US2618644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bleaching oil with adsorbent
Assignee: Girdler Corp
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Filing: 1948-11-04
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Granted: 1952-11-18
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Expires: 1968-11-04
Abstract
No abstract record available.
Inventors
- 👤 Alton E Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A MULTI-STAGE OIL BLEACHING TREATMENT COMPRISING AS ONE TREATMENT STAGE PASSING OIL AT A BLEACHING TEMPERATURE THROUGH A MASSED BODY OF PARTIALLY SPENT ADSORBENT TO PARTIALLY BLEACH THE OIL; AS A SUBSEQUENT TREATMENT STAGE SUBJECTING SAID PARTIALLY BLEACHED OIL AT A BLEACHING TEMPERATURE TO THE BLEACHING ACTION OF ADSORBENT DISPERSED IN THE OIL, THEREBY PARTIALLY EXPENDING SAID DISPERSED ADSORBENT:SEPARATING SAID PARTIALLY SPENT ADSORBENT FROM THE OIL TREATED IN SAID SUBSEQUENT TREATMENT STAGE; AND PASSING ADDITIONAL OIL THROUGH A MASSED BODY OF SAID SEPARATED PARTIALLY SPENT ADSORBENT ACCORDING TO THE FIRST RECITED TREATMENT STAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |