Patent US4960448A successfully refreshed from Google Patents.
US4960448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature gas filter
Assignee: UNIVERSAL POROSICS Inc A CORP OF
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Filing: 1989-10-16
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Granted: 1990-10-02
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Expires: 2009-10-16
Abstract
Abstract A high temperature pressure filter utilizes a rigid ceramic support plate separating a pressure tank into respective inlet and outlet pressure chambers. The support plate has a hole therein and a hollow ceramic filter element is disposed in one of the pressure chambers and mounted to the support plate over the hole therein.
Inventors
- 👤 Elizabeth C. Zievers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2407; B01D46/0002; B01D46/0005; B01D46/56; B01D46/58; B01D2273/00; B01D2273/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
In a pressure filter of the type including a pressure tank in which at least one hollow ceramic filter element is positioned in said tank between an inlet to said tank and an outlet from said tank, the combination comprising a rigid ceramic support member mounted in said tank and separating said inlet from said outlet, said member having at least one of hole extending therethrough from one surface thereof to an opposite surface thereof, said filter elements being sealably mounted to said rigid ceramic member over said holes and extending from said one surface, and said inlet and said outlet opening into said tank on respective ones of said surfaces of said rigid ceramic member.
Claim 2
Dependent Claim
116 words
In a pressure filter of the type including a pressure tank in which at least one hollow ceramic filter element is positioned in said tank between an inlet to said tank and an outlet from said tank, the combination comprising a rigid ceramic support member mounted in said tank and separating said inlet from said outlet, said member having at least one of hole extending therethrough from one surface thereof to an opposite surface thereof, said filter elements being sealably mounted to said rigid ceramic member over said holes and extending from said one surface, and said inlet and said outlet opening into said tank on respective ones of said surfaces of said rigid ceramic member.
Claim 3
Dependent Claim
18 words
The combination according to claim 1 wherein said rigid ceramic member is a plate extending across said tank.
Claim 4
Dependent Claim
19 words
The combination according to claim 2 wherein said filter element and said plate have the same coefficient of expansion.
Claim 5
Dependent Claim
22 words
The combination according to claim 3 wherein said filter element and said plate are constituted by a ceramic impregnated ceramic fibrous mat.
Claim 6
Dependent Claim
33 words
The combination according to claim 1 wherein said rigid ceramic member is a vertically disposed tube, and said filter element lies in a horizontal plane and extends radially from said rigid ceramic member.
Claim 7
Dependent Claim
31 words
The combination according to claim 4 wherein said rigid ceramic member is a horizontally disposed tube, and said filter element lies in a vertical plane and extends perpendicularly from said tube.
Claim 8
Dependent Claim
15 words
The combination according to claim 6 wherein said filter element extends upwardly from said tube.
Claim 9
Dependent Claim
15 words
The combination according to claim 7 wherein said filter element extends downwardly from said tube.
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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |