Patent US3576781A successfully refreshed from Google Patents.
US3576781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing fusible polyhydroxy-polyether resins
Assignee: Hi Tek Polymers Inc
•
Filing: 1970-02-02
•
Granted: 1971-04-27
•
Expires: 1990-02-02
Abstract
Abstract A PROCESS FOR PREPARING POLYHYDROXY-POLYETHER RESINS, USEFUL AS FILM FORMING AND COATING COMPOSITIONS, BY REACTING A POLYEPOXIDE COMPOUND WITH APOLYHYDRIC ALCOHOL IN A KETONE SOLVENT USING A LEWIS-ACID CATALYST.
Inventors
- 👤 Darrell D Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4895; C08G59/00; C08G59/18; C08G59/40; C08G59/62
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |