US3533973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester polycondensation in the presence of a catalytic amount of a trivalent aluminum salt
Assignee: FMC Corp
•
Filing: 1968-11-04
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Granted: 1970-10-13
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Expires: 1988-11-04
Abstract
No abstract record available.
Inventors
- 👤 Mary J Stewart
- 👤 John A Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2345700A
Cited
US2850483A
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US3220982A
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US3386960A
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US3420801A
Cited
US3377319A
Cited
US3425994A
Cited
US3438944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |