Patent US2641574A successfully refreshed from Google Patents.
US2641574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for decolorizing oil
Assignee: Standard Oil Co
•
Filing: 1949-07-21
•
Granted: 1953-06-09
•
Expires: 1969-07-21
Abstract
No abstract record available.
Inventors
- 👤 Arthurs Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:44
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/06; C10G25/09; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
THE PROCESS OF DE-COLORIZING FLUID OILS COMPRISING FEEDING A PULVERULENT CONTACT AGENT FROM THE BOTTOM OF A SUPPLY SOURCE TO THE BOTTOM OF A CONSTANT HEAD ZONE THROUGH A CONDUIT BY INTRODUCING A GAS UNDER PRESSURE INTO THE CONDUIT AND MAINTAINING A FLUIDIZED AGITATED MASS OF AGENT IN THE CONSTANT HEAD ZONE, PASSING THE OVERFLOW OF THE AGENT FROM THE UPPER PART OF THE CONSTANT HEAD ZONE BACK TO THE SOURCE OF SUPPLY, FEEDING THE OIL THROUGH A CONDUIT HAVING AN ENTRAINING ZONE THEREIN, FEEDING THE CONTACT AGENT FROM AN
References Cited (Backward Citations)
US1616547A
Cited
US1930597A
Cited
US1881044A
Cited
US1894323A
Cited
US1894331A
Cited
US2440623A
Cited
US2420761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |