Patent US3393243A successfully refreshed from Google Patents.
US3393243A
Expired / Lapsed
US
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Process of preparing polyoxypropylene polyether polyols
Assignee: Texaco Inc
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Filing: 1964-09-24
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Granted: 1968-07-16
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Expires: 1984-09-24
Abstract
No abstract record available.
Inventors
- 👤 Cuscurida Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:32
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2648; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4866
Claims Analysis
Total Claims: 0
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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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |