US2980592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retorting process and apparatus
Assignee: Union Oil Company of California
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Filing: 1958-06-19
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Granted: 1961-04-18
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Expires: 1978-06-19
Abstract
No abstract record available.
Inventors
- 👤 Roland F Deering
- 👤 Roland O Dhondt
- 👤 James R Hunt
- 👤 Arnold E Kelley
- 👤 Charles J Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:51
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; C10J; C10J3/00; C10J3/02; C10J3/20; C10J3/22; C10J3/24; C10J3/26; C10J3/30; C10J3/32; C10J3/72; C10J3/723; C10J3/74; C10J3/76; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A METHOD FOR CONTINUOUSLY PROCESSING SOLIDS, WHEREIN SAID SOLIDS ARE PASSED UPWARDLY THROUGH A SOLIDS BED CONTAINING A PROCESSING ZONE TO WHICH HEAT IS SUPPLIED BY DIRECT CONTACT WITH A DOWNWARDLY FLOWING STREAM OF COMBUSTION GAS FROM A COMBUSTION ZONE MAINTAINED AT A HIGHER ZONE WITHIN SAID BED OF SOLIDS, THE IMPROVED METHOD OF MAXIMIZING VESSEL CAPACITY AND MINIMIZING THERMAL STRESS OF SAID VESSEL WALLS, WHICH COMPRISES PERMITTING SAID BED OF SOLIDS TO RISE ABOVE THE UPPER EDGE OF THE VESSEL, SUPPLYING COMBUSTION SUPPORTING FLUID DOWNWARDLY THROUGH THE UPPER SURFACE OF SAID RISING MASS, AND CONTINUOUSLY SCRAPING THE UPPER SURFACE OF SAID RISING MASS TO SHAPE SAID MASS INTO A FORM WHICH WILL PERMIT THE DOWNWARDLY INTRODUCED COMBUSTION SUPPORTING FLUID TO BE UNIFORMLY DISTRIBUTED OVER THE CROSS SECTIONAL AREA OF SAID BED OF SOLIDS AND MAINTAINING A SUBSTANTIAL PORTION OF SAID COMBUSTION ZONE ABOVE SAID UPPER VESSEL EDGE AND WITHIN SAID RISING MASS OF SOLIDS.
Claim 2
Dependent Claim
156 words
IN A METHOD FOR CONTINUOUSLY PROCESSING SOLIDS, WHEREIN SAID SOLIDS ARE PASSED UPWARDLY THROUGH A SOLIDS BED CONTAINING A PROCESSING ZONE TO WHICH HEAT IS SUPPLIED BY DIRECT CONTACT WITH A DOWNWARDLY FLOWING STREAM OF COMBUSTION GAS FROM A COMBUSTION ZONE MAINTAINED AT A HIGHER ZONE WITHIN SAID BED OF SOLIDS, THE IMPROVED METHOD OF MAXIMIZING VESSEL CAPACITY AND MINIMIZING THERMAL STRESS OF SAID VESSEL WALLS, WHICH COMPRISES PERMITTING SAID BED OF SOLIDS TO RISE ABOVE THE UPPER EDGE OF THE VESSEL, SUPPLYING COMBUSTION SUPPORTING FLUID DOWNWARDLY THROUGH THE UPPER SURFACE OF SAID RISING MASS, AND CONTINUOUSLY SCRAPING THE UPPER SURFACE OF SAID RISING MASS TO SHAPE SAID MASS INTO A FORM WHICH WILL PERMIT THE DOWNWARDLY INTRODUCED COMBUSTION SUPPORTING FLUID TO BE UNIFORMLY DISTRIBUTED OVER THE CROSS SECTIONAL AREA OF SAID BED OF SOLIDS AND MAINTAINING A SUBSTANTIAL PORTION OF SAID COMBUSTION ZONE ABOVE SAID UPPER VESSEL EDGE AND WITHIN SAID RISING MASS OF SOLIDS.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |