Patent US4494247A successfully refreshed from Google Patents.
US4494247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knee/elbow guard treated to increase durability and a process for producing same
Assignee: Kranos IP III Corp
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Filing: 1981-12-28
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Granted: 1985-01-22
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Expires: 2001-12-28
Abstract
Abstract A portion of the exterior surface material of a knee-elbow protective guard is covered with a treatment mix comprising 4 parts of a polytetrafluorethylene/resin dispersion, one part of an acrylic polymer resin and 5% of a solution of ammonium sulfate. The treatment mix is then applied to the exterior surface material by a silk screening process, and cured by application of heat so that it bonds to the fibers of the exterior surface material of the guard. The treated portion of the resulting protective guard has a substantially lower coefficient of friction than the exterior surface material of an untreated protective guard.
Inventors
- 👤 Michael J. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:25
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/055; A41D13/0556; A41D13/0568; A41D13/06; A41D13/065; A63; A63B; A63B71/00; A63B71/08; A63B71/12; A63B71/1225; D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; A63B2071/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A protective article with enhanced durability for use on a human limb, comprising: a protective guard element which includes an outer fabric section, wherein a selected portion of the fabric section is treated with a protective material in such a manner that a thin film of said protective material is fixed to the selected portion of the fabric section, the protective material having a coefficient of friction which is substantially lower than that of conventional fabrics used for the fabric section, such as nylon.
Claim 2
Dependent Claim
84 words
A protective article with enhanced durability for use on a human limb, comprising: a protective guard element which includes an outer fabric section, wherein a selected portion of the fabric section is treated with a protective material in such a manner that a thin film of said protective material is fixed to the selected portion of the fabric section, the protective material having a coefficient of friction which is substantially lower than that of conventional fabrics used for the fabric section, such as nylon.
Claim 3
Dependent Claim
38 words
The article of claim 1, including means for bonding the protective material to a base surface material on said protective guard sufficiently to substantially prevent the protective material from separating from the base surface material during washing thereof.
Claim 4
Dependent Claim
19 words
The article of claim 2, wherein the base surface material is the exterior surface material of the protective guard.
Claim 5
Dependent Claim
26 words
The article of claim 3, wherein the protective material substantially coats the individual fibers and the interstices thereof of said portion of the exterior surface material.
Claim 6
Dependent Claim
48 words
The article of claim 4, wherein the protective article is for use on a joint, such as the elbow or knee, and wherein said portion of the exterior surface material which is coated with the protective material is sufficient to cover the joint and the immediate surrounding area.
Claim 7
Dependent Claim
23 words
The article of claim 1, wherein the protective material is polytetrafluorethylene, and wherein the bonding means is ammonium sulfate and an acrylic polymer.
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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |