Patent US5478372A successfully refreshed from Google Patents.
US5478372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature, chemical resistant laminate for filtration systems
Assignee: W.L. Gore and Associates Inc
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Filing: 1995-02-08
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Granted: 1995-12-26
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Expires: 2015-02-08
Abstract
Abstract A self-supporting laminate formed from an expanded polytetrafluoroethylene membrane material and a coated metal mesh material is described that is self-supporting and can be formed into a pleated filter member.
Inventors
- 👤 Stephen K. Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:58
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/086; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B01D39/14; B01D39/16; B01D39/1692; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/52; B01D46/521; B01D69/00; B01D69/10; B01D69/108; B01D71/00; B01D71/06; B01D71/30; B01D71/32; B01D71/36; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4618; B07B1/4663; B07B1/4672; B32B1/00; B32B15/02; B32B15/18; B32B27/00; B32B27/32; B32B27/322; B32B3/00; B32B3/26; B32B3/28; B32B5/00; B32B5/22; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0492; B01D2275/00; B01D2275/10; B32B2311/00; B32B2311/30; B32B2327/00; B32B2327/12; B32B2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/139; Y10T428/1393; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249962; Y10T428/249964; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/109; Y10T442/126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
29 words
A filter laminate comprising: (a) a stretched porous polytetrafluoroethylene membrane; and (b) a metallic mesh containing a coating of polyether ether ketone on the metal wires of the mesh.
Claim 2
Dependent Claim
29 words
A filter laminate comprising: (a) a stretched porous polytetrafluoroethylene membrane; and (b) a metallic mesh containing a coating of polyether ether ketone on the metal wires of the mesh.
Claim 3
Dependent Claim
13 words
The filter laminate of claim 1 wherein the metallic mesh is stainless steel.
Claim 4
Dependent Claim
12 words
The filter laminate of claim 1 wherein the filter laminate is pleated.
Claim 5
Dependent Claim
16 words
The filter laminate of claim 1 wherein the laminate is in the form of a cylinder.
Claim 6
Dependent Claim
19 words
The filter laminate of claim 1 wherein the laminate is pleated and is in the form of a cylinder.
Claim 7
Independent Claim
55 words
A method of preparing a filter laminate comprising: (a) providing a metal mesh material; (b) coating the metal mesh with a layer of polyether ether ketone so that the interstices between adjacent wires of said mesh remain open for gas flow; and (c) laminating a layer of stretched porous polytetrafluoroethylene to said coated metal mesh.
Claim 8
Independent Claim
55 words
A method of preparing a filter laminate comprising: (a) providing a metal mesh material; (b) coating the metal mesh with a layer of polyether ether ketone so that the interstices between adjacent wires of said mesh remain open for gas flow; and (c) laminating a layer of stretched porous polytetrafluoroethylene to said coated metal mesh.
Claim 9
Dependent Claim
12 words
A method according to claim 6 wherein the coating is electrostatically applied.
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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) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |