Patent US2832725A successfully refreshed from Google Patents.
US2832725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid shale retorting with intermediate oil recovery
Assignee: California Research LLC
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Filing: 1955-03-30
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Granted: 1958-04-29
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:23
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A PROCESS FOR REMOVING HYDROCARBONS FROM OILBEARING MINERAL SOLIDS COMPRISING PASSING SAAID SOLIDS IN PARTICULATE FORM DOWNWARDLY THROUGH A SOLIDS PREHEATING ZONE, A RETORTING ZONE, AND A GAS PREHEAATING ZONE IN COUNTERCURRENT CONTACT IN EACH OF SAID ZONE WITH RISING RECYCLED GASEOUS RETORTING PRODUCTS, WITHDRAWING FROM SAID RETORING ZONE A SUBSTANTIAL PORTION OF THE OIL VAPORS PRODUCED THEREIN, SEPERATING THE NORMALLY LIQUID XOMPOMENTS FROM SAID VAPORS, PASSING AT LEAST SOME OF THE REMAINING GASEOUS COMPONENTS OF SAID VAPORS INTO SAID SOLIDS PREHEATING ZONE TO HEAT THE SOLIDS THEREIN AND THEREBY TO COOL SAID GASEOUS COMPONENTS, RECECLING GASES SO COLLED FROM SAID SOLIDS PREHEATING ZONE TO SAID GAS PREHEATING ZONE FOR PREHEATING IN THE PRESENCE OF THE HOT
Claim 2
Dependent Claim
118 words
IN A PROCESS FOR REMOVING HYDROCARBONS FROM OILBEARING MINERAL SOLIDS COMPRISING PASSING SAAID SOLIDS IN PARTICULATE FORM DOWNWARDLY THROUGH A SOLIDS PREHEATING ZONE, A RETORTING ZONE, AND A GAS PREHEAATING ZONE IN COUNTERCURRENT CONTACT IN EACH OF SAID ZONE WITH RISING RECYCLED GASEOUS RETORTING PRODUCTS, WITHDRAWING FROM SAID RETORING ZONE A SUBSTANTIAL PORTION OF THE OIL VAPORS PRODUCED THEREIN, SEPERATING THE NORMALLY LIQUID XOMPOMENTS FROM SAID VAPORS, PASSING AT LEAST SOME OF THE REMAINING GASEOUS COMPONENTS OF SAID VAPORS INTO SAID SOLIDS PREHEATING ZONE TO HEAT THE SOLIDS THEREIN AND THEREBY TO COOL SAID GASEOUS COMPONENTS, RECECLING GASES SO COLLED FROM SAID SOLIDS PREHEATING ZONE TO SAID GAS PREHEATING ZONE FOR PREHEATING IN THE PRESENCE OF THE HOT
References Cited (Backward Citations)
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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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |