US3391223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesterification reaction products of a polyhydric alcohol and a 3, 4-dicarboxy-1, , 3, 4-tetrahydro-1-naphthalenesuccinic dianhydride
Assignee: Wyeth Holdings LLC
•
Filing: 1967-01-03
•
Granted: 1968-07-02
•
Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Leone Roland Ralph Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:43
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/137; C08G63/52; C08G63/54; C08G63/553
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |