US3304288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc ethylene glycoloxide as a polyester polymerization catalyst
Assignee: Monsanto Co
•
Filing: 1966-07-13
•
Granted: 1967-02-14
•
Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Henry L King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:26
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
IN A PROCESS FOR PRODUCING SYNTHETIC, HIGHLY POLYMERIC POLYESTERS WHEREIN AN AROMATIC DICARBOXYLIC ACID AND A POLYMETHYLENE GLYCOL HAVING THE FORMULA,
Claim 2
Dependent Claim
21 words
IN A PROCESS FOR PRODUCING SYNTHETIC, HIGHLY POLYMERIC POLYESTERS WHEREIN AN AROMATIC DICARBOXYLIC ACID AND A POLYMETHYLENE GLYCOL HAVING THE FORMULA,
References Cited (Backward Citations)
US268136A
Cited
US805534A
Cited
US2921051A
Cited
US2895946A
Cited
US2956984A
Cited
US3110693A
Cited
US3110547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |