Patent US4948443A successfully refreshed from Google Patents.
US4948443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic laminate repair
Assignee: Individual
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Filing: 1989-02-22
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Granted: 1990-08-14
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Expires: 2009-02-22
Abstract
Abstract A process for repairing plastic laminates comprising cleaning the damaged areas and filling the same with a suitably colored patch material. Preferably the patch material comprises a mixture of an aqueous dispersion of a vinyl acetate homopolymer with an aqueous dispersion of a vinly acetate/acrylic copolymer, together with a color pigment, and a filler. Desirable additonal ingredients to the patch material include an aqueous polyurethane dispersion and a thickening agent. An initial foundation base layer comprising an epoxy material may be applied to the damaged area before the patch material is applied. After drying and smoothing, the surface of the patch may be decorated with a design to match the undamaged area, and a clear coat of polyurethane is applied to the patch.
Inventors
- 👤 Lawrence Speer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:40
CPC Classifications
B; B32; B32B; B32B43/00; B29; B29C; B29C73/00; B29C73/04; B29C73/10; Y; Y10; Y10T; Y10T428/00; Y10T428/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
A process for restoring plastic laminate structures having unwanted void areas in the surface thereof comprising the steps of: cleaning the void areas preparatory to their filling; thereafter filling the void areas with patch materials; and applying protective topcoatings to the exposed surface of the fillings, wherein said cleaning comprises removing loose and adventitious material from said voids, and wherein said patch materials comprise (1) a member selected from the group consisting of vinyl acetate/acrylic copolymers, vinyl acetate homopolymers, and mixtures of vinyl acetate/acrylic copolymers with said vinyl acetate homopolymers, together with (2) inert mineral powders, and (3) color pigments; and wherein further, said topcoatings are polyurethane polymers.
Claim 2
Dependent Claim
108 words
A process for restoring plastic laminate structures having unwanted void areas in the surface thereof comprising the steps of: cleaning the void areas preparatory to their filling; thereafter filling the void areas with patch materials; and applying protective topcoatings to the exposed surface of the fillings, wherein said cleaning comprises removing loose and adventitious material from said voids, and wherein said patch materials comprise (1) a member selected from the group consisting of vinyl acetate/acrylic copolymers, vinyl acetate homopolymers, and mixtures of vinyl acetate/acrylic copolymers with said vinyl acetate homopolymers, together with (2) inert mineral powders, and (3) color pigments; and wherein further, said topcoatings are polyurethane polymers.
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein said vinyl acetate homopolymers and said vinyl acetate copolymers are in the form of aqueous dispersions.
Claim 4
Dependent Claim
19 words
A process according to claim 2 wherein said patch material also contains an aqueous dispersion of a polyurethane polymer.
Claim 5
Dependent Claim
15 words
A process according to claim 1 wherein said patch material also contains a thickening agent.
Claim 6
Dependent Claim
17 words
A process according to claim 1 wherein the polyurethane polymer of said topcoating includes a cross-linking agent.
Claim 7
Dependent Claim
23 words
A process according to claim 1 wherein said member comprises a vinyl acetate homopolymer and a copolymer of vinyl acetate and n-methylol acrylamide.
Claim 8
Dependent Claim
37 words
A process according to claim 1 in which after cleaning the void areas, but prior to filling the void areas with patch material, the void areas are partially filled with a base layer of an epoxy resin.
Claim 9
Dependent Claim
53 words
A process according to claim 1 wherein in the case of restorations involving laminate structures having a surface which includes a decorative design therein, patch material of a desired color is reduced and is used to inscribe a matching design on the surface of the patch, after which said protective topcoating is applied.
Claim 10
Dependent Claim
23 words
A process according to claim 1 wherein said plastic laminate structures are formed by the high pressure lamination of melamine and phenolic plastics.
Claim 11
Dependent Claim
16 words
A process according to claim 1 wherein said inert material powder is a magnesium silicate hydrate.
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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |