US5324579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static dissipative nonwoven textile material
Assignee: W.L. Gore and Associates Inc
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Filing: 1993-01-19
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Granted: 1994-06-28
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Expires: 2013-01-19
Abstract
Abstract A nonwoven textile material useful in dissipating static electric charges containing an electrically conductive polytetrafluoroethylene fiber. An amount of a synthetic fiber may be intermixed with the electrically conductive polytetrafluoroethylene fiber to produce the static dissipative textile material. The nonwoven static dissipative textile material may combine with a porous polymeric membrane to form nonwoven fabric laminate. The nonwoven textile material is useful as a filtration media and may be fabricated into a filter bag.
Inventors
- 👤 Robert Sassa
- 👤 Richard Winkelmayer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:24
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; A; A41; A41D; A41D31/00; A41D31/04; A41D31/26; A41D31/265; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D2201/00; B01D2201/50; B01D2239/00; B01D2239/02; B01D2239/0241; B01D2239/06; B01D2239/0604; B01D2239/0636; B01D2239/064; B01D2239/065; B01D2239/0659; B01D2239/0668; B01D2239/12; B01D2239/1258; B01D2239/1291; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/197; Y10T442/50; Y10T442/56; Y10T442/60; Y10T442/608; Y10T442/696; Y10T442/697
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
A static dissipative nonwoven textile material comprising: an electrically conductive polytetrafluoroethylene fiber intermixed with at least one other synthetic fiber, wherein the static dissipative nonwoven textile material has a static dissipative time of 0.5 seconds or less; and wherein the percentage of the electrically conductive polytetrafluoroethylene fiber to synthetic fiber is between 1% and 10% by weight.
Claim 2
Dependent Claim
57 words
A static dissipative nonwoven textile material comprising: an electrically conductive polytetrafluoroethylene fiber intermixed with at least one other synthetic fiber, wherein the static dissipative nonwoven textile material has a static dissipative time of 0.5 seconds or less; and wherein the percentage of the electrically conductive polytetrafluoroethylene fiber to synthetic fiber is between 1% and 10% by weight.
Claim 3
Dependent Claim
21 words
A static dissipative nonwoven textile material as described in claim 1 wherein the static dissipative textile material is in felt form.
Claim 4
Dependent Claim
20 words
A static dissipative nonwoven textile material as described in claim 1 wherein the synthetic fiber is an inorganic synthetic fiber.
Claim 5
Dependent Claim
26 words
A static dissipative nonwoven textile material as described in claim 3 wherein the inorganic synthetic fiber is selected from the group consisting of glass and ceramic.
Claim 6
Dependent Claim
20 words
A static dissipative nonwoven textile material as described in claim 1 wherein the synthetic fiber is an organic synthetic fiber.
Claim 7
Dependent Claim
37 words
A static dissipative textile material as described in claim 5 wherein the organic synthetic fiber is selected from the group consisting of polyester, polyamide, polyphenylene sulfide, polypropylene, polyethylene, polyether ether ketone, polyimide, polyacrylonitrile, polyketone, copolyimide and polyaramid.
Claim 8
Dependent Claim
21 words
A static dissipative textile material as described in claim 1 wherein the electrically conductive polytetrafluoroethylene fiber is conductive expanded porous polytetrafluoroethylene.
Claim 9
Dependent Claim
30 words
A static dissipative nonwoven textile material as described in claim 1 wherein the percentage of the electrically conductive polytetrafluoroethylene fiber to synthetic fiber is between 2% and 5% by weight.
Claim 10
Dependent Claim
18 words
A static dissipative nonwoven textile material as described in claim 1 in the form of a filter bag.
Claim 11
Dependent Claim
18 words
A static dissipative nonwoven textile material as described in claim 1 in the form of a filter cloth.
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) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |