Patent US3220165A successfully refreshed from Google Patents.
US3220165A
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Method for removing entrained solids from a gaseous stream
Assignee: Alcan Research and Development Ltd
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Filing: 1961-12-27
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Granted: 1965-11-30
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Henry J Howie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:44
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/30; B01D46/32; B01J; B01J8/00; B01J8/005; B01D2273/00; B01D2273/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF FILTERING ENTRAINED MATERIALS FROM A GASEOUS STREAM WHICH COMPRISES FLOWING SAID GASEOUS STREAM THROUGH A FILTERING ZONE, CONTACTING THE GASEOUS STREAM WITH A DOWNWARDLY MOVING, PERMEABLE MASS OF SOLID PARTICLES OF INERT MATERIAL SO AS TO FILTER THE ENTRAINED MATERIALS FROM THE GASEOUS STREAM, MECHANICALLY AGITATING THE MASS OF PARTICLES IN THE PORTION OF THE FILTERING ZONE WHEREIN OCCURS INITIAL CONTACT OF THE GASEOUS STREAM WITH THE PARTICLES OF INERT MATERIAL SO AS TO PRESENT FRESHLY EXPOSED SURFACES OF THE PARTICLES FOR SAID INITIAL CONTACT WITHDRAWING THE THUS CONTACTED GASEOUS STREAM, SUBSTANTIALLY
Claim 2
Independent Claim
95 words
A METHOD OF FILTERING ENTRAINED MATERIALS FROM A GASEOUS STREAM WHICH COMPRISES FLOWING SAID GASEOUS STREAM THROUGH A FILTERING ZONE, CONTACTING THE GASEOUS STREAM WITH A DOWNWARDLY MOVING, PERMEABLE MASS OF SOLID PARTICLES OF INERT MATERIAL SO AS TO FILTER THE ENTRAINED MATERIALS FROM THE GASEOUS STREAM, MECHANICALLY AGITATING THE MASS OF PARTICLES IN THE PORTION OF THE FILTERING ZONE WHEREIN OCCURS INITIAL CONTACT OF THE GASEOUS STREAM WITH THE PARTICLES OF INERT MATERIAL SO AS TO PRESENT FRESHLY EXPOSED SURFACES OF THE PARTICLES FOR SAID INITIAL CONTACT WITHDRAWING THE THUS CONTACTED GASEOUS STREAM, SUBSTANTIALLY
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |