US4662972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a non-skid surfaced structure
Assignee: THOM-MCI Inc A CORP OF CA
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Filing: 1985-03-25
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Granted: 1987-05-05
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Expires: 2005-03-25
Abstract
Abstract The present invention defines methods of forming a non-skid surface on a base member, wherein the base member may consist of a wood, plastic, metal or concrete surface structure. One method includes applying one or more coats or layers of epoxy resin to one surface of a wood base member. After the epoxy resin is set, a first coat of polyurethane is applied thereover at a thickness determined by the size of the grit material that is disseminated in the first coat of polyurethane, whereby the upper portion of the grit is exposed so as to be covered by a second polyurethane coat applied over the first coat of polyurethane, the grit being locked within and between the two coats of polyurethane. An additional method includes the step of affixing a fiber/cement panel to the base member and applying the first polyurethane coat to the surface of the fiber/cement panel, followed thereafter by the grit and the second coat of polyurethane, whereby a non-skid surface is established thereon.
Inventors
- 👤 Thomas L. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:00
CPC Classifications
B; B32; B32B; B32B13/00; B32B13/04; B32B13/10; E; E04; E04F; E04F15/00; E04F15/02; E04F15/02172; E04F15/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24942; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
286 words
A method of forming a non-skid-surfaced plywood panel having a permanent but flexible bond between said plywood and the non-skid elements thereof, wherein the method comprises the steps of: providing a sheet of plywood having a substantially flat surface; applying to said surface thereof a first coat of low-viscosity, catalyzed, epoxy resin so as to penetrate and seal said surfaces; applying a second coat of a catalyzed epoxy resin to said surface of said plywood panel prior to the drying of said first coat of epoxy resin, said second coat having a higher viscosity than said first coat; providing a fiber/cement panel having substantially the same configuration as said plywood panel; applying a third coat consisting of the same catalyzed epoxy resin used in said second coat to one surface of said fiber/cement panel; placing said coated surfaces of each panel into opposing engagement with each other; applying pressure to said panels, whereby excess epoxy material is forced from between said panels; allowing said epoxy between said panels to dry; applying at a predetermined thickness a first coat of polyurethane material to form a surface layer over the exposed surface of said fiber/cement panel; disseminating a hard grit material over said first coat while said polyurethane material is still in a wet stage, said grit material being of a size greater than the thickness of said first coat, so as to allow a portion of said grit to be exposed above the surface of said first coat; allowing said first polyurethane coat to dry; and applying a second coat of polyurethane material over said first coat of polyurethane material so as to encapsulate said grit material, whereby said grit material is secured to said fiber/cement panel.
Claim 2
Independent Claim
286 words
A method of forming a non-skid-surfaced plywood panel having a permanent but flexible bond between said plywood and the non-skid elements thereof, wherein the method comprises the steps of: providing a sheet of plywood having a substantially flat surface; applying to said surface thereof a first coat of low-viscosity, catalyzed, epoxy resin so as to penetrate and seal said surfaces; applying a second coat of a catalyzed epoxy resin to said surface of said plywood panel prior to the drying of said first coat of epoxy resin, said second coat having a higher viscosity than said first coat; providing a fiber/cement panel having substantially the same configuration as said plywood panel; applying a third coat consisting of the same catalyzed epoxy resin used in said second coat to one surface of said fiber/cement panel; placing said coated surfaces of each panel into opposing engagement with each other; applying pressure to said panels, whereby excess epoxy material is forced from between said panels; allowing said epoxy between said panels to dry; applying at a predetermined thickness a first coat of polyurethane material to form a surface layer over the exposed surface of said fiber/cement panel; disseminating a hard grit material over said first coat while said polyurethane material is still in a wet stage, said grit material being of a size greater than the thickness of said first coat, so as to allow a portion of said grit to be exposed above the surface of said first coat; allowing said first polyurethane coat to dry; and applying a second coat of polyurethane material over said first coat of polyurethane material so as to encapsulate said grit material, whereby said grit material is secured to said fiber/cement panel.
Claim 3
Dependent Claim
37 words
A method as recited in claim 1, wherein said first coat of polyurethane has a viscosity of between 1100 and 1400 centipoise, and said second coat of polyurethane has a viscosity of between 610 and 700 centipoise.
Claim 4
Dependent Claim
53 words
A method as recited in claim 1, wherein said first coat of said polyurethane is applied having a thickness less than the size of said grit material, whereby the grit particles of said grit material are at least one-third exposed, and said second polyurethane coat covers the exposed portion of said grit particles.
Claim 5
Independent Claim
161 words
A method of forming a non-skid-surface to a base member, wherein grit particles are fixedly secured, the method comprising the steps of: providing a base member having a substantiallly flat surface; adhesively bonding a fiber/cement panel to said base member; applying a first coat of polyurethane to the exposed surface of said fiber/cement panel, said first coat of polyurethane having a predetermined thickness; disseminating hard grit particles over said first coat while said polyurethane is still in a wet stage, said grit particles being formed having a size greater than the thickness of said first coat, so as to allow a portion of said grit particles to be exposed above the surface of said first coat; allowing said first polyurethane coat to dry; and applying a second coat of polyurethane over said first coat thereof, so as to encapsulate said grit particles within said first and second coats of polyurethane, whereby said grit particles are fixedly secured to said fiber/cement panel.
Claim 6
Independent Claim
161 words
A method of forming a non-skid-surface to a base member, wherein grit particles are fixedly secured, the method comprising the steps of: providing a base member having a substantiallly flat surface; adhesively bonding a fiber/cement panel to said base member; applying a first coat of polyurethane to the exposed surface of said fiber/cement panel, said first coat of polyurethane having a predetermined thickness; disseminating hard grit particles over said first coat while said polyurethane is still in a wet stage, said grit particles being formed having a size greater than the thickness of said first coat, so as to allow a portion of said grit particles to be exposed above the surface of said first coat; allowing said first polyurethane coat to dry; and applying a second coat of polyurethane over said first coat thereof, so as to encapsulate said grit particles within said first and second coats of polyurethane, whereby said grit particles are fixedly secured to said fiber/cement panel.
Claim 7
Dependent Claim
31 words
A method as recited in claim 4, wherein said fiber/cement panel consists of: 36 percent Portland cement; 30 percent crushed limestone; 20 percent Possolan volcanic ash; and 14 percent fibrous material.
Claim 8
Dependent Claim
26 words
A method as recited in claim 5, wherein said predetermined thickness of said first coat of polyurethane covers between one-half to two-thirds of said grit particles.
Claim 9
Dependent Claim
37 words
A method as recited in claim 5, wherein said first coat of polyurethane has a viscosity of between 1100 to 1400 centipoise, and wherein said second coat thereof has a viscosity of between 610 to 600 centipoise.
Claim 10
Dependent Claim
14 words
A method as recited in claim 5, wherein said base member consists of plywood.
Claim 11
Dependent Claim
14 words
A method as recited in claim 5, wherein said base member consists of metal.
Claim 12
Dependent Claim
14 words
A method as recited in claim 5, wherein said base member consists of plastic.
References Cited (Backward Citations)
US2009595A
Cited
US3352955A
Cited
US3334555A
Cited
JPS508479A
Cited
GB1560692A
Cited
US4555292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |