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US5227221A
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Patterned skid preventative sheet
Assignee: 3M Innovative Properties Co
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Filing: 1991-01-24
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Granted: 1993-07-13
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Expires: 2011-01-24
Abstract
Abstract A polymeric base sheet has a plurality of protuberances and valleys located on a first side of the base sheet. A layer of bonding material is located on a top surface of the protuberances and is substantially absent from the valleys located between the protuberances. A plurality of skid-preventative particles are secured to the layer of bonding material so as to be substantially absent from the valleys. A sheet of this construction allows the skid-preventative particles to be used in a more efficient manner than heretofore known. By placing the skid-preventative particles exclusively on the protuberances of the base sheet, less particles need to be employed to obtain the skid-preventative surface.
Inventors
- 👤 Thomas P. Hedblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:10
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00605; B29D11/00615; B05; B05C; B05C1/00; B05C1/04; B05C1/08; B05C1/12; B05D; B05D1/00; B05D1/28; E; E01; E01F; E01F9/00; E01F9/50; E01F9/506; E01F9/512; E01F9/576; E01F9/578; G; G02; G02B; G02B5/00; G02B5/12; G02B5/126; G02B5/128; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24479; Y10T428/2457; Y10T428/24612; Y10T428/25; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A skid preventative sheet, which comprises: (a) a resilient polymeric base sheet having a front surface; (b) a plurality of a integral protuberances projecting from the front surface, there being a plurality of such protuberances across the width and down the length of the front surface of the polymeric base sheet; (c) a discontinuous layer of bonding material being located on the protuberances and being substantially absent from the front surface in the regions between the protuberances; and (d) a plurality of skid preventative particles partially embedded in the layer of bonding material and being substantially absent from the front surface in the regions between the protuberances.
Claim 2
Dependent Claim
107 words
A skid preventative sheet, which comprises: (a) a resilient polymeric base sheet having a front surface; (b) a plurality of a integral protuberances projecting from the front surface, there being a plurality of such protuberances across the width and down the length of the front surface of the polymeric base sheet; (c) a discontinuous layer of bonding material being located on the protuberances and being substantially absent from the front surface in the regions between the protuberances; and (d) a plurality of skid preventative particles partially embedded in the layer of bonding material and being substantially absent from the front surface in the regions between the protuberances.
Claim 3
Dependent Claim
26 words
The skid preventative sheet of claim 1, wherein the protuberances are substantially identical and are disposed in a substantially regular repeating pattern upon the base sheet.
Claim 4
Dependent Claim
18 words
The skid preventative sheet of claim 2, wherein the protuberances have a height at from 1.0 to 2.5mm.
Claim 5
Dependent Claim
71 words
A sheet which comprises: (a) a polymeric base sheet having a plurality of protuberances and valleys located on a first side of the polymeric base sheet; (b) a layer of bonding material being located on a top surface of the protuberances and being substantially absent from the valleys; and (c) a plurality of skid preventative particles being secured to the layer of bonding material and being substantially absent from the valleys.
Claim 6
Dependent Claim
71 words
A sheet which comprises: (a) a polymeric base sheet having a plurality of protuberances and valleys located on a first side of the polymeric base sheet; (b) a layer of bonding material being located on a top surface of the protuberances and being substantially absent from the valleys; and (c) a plurality of skid preventative particles being secured to the layer of bonding material and being substantially absent from the valleys.
Claim 7
Dependent Claim
37 words
The sheet of claim 4, wherein the protuberances and valleys are integral with the base sheet, and the skid preventative particles are partially embedded in the layer of bonding material on the top surface of the protuberances.
Claim 8
Dependent Claim
25 words
A method of applying a skid preventative sheet to a roadway, which comprises placing the skid preventative sheet of claim 1 on the roadway surface.
Claim 9
Dependent Claim
25 words
A method of covering at least a portion of a road with a sheet, which comprises: placing the sheet of claim 4 on the road.
Claim 10
Dependent Claim
16 words
The method of claim 6, wherein the skid preventative sheet is placed on a pavement surface.
Claim 11
Dependent Claim
14 words
The method of claim 7, wherein the sheet is placed on a pavement surface.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |