US2451668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for reconditioning contaminated oil
Assignee: BUCKEYE LAB CORP
•
Filing: 1943-03-17
•
Granted: 1948-10-19
•
Expires: 1963-03-17
Abstract
No abstract record available.
Inventors
- 👤 Charles J Egger
- 👤 Robert H Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:40
CPC Classifications
C; C10; C10G; C10G31/00; C10M; C10M175/00; Y; Y10; Y10S; Y10S159/00; Y10S159/01
Claims Analysis
Total Claims: 0
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US2344984A
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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) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |