US2487577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption process
Assignee: Phillips Petroleum Co
•
Filing: 1945-11-19
•
Granted: 1949-11-08
•
Expires: 1965-11-19
Abstract
No abstract record available.
Inventors
- 👤 Clyde P Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:29
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1412; B01D53/1456; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/526; C; C07; C07C; C07C7/00; C07C7/11; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1834016A
Cited
US2002357A
Cited
US2177068A
Cited
US2242323A
Cited
US2368595A
Cited
US2355147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |