US3673157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc and manganese gentisate as polyester catalysts and molecular weight enhancer
Assignee: FMC Corp
•
Filing: 1970-07-31
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Granted: 1972-06-27
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Expires: 1990-07-31
Abstract
Abstract Zinc and manganese gentisate and fiber and film-forming polyester resins comprising the condensation polymerization product of (a) a saturated diester, (b) a saturated diol, and (c) a catalytic amount of zinc or manganese gentisate.
Inventors
- 👤 John A Price
- 👤 Mary J Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:52
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3057826A
Cited
US3227680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |