US3539508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating oil and the like from a liquid
Assignee: Standard Oil Co
•
Filing: 1968-11-29
•
Granted: 1970-11-10
•
Expires: 1988-11-29
Abstract
No abstract record available.
Inventors
- 👤 William L Bulkley
- 👤 Herman E Ries Jr
- 👤 Robert G Will
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; E02B15/103; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/0208; B01D17/0214; C; C10; C10G; C10G33/00; C10G33/06; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1860819A
Cited
US2866827A
Cited
US2860973A
Cited
US3334042A
Cited
US3358838A
Cited
US3426902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |