US2897138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacting solids and gases
Assignee: Houdry Process Corp
•
Filing: 1951-03-31
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Granted: 1959-07-28
•
Expires: 1971-03-31
Abstract
No abstract record available.
Inventors
- 👤 David B Ardern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:58
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
5. IN A PROCESS WHEREIN GAS FLOW UPWARDLY THROUGH A COMPACT BED OF GRANULAR CONTACT MATERIAL CONTAINED WITHIN A CONFINED CONTACT ZONE, THE STEPS WHICH COMPRISE; WITHDRAWING A PLURALITY OF CONFINED COMPACT MOVING STREAMS OF SOILDS FROM SAID BED AT LOCATIONS UNIFORMLY DISTRIBUTED ACROSS THE LOWER REGION OF SAID BED A SUBSTANTIAL DISTANCE ABOVE THE LOWER END OF SAID CONTACT ZONE, THEREBY SEPARATING SAID COMPACT BED INTO A UNIFORMLY GRAVITATING UPPER PORTION AND A STATIC LOWER LAYER, PASSING SAID CONFINED STREAMS OF SOLIDS DOWNWARDLY THROUGH A SOLIDS-FREE PLENUM DIRECTLY BENEATH SAID CONTACT ZONE AND THEREAFTER MERGING THE SAME INTO A SINGLE COMPACT MOVING STREAM, INTRODUCING SAID GAS INTO SAID PLENUM, PASSING SAID GAS UPWARDLY AS A PLURALITY OF CONFINED STREAMS FROM SAID PLENUM INTO THE BOTTOM REGIONS OF SAID STATIC LAYER TO ENGAGE SAID SOLIDS AT LOCATIONS UNIFORMLY DISTRIBUTED ACROSS THE BOTTOM CROSS-
Claim 2
Dependent Claim
143 words
5. IN A PROCESS WHEREIN GAS FLOW UPWARDLY THROUGH A COMPACT BED OF GRANULAR CONTACT MATERIAL CONTAINED WITHIN A CONFINED CONTACT ZONE, THE STEPS WHICH COMPRISE; WITHDRAWING A PLURALITY OF CONFINED COMPACT MOVING STREAMS OF SOILDS FROM SAID BED AT LOCATIONS UNIFORMLY DISTRIBUTED ACROSS THE LOWER REGION OF SAID BED A SUBSTANTIAL DISTANCE ABOVE THE LOWER END OF SAID CONTACT ZONE, THEREBY SEPARATING SAID COMPACT BED INTO A UNIFORMLY GRAVITATING UPPER PORTION AND A STATIC LOWER LAYER, PASSING SAID CONFINED STREAMS OF SOLIDS DOWNWARDLY THROUGH A SOLIDS-FREE PLENUM DIRECTLY BENEATH SAID CONTACT ZONE AND THEREAFTER MERGING THE SAME INTO A SINGLE COMPACT MOVING STREAM, INTRODUCING SAID GAS INTO SAID PLENUM, PASSING SAID GAS UPWARDLY AS A PLURALITY OF CONFINED STREAMS FROM SAID PLENUM INTO THE BOTTOM REGIONS OF SAID STATIC LAYER TO ENGAGE SAID SOLIDS AT LOCATIONS UNIFORMLY DISTRIBUTED ACROSS THE BOTTOM CROSS-
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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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |