
Expired / Lapsed
US
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Polyesters stabilized with aromatic isocyanates
Assignee: FMC Corp
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Filing: 1968-06-05
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Granted: 1971-05-25
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Expires: 1988-06-05
Abstract
Abstract A THERMAL STABILIZED POLYESTER COMPRISING A HIGHLY POLYMERIC LINEAR POLYESTER CONTAINING A STABILIZING AMOUNT OF AN AROMATIC MONO- OR POLYISOCYANATE.
Inventors
- 👤 Mary J Stewart
- 👤 John A Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4213; C08K; C08K5/00; C08K5/16; C08K5/29
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |