US3543485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal particle separator
Assignee: Universal Oil Products Co
•
Filing: 1968-09-23
•
Granted: 1970-12-01
•
Expires: 1988-09-23
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Hardison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
B; B04; B04C; B04C3/00; B04C2003/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US6187A
Cited
US1038707A
Cited
US1372714A
Cited
US2201301A
Cited
FR1033954A
Cited
GB821574A
Cited
GB901290A
Cited
US3216182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |