Patent US5166873A successfully refreshed from Google Patents.
US5116650A
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Dioxole/tfe copolymer composites
Assignee: W.L. Gore and Associates Inc
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Filing: 1990-12-03
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Granted: 1992-05-26
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Expires: 2010-12-03
Abstract
Abstract A gas permeable material comprising a material having continuous pores through it, in which the pore interiors are coated with an amorphous copolymer of tetrafluoroethylene and perfluoro-2,2-dimethyl-1,3-dioxole.
Inventors
- 👤 John Bowser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:18
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0088; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/18; B01D71/00; B01D71/06; B01D71/44; B01D71/76; B01D71/30; B01D71/32; B01D71/36; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/131; Y10T428/1314; Y10T428/1317; Y10T428/1321; Y10T428/1352; Y10T428/1362; Y10T428/1376; Y10T428/139; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249959; Y10T428/249978; Y10T428/249979; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172; Y10T442/2189
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
39 words
A gas permeable material that contains passageways through the material, said material containing on at least a portion of the interior of the passageways an amorphous copolymer of 10-40 mole percent tetrafluoroethylene and complementally 90-60 mole percent of perfluoro-2,2-dimethyl-1,3-dioxole.
Claim 2
Dependent Claim
39 words
A gas permeable material that contains passageways through the material, said material containing on at least a portion of the interior of the passageways an amorphous copolymer of 10-40 mole percent tetrafluoroethylene and complementally 90-60 mole percent of perfluoro-2,2-dimethyl-1,3-dioxole.
Claim 3
Dependent Claim
36 words
The gas permeable material of claim 1 wherein the material is a sheet selected from the class consisting of woven fabric, nonwoven fabric, knit fabric, porous polymeric sheets having a microstructure, cellulosic papers, and fiberglass papers.
Claim 4
Dependent Claim
13 words
The gas permeable material of claim 2 wherein the material is porous PTFE.
Claim 5
Dependent Claim
17 words
The gas permeable material of claim l wherein the material is in the form of a plug.
Claim 6
Dependent Claim
17 words
The gas permeable material of claim 1 wherein the material is in the form of a tube.
References Cited (Backward Citations)
US4754009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |