Patent US2235121A successfully refreshed from Google Patents.
Patent US2526486A successfully refreshed from Google Patents.
US2526486A
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Handling pulverulent catalyst in hydrocarbon conversion and catalyst regeneration operations
Assignee: Standard Oil Development Co
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Filing: 1941-07-12
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Granted: 1950-10-17
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Expires: 1961-07-12
Abstract
No abstract record available.
Inventors
- 👤 Robert W Krebs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:50
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
PROCESS OF MAINTAINING A FLUIDIZED MASS OF FINELY DIVIDED SOLIDS SERVING AS A SOURCE OF SUPPLY FOR A CHEMICAL REACTION, COMPRISING CONTINUOUSLY INTRODUCING INTO THE MASS A STREAM OF FLUIDIZING GAS, SUPPLYING SAID MASS WITH SAID SOLIDS AS SEPARATE STREAMS IN VARYING DEGREES OF SUBDIVISION INCLUDING PARTICLES OF EXTREME FINENESS, AND MIXING A PORTION ONLY OF THE PARTICLES OF SAID SOLIDS LARGER THAN SAID PARTICLES OF EXTREME FINENESS WITH SAID PARTICLES OF EXTREME FINENESS, PRIOR TO THEIR DISCHARGE TO SAID CHEMICAL REACTION, WHEREBY THE FLOW CHARACTERISTICS OF SAID PARTAICLES OF EXTREME FINENESS ARE IMPROVED AND THE MAINTENANCE OF THE MASS IN FLUIDIZED CONDITION IS FACILITATED.
Claim 2
Dependent Claim
105 words
PROCESS OF MAINTAINING A FLUIDIZED MASS OF FINELY DIVIDED SOLIDS SERVING AS A SOURCE OF SUPPLY FOR A CHEMICAL REACTION, COMPRISING CONTINUOUSLY INTRODUCING INTO THE MASS A STREAM OF FLUIDIZING GAS, SUPPLYING SAID MASS WITH SAID SOLIDS AS SEPARATE STREAMS IN VARYING DEGREES OF SUBDIVISION INCLUDING PARTICLES OF EXTREME FINENESS, AND MIXING A PORTION ONLY OF THE PARTICLES OF SAID SOLIDS LARGER THAN SAID PARTICLES OF EXTREME FINENESS WITH SAID PARTICLES OF EXTREME FINENESS, PRIOR TO THEIR DISCHARGE TO SAID CHEMICAL REACTION, WHEREBY THE FLOW CHARACTERISTICS OF SAID PARTAICLES OF EXTREME FINENESS ARE IMPROVED AND THE MAINTENANCE OF THE MASS IN FLUIDIZED CONDITION IS FACILITATED.
References Cited (Backward Citations)
US1298409A
Cited
US1508331A
Cited
US1553539A
Cited
US1446778A
Cited
US1970405A
Cited
US1997125A
Cited
US2037090A
Cited
US2231424A
Cited
US2322019A
Cited
US2302328A
Cited
US2325516A
Cited
US2326705A
Cited
US2273075A
Cited
US2302209A
Cited
US2337684A
Cited
US2347682A
Cited
US2373008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |