Patent US4459226A successfully refreshed from Google Patents.
Patent US3391196A successfully refreshed from Google Patents.
US3391196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High equivalent weight hydroxy-terminated ethylene oxide-butylene oxide polyether polyols
Assignee: Wyandotte Chemicals Corp
•
Filing: 1965-08-16
•
Granted: 1968-07-02
•
Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Mason H Earing
- 👤 Jr John T Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; C08G18/4833; C08G18/4837; C08G18/4866; C08G65/00; C08G65/02; C08G65/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA525844A
Cited
US2819220A
Cited
US3053903A
Cited
US3159591A
Cited
US3169934A
Cited
US3222306A
Cited
US3255253A
Cited
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 |