US2875137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids feeding process and apparatus
Assignee: Union Oil Company of California
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Filing: 1955-10-24
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Granted: 1959-02-24
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Expires: 1975-10-24
Abstract
No abstract record available.
Inventors
- 👤 William C Lieffers
- 👤 Robert L Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:42
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A PROCESS WHEREIN SOLIDS ARE MOVED UPWARDLY AND SUCCESSIVELY THROUGH A DISENGAGING ZONE AND A CONTACTING ZOPNE COUNTERCURRENT TO A DESCENDING TREATING FLUID WHICH EDUCTS FROM SAID SOLIDS IN SAID CONTACTING ZONE A PRODUCT WHICH CONDENSE AND SEPARATES IN SAID DISENGAGING ZONE AS A LIQUID WHICH IS WITHDRAWN THEREFROM AS A PROCESS PRODUCT, THE SAID MOVEMENT OF SAID SOLIDS BEING EFFECTED BY MEANS OF A SOLIDS FEEDER PISTON WHICH IS CAUSED TO RECIPROCATE WITHIN A VERTICAL SOLIDS FEEDER CYLINDER, THE IMPROVEMENT WHICH CONSISTS IN SEPARATING A PORTION OF SAID PROCESS LIQUID, TREATING SAID PORTION TO ADAPT IT TO USE AS A HYDRAULIC FLUID, INTRODUCING SAID TREATED LIQUID INTO SAID CYLINDER NELOW SAID PISTON UNDER SUFFICIENT LIQUID SURE TO FORCE SAID PISTON AND SAID SOLIDS UPWARDLY, AND ALLOWING A PORTION OF SAID TREATED LIQUID TO PASS UPWARDLY THROUGH THE SPACE BETWEEN SAID PISTON AND SAID CYLINDER TO LUBRICATE SAID PISTON AND TO PURGE SOLIDS FINES FROM SAID SPACE.
Claim 2
Dependent Claim
158 words
IN A PROCESS WHEREIN SOLIDS ARE MOVED UPWARDLY AND SUCCESSIVELY THROUGH A DISENGAGING ZONE AND A CONTACTING ZOPNE COUNTERCURRENT TO A DESCENDING TREATING FLUID WHICH EDUCTS FROM SAID SOLIDS IN SAID CONTACTING ZONE A PRODUCT WHICH CONDENSE AND SEPARATES IN SAID DISENGAGING ZONE AS A LIQUID WHICH IS WITHDRAWN THEREFROM AS A PROCESS PRODUCT, THE SAID MOVEMENT OF SAID SOLIDS BEING EFFECTED BY MEANS OF A SOLIDS FEEDER PISTON WHICH IS CAUSED TO RECIPROCATE WITHIN A VERTICAL SOLIDS FEEDER CYLINDER, THE IMPROVEMENT WHICH CONSISTS IN SEPARATING A PORTION OF SAID PROCESS LIQUID, TREATING SAID PORTION TO ADAPT IT TO USE AS A HYDRAULIC FLUID, INTRODUCING SAID TREATED LIQUID INTO SAID CYLINDER NELOW SAID PISTON UNDER SUFFICIENT LIQUID SURE TO FORCE SAID PISTON AND SAID SOLIDS UPWARDLY, AND ALLOWING A PORTION OF SAID TREATED LIQUID TO PASS UPWARDLY THROUGH THE SPACE BETWEEN SAID PISTON AND SAID CYLINDER TO LUBRICATE SAID PISTON AND TO PURGE SOLIDS FINES FROM SAID SPACE.
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |