Patent US4160331A successfully refreshed from Google Patents.
US4160331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outer shoe with gripping surface
Assignee: Individual
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Filing: 1978-02-21
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Granted: 1979-07-10
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Expires: 1998-02-21
Abstract
Abstract A shoe having a slip resistant or gripping surface on the sole thereof. Preferably, the shoe is an outer shoe, such as a rubber or boot. The gripping surface is applied to the sole in separated, discrete bands within channels in the sole and comprises a mixture of a grit, such as silicon carbide, and an adhesive. The gripping surface is used to prevent or curtail slipping by the wearer on smooth surfaces, such as ice or snow.
Inventors
- 👤 Michael Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:11
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/14; A43B13/22; A43B13/24; A43B3/00; A43B3/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
A shoe having a bottom surface formed from a flexible, water-proof material, said material being selected from the group consisting of natural rubber, synthetic rubber and polyvinyl chloride, said bottom surface having a plurality of discrete channels formed therein, and a gripping material in some, but not all, of said channels, said gripping material comprising an adhesive and a grit, whereby there are discrete areas of said gripping material in said bottom surface.
Claim 2
Dependent Claim
73 words
A shoe having a bottom surface formed from a flexible, water-proof material, said material being selected from the group consisting of natural rubber, synthetic rubber and polyvinyl chloride, said bottom surface having a plurality of discrete channels formed therein, and a gripping material in some, but not all, of said channels, said gripping material comprising an adhesive and a grit, whereby there are discrete areas of said gripping material in said bottom surface.
Claim 3
Dependent Claim
18 words
The shoe of claim 1 wherein said adhesive and grit project below the outer edges of said channels.
Claim 4
Dependent Claim
12 words
The shoe of claim 1 wherein said shoe comprises an outer shoe.
Claim 5
Dependent Claim
28 words
The shoe of claim 1 wherein said discrete areas of adhesive and grit are separated by flexible areas extending across the width of the bottom of said shoe.
Claim 6
Dependent Claim
28 words
The shoe of claim 4 wherein said adhesive and grit areas are additionally separated by flexible areas which extend along the length of the bottom of said shoe.
Claim 7
Dependent Claim
12 words
The shoe of claim 1 wherein said adhesive comprises an epoxy adhesive.
Claim 8
Dependent Claim
11 words
The shoe of claim 1 wherein said grit comprises silicon carbide.
Claim 9
Dependent Claim
25 words
The shoe of claim 1 wherein said gripping surface is formed from a composition comprising approximately 75% adhesive by weight and 25% grit by weight.
Claim 10
Dependent Claim
37 words
The shoe of claim 1 wherein the gripping surface includes an amount of adhesive which is sufficient to bond the grit in place, but which amount is not so great that it would completely encapsulate the grit.
Claim 11
Dependent Claim
24 words
The shoe of claim 1 wherein said channels are formed by dependent walls, and said adhesive and grit are laterally confined within said walls.
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) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |