US5229200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static dissipative nonwoven textile material
Assignee: W.L. Gore and Associates Inc
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Filing: 1992-09-29
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Granted: 1993-07-20
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Expires: 2012-09-29
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
2026-10-25 06:52
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: 6
Claim 1
Independent Claim
53 words
A nonwoven fabric laminate comprising in sequence; a) a static dissipative nonwoven textile material comprising: an electrically conductive polytetrafluoroethylene fiber intermixed with at least one other synthetic organic fluorocarbon fiber wherein the static dissipative nonwoven textile material has a static dissipation time of 0.5 seconds or less, and b) a porous polymeric membrane.
Claim 2
Dependent Claim
53 words
A nonwoven fabric laminate comprising in sequence; a) a static dissipative nonwoven textile material comprising: an electrically conductive polytetrafluoroethylene fiber intermixed with at least one other synthetic organic fluorocarbon fiber wherein the static dissipative nonwoven textile material has a static dissipation time of 0.5 seconds or less, and b) a porous polymeric membrane.
Claim 3
Dependent Claim
40 words
A nonwoven fabric laminate as described in claim 1 wherein the porous polymeric membrane is selected from the group consisting of nitrocellulose, triacetyl cellulose, polyamide, polyurethane, polycarbonate, polyethylene, polypropylene, polytetrafluoroethylene, polysulfone, polyvinyl chloride, polyvinylidine fluoride, acrylate copolymer and methacrylate copolymer.
Claim 4
Dependent Claim
18 words
A nonwoven fabric laminate as described in claim 1 wherein the porous polymeric membrane is expanded porous polytetrafluoroethylene.
Claim 5
Dependent Claim
16 words
A nonwoven fabric laminate as described in claim 1 in the form of a filter bag.
Claim 6
Dependent Claim
16 words
A nonwoven fabric laminate 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) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |