US5401901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weather-resistant electromagnetic interference shielding for electronic equipment enclosures
Assignee: W.L. Gore and Associates Inc
•
Filing: 1991-09-19
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Granted: 1995-03-28
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Expires: 2011-09-19
Abstract
Abstract Weather-resistant electromagnetic radiation shielding materials and structures for electromagnetic interference attenuation for electronic equipment situated in unshielded outdoor housings are described.
Inventors
- 👤 Michael Gerry
- 👤 David Z. Kelly
- 👤 Michael G. Ryan
- 👤 Thomas E. Dykes
- 👤 Robert Sassa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:24
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/20; B32B27/205; B32B7/00; B32B7/02; B32B27/06; B32B27/08; B32B27/12; B32B27/32; B32B27/322; B32B5/00; B32B5/02; B32B5/022; B32B5/024; B32B7/04; B32B7/12; B32B7/14; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01B1/24; H01Q; H01Q17/00; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/212; B32B2307/70; B32B2307/712; B32B2327/00; B32B2327/12; B32B2327/18; B32B2457/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/109; Y10T442/116; Y10T442/30; Y10T442/3065; Y10T442/3089; Y10T442/3106; Y10T442/3382; Y10T442/3407; Y10T442/3854; Y10T442/3878
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
55 words
A flexible composite material comprising, (i) a layer of flexible electrically-conductive material to each side of which is adhered; (ii) at least one layer of porous polytetrafluoroethylene material by means of; (iii) thermoplastic polymer adhesives; wherein said composite material includes means to electrically ground it to serve as a weather-resistant laminate providing electromagnetic radiation shielding.
Claim 2
Dependent Claim
55 words
A flexible composite material comprising, (i) a layer of flexible electrically-conductive material to each side of which is adhered; (ii) at least one layer of porous polytetrafluoroethylene material by means of; (iii) thermoplastic polymer adhesives; wherein said composite material includes means to electrically ground it to serve as a weather-resistant laminate providing electromagnetic radiation shielding.
Claim 3
Dependent Claim
22 words
The composite material as recited in claim 1, wherein the layer of electrically-conductive material (i) is porous polytetrafluoroethylene containing electrically-conductive filler particles.
Claim 4
Dependent Claim
16 words
The composite material as recited in claim 2, wherein the electrically-conductive filler particles are carbon black.
Claim 5
Dependent Claim
19 words
The composite material as recited in claim 1, wherein the layer of electrically-conductive material (i) is metallized porous polytetrafluoroethylene.
Claim 6
Dependent Claim
29 words
The composite material as recited in claim 1, wherein the layered porous polytetrafluoroethylene material is selected from (a) woven fabric of polytetrafluoroethylene fibers or (b) porous expanded polytetrafluoroethylene membrane.
Claim 7
Dependent Claim
23 words
The composite material as recited in claim 1 or 5, wherein at least one of the thermoplastic adhesives (iii) is a non-porous film.
Claim 8
Dependent Claim
20 words
The composite material as recited in claim 6, wherein the thermoplastic polymer adhesive is a fluorinated ethylene propylene (FEP) copolymer.
Claim 9
Dependent Claim
25 words
The composite material as recited in claim 1, wherein the layer of electrically-conductive material (i) is a fabric having a surface coated with crystalline metal.
Claim 10
Dependent Claim
29 words
The composite material as recited in claim 1, wherein the layer of electrically-conductive material is crystalline metal wire mesh or metallized cloth having a surface coated with crystalline metal.
Claim 11
Dependent Claim
28 words
The composite material as recited in claim 1, wherein the composite material comprises a weather-resistant electromagnetic radiation panel adapted for attachment to an unshielded housing for electronic equipment.
Claim 12
Dependent Claim
22 words
The composite material as recited in claim 1, wherein the composite material comprises a weather-resistant electromagnetic radiation shielding housing for electronic equipment.
Claim 13
Dependent Claim
49 words
The flexible composite material as recited in claim 1, wherein said layer of electrically-conductive material is metallized fabric having a surface coated with crystalline metal and said layered porous polytetrafluoroethylene material is selected from the group consisting of woven fabric of expanded polytetrafluoroethylene fibers and porous expanded polytetrafluoroethylene membrane.
Claim 14
Dependent Claim
65 words
A flexible composite material consisting essentially of adhered layers of: (a) at least one layer comprising polytetrafluoroethylene fibers; (b) at least one layer of porous membrane; (c) at least one non-porous layer of thermoplastic polymer; and (d) at least one layer of flexible electrically-conductive material; wherein said composite material includes means to electrically ground it to serve as a weather-resistant laminate providing electromagnetic radiation shielding.
Claim 15
Dependent Claim
65 words
A flexible composite material consisting essentially of adhered layers of: (a) at least one layer comprising polytetrafluoroethylene fibers; (b) at least one layer of porous membrane; (c) at least one non-porous layer of thermoplastic polymer; and (d) at least one layer of flexible electrically-conductive material; wherein said composite material includes means to electrically ground it to serve as a weather-resistant laminate providing electromagnetic radiation shielding.
Claim 16
Dependent Claim
25 words
The composite material as recited in claim 13, wherein said at least one layer of electrically-conductive material (d) is porous polytetrafluoroethylene containing electrically-conductive filler particles.
Claim 17
Dependent Claim
22 words
The composite material as recited in claim 13, wherein said at least one layer of electrically-conductive material (d) is metallized porous polytetrafluoroethylene.
Claim 18
Dependent Claim
28 words
The composite material as recited in claim 13, wherein said at least one layer of electrically-conductive material (d) is a fabric having a surface coated with crystalline metal.
Claim 19
Dependent Claim
33 words
The composite material as recited in claim 13, wherein said at least one layer of electrically-conductive material (d) is crystalline metal wire mesh or metallized cloth having a surface coated with crystalline metal.
Claim 20
Dependent Claim
19 words
The composite material as recited in claim 13, 14, 15, 16, or 17, wherein said thermoplastic polymer is fluoropolymer.
Claim 21
Dependent Claim
39 words
The composite material as recited in claim 18, wherein (a) the polytetrafluoroethylene fibers consist essentially of porous expanded polytetrafluoroethylene fibers; (b) the porous membrane is porous expanded polytetrafluoroethylene; and (c) the thermoplastic polymer consists of fluorinated ethylene propylene (FEP).
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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) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |