Patent US3117079A successfully refreshed from Google Patents.
US3117079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stripping operation
Assignee: Phillips Petroleum Co
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Filing: 1961-01-26
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Granted: 1964-01-07
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Expires: 1981-01-26
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:26
CPC Classifications
C; C10; C10G; C10G5/00; C10G5/04; C10G2300/00; C10G2300/10; C10G2300/1025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
A METHOD FOR THE PURIFICATION OF A STRIPPED ABSORPTION OIL WHICH COMPRISES PASSING SAID ABSORPTION OIL FROM A HEATED STRIPPING ZONE IN WHICH IT HAS BEEN STRIPPED TO A RECLAIMING ZONE; PASSING ANOTHER PORTION OF SAID OIL INTO INDIRECT HEAT EXCHANGE WITH OIL IN SAID RECLAIMING ZONE; PASSING A HYDROCARBON STRIPPING MEDIUM SELECTED FROM THE GROUP CONSISTING OF LIQUEFIED PETROLEUM GAS, PROPANE AND BUTANE, AND MIXTURES OF THESE HYDROCARBONS
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) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |