US2425085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil purifying substances and method x
Assignee: —
•
Filing: —
•
Granted: 1947-08-05
•
Expires: 1964-08-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/08; C10M135/10; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/10; C10M2207/16; C10M2207/24; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2010/00; C10N2010/02; C10N2010/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1633941A
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US1747987A
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US2303546A
Cited
US2321884A
Cited
US2262926A
Cited
US2343435A
Cited
US2343436A
Cited
US2300555A
Cited
US2363504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-04 | 1951-02-03 | 1951-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-04 | 1955-02-03 | 1955-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-04 | 1959-02-03 | 1959-08-05 | $7700.00 | Window Closed / Lapsed |