US2839196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil reclaimer
Assignee: Individual
•
Filing: 1955-08-09
•
Granted: 1958-06-17
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 William C Schwalger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D35/185; F; F01; F01M; F01M1/00; F01M1/10; F01M5/00; F01M5/001; F16; F16N; F16N39/00; F16N39/005; F01M13/00; F01M13/04; F01M2013/0438
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB469087A
Cited
US2289553A
Cited
US2346042A
Cited
US2377988A
Cited
US2428939A
Cited
US2635759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |