US3715335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester backbone quaternary ammonium polyelectrolytes
Assignee: Chevron USA Inc
•
Filing: 1971-03-04
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Granted: 1973-02-06
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Expires: 1991-03-04
Abstract
Abstract CATIONIC POLYELECTROLYTES HAVING A LINEAR POLYESTER BACKBONE WITH ATTACHED SIDE CHAINS CONTAINING QUATERNARY AMMONIUM EPOXIDE GROUPS AND OPTIONAL HYDROXYL OR PRIMARY AMINE GROUPS.
Inventors
- 👤 R Bacskai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/918
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |