Patent US3560439A successfully refreshed from Google Patents.
US3560439A
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Saturated copolyester resins containing a minor amount of structural units derived from 2 - hydroxy - 5 - methoxy isophthalic acid
Assignee: FMC Corp
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Filing: 1968-08-09
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Granted: 1971-02-02
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Expires: 1988-08-09
Abstract
Abstract A HIGHLY POLYMERIC LINEAR COPOLYESTER MADE BY THE MELT POLYMERIZATION OF REACTANTS COMPRISING: (A) AN AROMATIC DICARBOXYLIC ACID OR A LOWER ALKYL DI-ESTER THEREOF, (B) A DIOL, AND (C) 2-HYDROXY-5-METHOXY ISOPHTHALIC ACID OR A LOWER ALKYL DIESTER THEROF.
Inventors
- 👤 John A Price
- 👤 Mary J Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:33
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |