US2737261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple stage separator
Assignee: Farr Co
•
Filing: 1952-09-15
•
Granted: 1956-03-06
•
Expires: 1972-09-15
Abstract
No abstract record available.
Inventors
- 👤 Sydney F Duncan
- 👤 Allen W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:13
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE49115C
Cited
US83506A
Cited
US220118A
Cited
US393614A
Cited
US1376691A
Cited
US1947797A
Cited
US2048956A
Cited
US768627A
Cited
US1426177A
Cited
US1751915A
Cited
US1841691A
Cited
US2400719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |