US3360907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning filters
Assignee: Southwest Research Institute
•
Filing: 1963-10-17
•
Granted: 1968-01-02
•
Expires: 1983-10-17
Abstract
No abstract record available.
Inventors
- 👤 Jr John M Clark
- 👤 Robinson W Brown
- 👤 Ross F Meriwether
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:41
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/42; B01D46/4272; B01D46/52; B01D46/521; B01D46/66; B01D46/70; B01D46/71; B01D2279/00; B01D2279/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN AN APPARATUS HAVING A DRUM TYPE FILTER, AIR SUPPLY MEANS FOR CLEANING THE FILTER BY PERIODICALLY BACK-FLUSHING THE FILTER WITH AIR, AND MEANS FOR MOVING THE FILTER TRANSVERSELY RELATIVE TO THE AIR SUPPLY MEANS, THE IMPROVEMENT IN THE AIR SUPPLY MEANS COMPRISING, AIR VALVE MEANS INCLUDING A HOUSING WITHIN SAID FILTER AND HAVING ONE WALL THERROF ADJACENT THERETO, AN AIR SUPPLY INLET CONNECTED TO THE HOUSING, AN ELONGATE NARROW AIR OUTLET ORIFICE IN SAID ADJACENT HOUSING WALL, SAID OUTLET ORIFICE BEING SMALLER THAN SAID INLET AND SPACED THEREFROM, VALVE MEANS POSITIONED ADJACENT THE OUTLET ORIFICE WITHIN THE HOUSING AND ARRANGED TO BE MOVED BETWEEN OPEN AND CLOSED POSITIONS SO AS TO OPEN AND CLOSE COMMUNICATION BETWEEN
Claim 2
Dependent Claim
117 words
IN AN APPARATUS HAVING A DRUM TYPE FILTER, AIR SUPPLY MEANS FOR CLEANING THE FILTER BY PERIODICALLY BACK-FLUSHING THE FILTER WITH AIR, AND MEANS FOR MOVING THE FILTER TRANSVERSELY RELATIVE TO THE AIR SUPPLY MEANS, THE IMPROVEMENT IN THE AIR SUPPLY MEANS COMPRISING, AIR VALVE MEANS INCLUDING A HOUSING WITHIN SAID FILTER AND HAVING ONE WALL THERROF ADJACENT THERETO, AN AIR SUPPLY INLET CONNECTED TO THE HOUSING, AN ELONGATE NARROW AIR OUTLET ORIFICE IN SAID ADJACENT HOUSING WALL, SAID OUTLET ORIFICE BEING SMALLER THAN SAID INLET AND SPACED THEREFROM, VALVE MEANS POSITIONED ADJACENT THE OUTLET ORIFICE WITHIN THE HOUSING AND ARRANGED TO BE MOVED BETWEEN OPEN AND CLOSED POSITIONS SO AS TO OPEN AND CLOSE COMMUNICATION BETWEEN
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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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |