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Patent US2889269A successfully refreshed from Google Patents.
US2889269A
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Removal of adhered catalyst from inert shot in a fluidized solids catalytic process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-12-30
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Granted: 1959-06-02
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Nicholson Edward Wheelo Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:22
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1863; B01J8/24; B01J8/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A METHOD OF CARRYING OUT FLUID CATALYTIC PROCESSES IN WHICH INERT HEAT TRANSFER SOLIDS OR SHOT PARTICLES ARE CIRCULATED IN A REACTOR-REGENERATOR SYSTEM WITH THE CATALYST, THEIMPROVEMENT WHICH COMPRISES PREVENTING THE BUILD UP OF A COATING OF FINE CATALYST PARTICLES UPON THE SHOT PARTICLES BY WITHDRAWING SHOT FROM THE CIRCULATING ERATION WHICH REMOVES ADHERING CATALYST FINES AND RETURNING THE CLEANED SHOT TO THE CIRCULATING SYSTEM.
Claim 2
Dependent Claim
66 words
IN A METHOD OF CARRYING OUT FLUID CATALYTIC PROCESSES IN WHICH INERT HEAT TRANSFER SOLIDS OR SHOT PARTICLES ARE CIRCULATED IN A REACTOR-REGENERATOR SYSTEM WITH THE CATALYST, THEIMPROVEMENT WHICH COMPRISES PREVENTING THE BUILD UP OF A COATING OF FINE CATALYST PARTICLES UPON THE SHOT PARTICLES BY WITHDRAWING SHOT FROM THE CIRCULATING ERATION WHICH REMOVES ADHERING CATALYST FINES AND RETURNING THE CLEANED SHOT TO THE CIRCULATING SYSTEM.
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |