US3403786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drum filter
Assignee: Continental Baking Co
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Filing: 1966-08-25
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Granted: 1968-10-01
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Luthi Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/60; B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D33/44; B01D33/46; B01D33/463; B01D33/466
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A ROTARY DRUM FILTER ADAPTED TO BE LOCATED IN A CONTAINER OF PULP STOCK FOR FILTERING PULP STOCK IN SAID CONTAINER, THE COMBINATION OF: AN INNER DRUM MEMBER; AN OUTER DRUM MEMBER EXTENDING PERIPHERALLY AROUND SAID INNER DRUM MEMBER AND SPACED FROM SAID INNER DRUM MEMBER TO PRVIDE A SPACE BETWEEN SAID DRUM MEMBERS PERIPHERALLY AROUND SAID INNER DRUM MEMBER; ROLLING MEANS DISPOSED WITHIN SAID SPACE BETWEEN SAID DRUM MEMBERS FOR SUPPORTING SAID OUTER DRUM MEMBER UPON SAID INNER DRUM MEMBER AND DIVIDING SAID SPACE INTO A PLURALITY OF COMPARTMENTS; ONE OF SAID DRUM MEMBERS BEING CONSTRUCTED TO COLLECT FILTERED STOCK DURING ROTATION; AND MEANS FOR ROTATING SAID ONE OF SAID DRUM MEMBERS.
Claim 2
Dependent Claim
114 words
IN A ROTARY DRUM FILTER ADAPTED TO BE LOCATED IN A CONTAINER OF PULP STOCK FOR FILTERING PULP STOCK IN SAID CONTAINER, THE COMBINATION OF: AN INNER DRUM MEMBER; AN OUTER DRUM MEMBER EXTENDING PERIPHERALLY AROUND SAID INNER DRUM MEMBER AND SPACED FROM SAID INNER DRUM MEMBER TO PRVIDE A SPACE BETWEEN SAID DRUM MEMBERS PERIPHERALLY AROUND SAID INNER DRUM MEMBER; ROLLING MEANS DISPOSED WITHIN SAID SPACE BETWEEN SAID DRUM MEMBERS FOR SUPPORTING SAID OUTER DRUM MEMBER UPON SAID INNER DRUM MEMBER AND DIVIDING SAID SPACE INTO A PLURALITY OF COMPARTMENTS; ONE OF SAID DRUM MEMBERS BEING CONSTRUCTED TO COLLECT FILTERED STOCK DURING ROTATION; AND MEANS FOR ROTATING SAID ONE OF SAID DRUM MEMBERS.
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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |