Patent US3139404A successfully refreshed from Google Patents.
US3139404A
Expired / Lapsed
US
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Filter structure
Assignee: Bird Machine Co Inc
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Filing: 1961-02-10
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Granted: 1964-06-30
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Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Irwin R Stock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:47
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/17; B01D33/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A ROTARY FILTER APPARATUS COMPRISING A MULTIPLICITY OF FILTER CELLS HAVING UNDERSTRUCTURES AND HORIZONTALLY DISPOSED IN A CIRCULAR ARRAY, INNER AND OUTER CIRCULAR XXX FRAME ELEMENTS, EACH CELL EXTENDING BETWEEN AND PIVOTALLY MOUNTED ON LONGITUDINAL SHAFT MEANS TO SAID CAR FRAME ELEMENTS TO TILT ABOUT THE LONGITUDINAL AXIS OF THE CELL FROM A FILTERING POSITION TO A DISCHARGE POSITION, MEANS FOR TILTING SAID CELLS, THE INNER AND OUTER CAR FRAME ELEMENTS BEING CONNECTED TOGETHER, THE ENTIRE STRUCTURE BEING MOUNTED TO ROTATE, AND MEANS FOR APPLYING DRIVING FORCES TO AT LEAST ONE OF SAID CAR FRAME ELEMENTS TO ROTATE SAID STRUCTURE, CHARACTERIZED IN THAT THE CAR FRAME ELEMENTS
Claim 2
Dependent Claim
107 words
A ROTARY FILTER APPARATUS COMPRISING A MULTIPLICITY OF FILTER CELLS HAVING UNDERSTRUCTURES AND HORIZONTALLY DISPOSED IN A CIRCULAR ARRAY, INNER AND OUTER CIRCULAR XXX FRAME ELEMENTS, EACH CELL EXTENDING BETWEEN AND PIVOTALLY MOUNTED ON LONGITUDINAL SHAFT MEANS TO SAID CAR FRAME ELEMENTS TO TILT ABOUT THE LONGITUDINAL AXIS OF THE CELL FROM A FILTERING POSITION TO A DISCHARGE POSITION, MEANS FOR TILTING SAID CELLS, THE INNER AND OUTER CAR FRAME ELEMENTS BEING CONNECTED TOGETHER, THE ENTIRE STRUCTURE BEING MOUNTED TO ROTATE, AND MEANS FOR APPLYING DRIVING FORCES TO AT LEAST ONE OF SAID CAR FRAME ELEMENTS TO ROTATE SAID STRUCTURE, CHARACTERIZED IN THAT THE CAR FRAME ELEMENTS
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |