US2435707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for treating oil
Assignee: Individual
•
Filing: 1941-05-31
•
Granted: 1948-02-10
•
Expires: 1961-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ulric B Bray
- 👤 John K Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:52
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/02; B01D39/04; C; C10; C10M; C10M175/00; C10M175/0016
Claims Analysis
Total Claims: 0
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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) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |