US3228528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic filtering apparatus
Assignee: Commercial Filters Corp
•
Filing: 1962-08-03
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Granted: 1966-01-11
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Expires: 1982-08-03
Abstract
No abstract record available.
Inventors
- 👤 John R Mummert
- 👤 Earl E Trammel
- 👤 John D Shinn
- 👤 Orien K Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D21/00; B01D21/0006; B01D21/0012; B01D21/02; B01D21/04; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D29/668; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446; Y; Y10; Y10S; Y10S8/00; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
FILTERING APPARATUS COMPRISING A TANK, MEANS MOUNTING A PLURALITY OF TUBULAR FILTERS DISPOSED IN CONCENTRIC ANNULZR ROWS IN SAID TANK WITH EACH FILTER OF EACH ROW OUT OF RADIAL ALIGNMENT WITH THE FILTERS OF THE OTHER ROWS, MEANS FORMING A CLOSED CHAMBER OVER SAID FILTERS, MEANS CONNECTED TO SAID CLOSED CHAMBER FOR DRAWING FLUID FROM SAID TANK THROUGH SAID FILTERS, AND BACKWASHING MEANS COMPRISING A HOLLOW ROTOR MOUNTED FOR ROTATION OVER THE ENDS OF SAID FILTERS, MEANS TO SUPPLY BACKWASH FLUID UNDER PRESSURE TO SAID ROTOR HAVING APERTURES IN RADIAL ALIGNMENT AND SPACED APART SO AS TO REGISTER WITH SAID CONCENTRIC FILTER ROWS FOR CYCLICALLY FEEDING FLUID TO ONLY A LIMITED NUMBER OF SAID FILTERS AT ONE TIME AS THE ROTOR SWEEPS OVER SAID FILTER ENDS, SAID ROTOR HAVING MEANS TO ISOLATE SAID FILTERS FROM SAID CLOSED CHAMBER DURING BACKWASH.
Claim 2
Dependent Claim
140 words
FILTERING APPARATUS COMPRISING A TANK, MEANS MOUNTING A PLURALITY OF TUBULAR FILTERS DISPOSED IN CONCENTRIC ANNULZR ROWS IN SAID TANK WITH EACH FILTER OF EACH ROW OUT OF RADIAL ALIGNMENT WITH THE FILTERS OF THE OTHER ROWS, MEANS FORMING A CLOSED CHAMBER OVER SAID FILTERS, MEANS CONNECTED TO SAID CLOSED CHAMBER FOR DRAWING FLUID FROM SAID TANK THROUGH SAID FILTERS, AND BACKWASHING MEANS COMPRISING A HOLLOW ROTOR MOUNTED FOR ROTATION OVER THE ENDS OF SAID FILTERS, MEANS TO SUPPLY BACKWASH FLUID UNDER PRESSURE TO SAID ROTOR HAVING APERTURES IN RADIAL ALIGNMENT AND SPACED APART SO AS TO REGISTER WITH SAID CONCENTRIC FILTER ROWS FOR CYCLICALLY FEEDING FLUID TO ONLY A LIMITED NUMBER OF SAID FILTERS AT ONE TIME AS THE ROTOR SWEEPS OVER SAID FILTER ENDS, SAID ROTOR HAVING MEANS TO ISOLATE SAID FILTERS FROM SAID CLOSED CHAMBER DURING BACKWASH.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |