Patent US3306460A successfully refreshed from Google Patents.
US3306460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire wound filter with underlying peripherally spaced cover elements
Assignee: Improved Machinery Inc
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Filing: 1966-06-28
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Granted: 1967-02-28
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Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 Luthi Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:22
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/067; B01D33/073; B01D33/09; B01D33/44; B01D33/46; B01D33/465; B01D33/80; B01D33/82; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A ROTARY DRUM FILTER INCLUDING A CYLINDRICAL DRUM, A PLURALITY OF AXIALLY EXTENDING AND RADIALLY UPSTANDING IMPERFORATE RIB ELEMENTS SPACED FROM ONE ANOTHER TO DEFINE A PLURALITY OF AXIALLY EXTENDING FILTRATE COMPARTMENTS ON THE SURFACE OF SAID DRUM THROUGHOUT ITS CIRCUMFERENCE, A PLURALITY OF AXIALLY AND PERIPHERALLY EXTENDING COVER ELEMENTS HAVING AN INNER SURFACE SUPPORTED ON THE OUTER EDGES OF SAID RIB ELEMENTS TO PROVIDE A COVER FOR THE MAJOR ARCUATE PORTION OF SAID FILTRATE COMPARTMENTS THROUGHOUT THE SURFACE OF SAID DRUM, EACH SAID COVER ELEMENT HAVING AN ARCUATE EXTENT LESS THAN THAT OF A SAID FILTRATE COMPARTMENT, WITH ADJACENT COVER ELEMENTS SPACED FROM ONE ANOTHER IN A
Claim 2
Dependent Claim
108 words
A ROTARY DRUM FILTER INCLUDING A CYLINDRICAL DRUM, A PLURALITY OF AXIALLY EXTENDING AND RADIALLY UPSTANDING IMPERFORATE RIB ELEMENTS SPACED FROM ONE ANOTHER TO DEFINE A PLURALITY OF AXIALLY EXTENDING FILTRATE COMPARTMENTS ON THE SURFACE OF SAID DRUM THROUGHOUT ITS CIRCUMFERENCE, A PLURALITY OF AXIALLY AND PERIPHERALLY EXTENDING COVER ELEMENTS HAVING AN INNER SURFACE SUPPORTED ON THE OUTER EDGES OF SAID RIB ELEMENTS TO PROVIDE A COVER FOR THE MAJOR ARCUATE PORTION OF SAID FILTRATE COMPARTMENTS THROUGHOUT THE SURFACE OF SAID DRUM, EACH SAID COVER ELEMENT HAVING AN ARCUATE EXTENT LESS THAN THAT OF A SAID FILTRATE COMPARTMENT, WITH ADJACENT COVER ELEMENTS SPACED FROM ONE ANOTHER IN A
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |