US2876904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined gravity separator and filter
Assignee: Barnes Drill Co
•
Filing: 1955-02-23
•
Granted: 1959-03-10
•
Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 Leslie L Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:01
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/04; B01D29/00; B01D29/09; B01D29/096; B01D29/60; B01D29/605; B01D29/62; B01D29/64; B01D29/6469; B01D29/6484; B01D29/88; B01D29/90; B01D33/056; B01D33/15; B01D33/35; B01D33/37; B01D33/39; B01D33/44; B01D33/46; B01D33/466; B01D33/48; B01D33/50; B01D33/52; B01D33/56; B01D33/70; B01D33/72; B01D33/80; B01D33/804; B01D33/807; B01D2201/00; B01D2201/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1769655A
Cited
US794631A
Cited
US1826361A
Cited
US2458139A
Cited
US2664203A
Cited
US2650710A
Cited
US2720973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |