Patent US3175690A successfully refreshed from Google Patents.
US3175690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic rotary drum filter unit
Assignee: Komline Sanderson Engineering Corp
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Filing: 1961-07-06
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Granted: 1965-03-30
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Expires: 1981-07-06
Abstract
No abstract record available.
Inventors
- 👤 Aden R Sirles
- 👤 Thomas R Komline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:17
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/067; B01D33/073; B01D33/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A HOLLOW PLASTIC FILTER DRUM OF CYLINDRICAL CONFIGURATION COMPRISING A RIGID SHAFT EXTENDING COAXIALLY THROUGH SAID DRUM, A PAIR OF RELATIVELY SPACED END DISCS OF PLASTIC MATERIAL FIXEDLY SUPPORTED ON SAID SHAFT, A CYLINDRICAL WALL OF SHEET PLASTIC MATERIAL SUPPORTED BETWEEN SAID END DISC COAXIALLY TO THE SAID SHAFT, A FILTRATE VALVE PLATE FIXED AT ONE END OF THE DRUM,SAID DRUM BEING FILLED WITH A RIGID PLASTIC FOAM ADHESIVLELY SECURED TO THE INTERIOR OF THE DRUM AND TO SAID SHAFT AND RIGIDLY INTERCONNECTING THE CYLINDRICAL DRUM WALL AND THE RIGID SHAFT, AND FILTRATE PASSAGES FORMED IN AND EXTENDING THROUGH SAID FOAM FROM SAID CYLINDRICAL WALL TO SAID VALVE PLATE AND OPENING THROUGH BOTH SAID WALL AND SAID VALVE PLATE.
Claim 2
Dependent Claim
119 words
A HOLLOW PLASTIC FILTER DRUM OF CYLINDRICAL CONFIGURATION COMPRISING A RIGID SHAFT EXTENDING COAXIALLY THROUGH SAID DRUM, A PAIR OF RELATIVELY SPACED END DISCS OF PLASTIC MATERIAL FIXEDLY SUPPORTED ON SAID SHAFT, A CYLINDRICAL WALL OF SHEET PLASTIC MATERIAL SUPPORTED BETWEEN SAID END DISC COAXIALLY TO THE SAID SHAFT, A FILTRATE VALVE PLATE FIXED AT ONE END OF THE DRUM,SAID DRUM BEING FILLED WITH A RIGID PLASTIC FOAM ADHESIVLELY SECURED TO THE INTERIOR OF THE DRUM AND TO SAID SHAFT AND RIGIDLY INTERCONNECTING THE CYLINDRICAL DRUM WALL AND THE RIGID SHAFT, AND FILTRATE PASSAGES FORMED IN AND EXTENDING THROUGH SAID FOAM FROM SAID CYLINDRICAL WALL TO SAID VALVE PLATE AND OPENING THROUGH BOTH SAID WALL AND SAID VALVE PLATE.
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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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |