US3993932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic footwear
Assignee: Individual
•
Filing: 1976-01-16
•
Granted: 1976-11-23
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Expires: 1996-01-16
Abstract
Abstract Antistatic footwear uses a conductive layer above a bottom dielectric layer and extending to the peripheral edge of of the bottom layer to form a discharge edge emitting at least a portion of the static electricity built up with movement of the wearer. The discharge automatically keeps the electrostatic charge to a relatively low level, either eliminating or reducing the intensity of any spark occurring when the wearer touches a grounded object, and yet the wearer is preferably insulated from ground to prevent hazardous electrical grounding of the wearer. The static electric potential on the wearer can be lowered further by forming a conductive path from the conductive layer to the underside of the bottom layer.
Inventors
- 👤 John W. Weigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:12
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/36
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
59 words
Antistatic footwear comprising: a. dielectric material forming a bottom layer of said footwear; b. an electrically conductive material above said bottom layer; c. said conductive material extending to the outer periphery of said bottom layer; and d. said conductive material having a discharge edge exposed to ambient atmosphere in the region of said outer periphery of said bottom layer.
Claim 2
Dependent Claim
59 words
Antistatic footwear comprising: a. dielectric material forming a bottom layer of said footwear; b. an electrically conductive material above said bottom layer; c. said conductive material extending to the outer periphery of said bottom layer; and d. said conductive material having a discharge edge exposed to ambient atmosphere in the region of said outer periphery of said bottom layer.
Claim 3
Dependent Claim
16 words
The footwear of claim 1 wherein said conductive material is woven and includes electrically conductive strands.
Claim 4
Dependent Claim
17 words
The footwear of claim 2 wherein said discharge edge is formed of the ends of said strands.
Claim 5
Dependent Claim
13 words
The footwear of claim 1 wherein said conductive material is a metal foil.
Claim 6
Dependent Claim
13 words
The footwear of claim 1 wherein said conductive material is a vacuum-deposited metal.
Claim 7
Dependent Claim
17 words
The footwear of claim 1 wherein said conductive material comprises stitches formed of an electrically conductive strand.
Claim 8
Dependent Claim
20 words
The footwear of claim 1 wherein said discharge edge has an effective radius of curvature of less than 125 microns.
Claim 9
Dependent Claim
18 words
The footwear of claim 1 wherein said bottom layer has a resistivity of at least 10 6 ohm-cm.
Claim 10
Dependent Claim
20 words
The footwear of claim 1 including dielectric material arranged for insulating said conductive material from a foot in said footwear.
Claim 11
Dependent Claim
26 words
The footwear of claim 9 wherein said insulation between said foot and said conductive material has a resistivity of at least 5 × 10 6 ohm-cm.
Claim 12
Dependent Claim
18 words
The footwear of claim 1 wherein said conductive material is superposed over substantially all of said bottom layer.
Claim 13
Dependent Claim
21 words
The footwear of claim 1 wherein said discharge edge extends around substantially all of said outer periphery of said bottom layer.
Claim 14
Dependent Claim
24 words
The footwear of claim 1 including means for forming an electrically conductive path from said conductive material to the underside of said bottom layer.
Claim 15
Dependent Claim
61 words
A laminated, antistatic shoe bottom material comprising: a. a dielectric material forming a bottom layer; b. an electrically conductive material above said bottom layer; c. said conductive material extending to the outer periphery of said bottom layer; and d. said conductive material having a discharge edge exposed to ambient atmosphere in the region of said outer periphery of said bottom layer.
Claim 16
Dependent Claim
61 words
A laminated, antistatic shoe bottom material comprising: a. a dielectric material forming a bottom layer; b. an electrically conductive material above said bottom layer; c. said conductive material extending to the outer periphery of said bottom layer; and d. said conductive material having a discharge edge exposed to ambient atmosphere in the region of said outer periphery of said bottom layer.
Claim 17
Dependent Claim
18 words
The shoe bottom material of claim 14 wherein said conductive material is woven and includes electrically conductive strands.
Claim 18
Dependent Claim
19 words
The shoe bottom material of claim 15 wherein said discharge edge is formed of the ends of said strands.
Claim 19
Dependent Claim
15 words
The shoe bottom material of claim 14 wherein said conductive material is a metal foil.
Claim 20
Dependent Claim
15 words
The shoe bottom material of claim 14 wherein said conductive material is a vacuum-deposited metal.
Claim 21
Dependent Claim
22 words
The shoe bottom material of claim 14 wherein said discharge edge has an effective radius of curvature of less than 125 microns.
Claim 22
Dependent Claim
20 words
The shoe bottom material of claim 14 wherein said bottom layer has a resistivity of at least 10 6 ohm-cm.
Claim 23
Dependent Claim
26 words
The shoe bottom material of claim 14 including means for forming an electrically conductive path from said conductive material to the underside of said bottom layer.
Claim 24
Dependent Claim
52 words
A laminated, antistatic shoe bottom material comprising: a. a dielectric material forming a bottom layer; b. an electrically conductive material above said bottom layer; c. a dielectric material above said conductive material; and d. means for forming an electrically conductive path from said conductive material to the underside of said bottom layer.
Claim 25
Dependent Claim
52 words
A laminated, antistatic shoe bottom material comprising: a. a dielectric material forming a bottom layer; b. an electrically conductive material above said bottom layer; c. a dielectric material above said conductive material; and d. means for forming an electrically conductive path from said conductive material to the underside of said bottom layer.
Claim 26
Dependent Claim
57 words
Antistatic footwear comprising: a. dielectric material forming a bottom layer of said footwear; b. an electrically conductive material above said bottom layer; c. dielectric material arranged for insulating said conductive material from a foot in said footwear; and d. means for forming an electrically conductive path from said conductive material to the underside of said bottom layer.
Claim 27
Dependent Claim
57 words
Antistatic footwear comprising: a. dielectric material forming a bottom layer of said footwear; b. an electrically conductive material above said bottom layer; c. dielectric material arranged for insulating said conductive material from a foot in said footwear; and d. means for forming an electrically conductive path from said conductive material to the underside of said bottom layer.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |