Patent US2481278A successfully refreshed from Google Patents.
US2481278A
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Polyoxyalkylene compounds
Assignee: Shell Development Co
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Filing: 1946-08-31
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Granted: 1949-09-06
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Expires: 1966-08-31
Abstract
No abstract record available.
Inventors
- 👤 Ballard Seaver Ames
- 👤 Morris Rupert Clarke
- 👤 John L Van Winkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
C; C10; C10M; C10M3/00; C08; C08G; C08G65/00; C08G65/34; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/109; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/20; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2219/00; C10M2219/04; C10M2219/042; C10M2221/00; C10M2221/02; C10M2221/04; C10M2221/043; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2225/00; C10M2225/02; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2258892A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |