US2805773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous rotary filtration
Assignee: Standard Oil Co
•
Filing: 1954-12-14
•
Granted: 1957-09-10
•
Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert W Mecklin
- 👤 Jr Wallace E Voreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:27
CPC Classifications
B; B01; B01D; B01D37/00; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/46; B01D33/466; B01D33/80; B01D33/804; B01D33/807; B01D37/02; B01D37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2270938A
Cited
US2308716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |