US3220165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing entrained solids from a gaseous stream
Assignee: Alcan Research and Development Ltd
•
Filing: 1961-12-27
•
Granted: 1965-11-30
•
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 11:16
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
References Cited (Backward Citations)
DE658876C
Cited
US620925A
Cited
US1464113A
Cited
DE635082C
Cited
US2400645A
Cited
US2580635A
Cited
US2685388A
Cited
GB685495A
Cited
US2728995A
Cited
US2701623A
Cited
US2849293A
Cited
US2911730A
Cited
US2781255A
Cited
US2900256A
Cited
US2897918A
Cited
GB879216A
Cited
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 |