Patent US3236029A successfully refreshed from Google Patents.
US3236029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1962-10-15
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Granted: 1966-02-22
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Ronald L Afdahl
- 👤 Charles G Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:23
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS COMPRISING THE STEPS OF: (1) CONTACTING NATURAL GAS WITH LEAN ABSORPTION OIL AND ABSORBING CONDENSIBLE HYDROCARBONS INCLUDING PROPANE AND HEAVIER HYDROCARBONS AND UNAVOIDABLY ABSORBING METHANE AND ETHANE; (2) HEATING THE RESULTING RICH OIL AND PASSING SAME INTO AN UPRIGHT STRIPPING ZONE LEADING DIRECTLY INTO AND STRIPPING PRINCIPALLY ETHANE AND METHANE VAPORS ALONG WITH HEAVIER HYDROCARBONS ABSORBED IN STEP (1) AND PASSING THE STRIPPED VAPORS DIRECTLY INTO SAID ABSORPTION ZONE; (3) HEATING THE LOWER SECTION OF THE STRIPPING ZONE OF STEP (2) AND FURTHER STRIPPING SAID OIL OF ETHANE AND HEAVIER HYDROCARBONS AND CAUSING STRIPPED HYDROCARBON VAPORS TO ASCEND DIRECTLY INTO THE BOTTOM OF ABSORPTION ZONE OF STEP (2); (4) PASSING LEAN OIL DOWNWARDLY THRU THE ABSORPTION
Claim 2
Dependent Claim
118 words
A PROCESS COMPRISING THE STEPS OF: (1) CONTACTING NATURAL GAS WITH LEAN ABSORPTION OIL AND ABSORBING CONDENSIBLE HYDROCARBONS INCLUDING PROPANE AND HEAVIER HYDROCARBONS AND UNAVOIDABLY ABSORBING METHANE AND ETHANE; (2) HEATING THE RESULTING RICH OIL AND PASSING SAME INTO AN UPRIGHT STRIPPING ZONE LEADING DIRECTLY INTO AND STRIPPING PRINCIPALLY ETHANE AND METHANE VAPORS ALONG WITH HEAVIER HYDROCARBONS ABSORBED IN STEP (1) AND PASSING THE STRIPPED VAPORS DIRECTLY INTO SAID ABSORPTION ZONE; (3) HEATING THE LOWER SECTION OF THE STRIPPING ZONE OF STEP (2) AND FURTHER STRIPPING SAID OIL OF ETHANE AND HEAVIER HYDROCARBONS AND CAUSING STRIPPED HYDROCARBON VAPORS TO ASCEND DIRECTLY INTO THE BOTTOM OF ABSORPTION ZONE OF STEP (2); (4) PASSING LEAN OIL DOWNWARDLY THRU THE ABSORPTION
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |