US2728641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-responsive decanting control
Assignee: Standard Oil Co
•
Filing: 1952-04-30
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Granted: 1955-12-27
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Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Thorp
- 👤 Lawrence W Harms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:06
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/187; B; B01; B01J; B01J8/00; B01J8/18; B01J8/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
IN A SYSTEM FOR DECANTING OIL FROM A SOLID CATALYSTOIL SLURRY WHEREIN THE OIL SLURRY IS SUBJECTED TO SETTLING AND SEPARATED STREAMS OF CATALYST-FREE OIL AND A CONCENTRATED CATALYST SLURRY IS RECOVERED, THE IMPROVEMENT WHICH COMPRISES MEANS FOR PUMPING THE CONCENTRATED SLURRY FROM A SETTLING CHAMBER AT A RATE ADAPTED TO WITHDRAW A MINIMUM PROPORTION OF OIL WITH SOLID CATALYST, AND TEMPERATURE-RESPONSIVE MEANS FOR CONTROLLING THE PUMPING RATE IN RESPONSE TO THE TEMPERATURE OF THE CONCENTRATED OIL-CATALYST SLURRY FROM THE SETTLING CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |