Patent US3373141A successfully refreshed from Google Patents.
Patent US2951880A successfully refreshed from Google Patents.
US2951880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent recovery
Assignee: Phillips Petroleum Co
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Filing: 1957-12-23
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Granted: 1960-09-06
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 William J Wride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:13
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07B; C07B61/00; C08F10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE PROCESS FOR RECOVERING A HYDROCARBON MATERIAL FROM AN ADSORBENT, SELECTED FROM THE GROUP CONSISTING OF BAUXITE AND ACTIVATED ALUMINA, CONTAINING SAID HYDROCARBON MATERIAL AND IMPURITIES AND HAVING BECOME SPENT BY TREATMENT OF SUCH HYDROCARBON MATERIAL TO REMOVE SAID IMPURITIES THEREFROM, WHICH PROCESS COMPRISES CONTACTING SAID ADSORBENT WITH HEATED GAS WHEREBY SAID HYDROCARBON MATERIAL AND IMPURITIES ARE STRIPPED FROM THE ADSORBENT, RECOVERING A FRACTION OF ADSORBATE WHICH IS LOW IN IMPURITIES AND CONTACTING SAID FRACTION WITH ADSORBENT WHEREBY IMPURITIES ARE REMOVED FROM SAID HYDROCARBON MATERIAL.
Claim 2
Dependent Claim
85 words
THE PROCESS FOR RECOVERING A HYDROCARBON MATERIAL FROM AN ADSORBENT, SELECTED FROM THE GROUP CONSISTING OF BAUXITE AND ACTIVATED ALUMINA, CONTAINING SAID HYDROCARBON MATERIAL AND IMPURITIES AND HAVING BECOME SPENT BY TREATMENT OF SUCH HYDROCARBON MATERIAL TO REMOVE SAID IMPURITIES THEREFROM, WHICH PROCESS COMPRISES CONTACTING SAID ADSORBENT WITH HEATED GAS WHEREBY SAID HYDROCARBON MATERIAL AND IMPURITIES ARE STRIPPED FROM THE ADSORBENT, RECOVERING A FRACTION OF ADSORBATE WHICH IS LOW IN IMPURITIES AND CONTACTING SAID FRACTION WITH ADSORBENT WHEREBY IMPURITIES ARE REMOVED FROM SAID HYDROCARBON MATERIAL.
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) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |