US4332861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic surface treatment
Assignee: PPG Industries Ohio Inc
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Filing: 1980-11-24
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Granted: 1982-06-01
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Expires: 2000-11-24
Abstract
Abstract A method is disclosed for improving a roughened surface of a plastic article by applying a smooth, durable polymer coating.
Inventors
- 👤 Helmut Franz
- 👤 James H. Hanlon
- 👤 Lloyd G. Shick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:39
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
49 words
A method for treating plastic articles comprising the steps of: a. processing a plastic article whereby a rough surface is produced; and b. coating the rough surface with a clear polymer selected from the group consisting of acrylics, polyurethanes and epoxy resins to provide a smooth, durable transparent finish.
Claim 2
Independent Claim
49 words
A method for treating plastic articles comprising the steps of: a. processing a plastic article whereby a rough surface is produced; and b. coating the rough surface with a clear polymer selected from the group consisting of acrylics, polyurethanes and epoxy resins to provide a smooth, durable transparent finish.
Claim 3
Dependent Claim
19 words
The method according to claim 1, wherein the polymer is selected from the group consisting of acrylics and polyurethanes.
Claim 4
Dependent Claim
15 words
The method according to claim 2, wherein the polymer coating is formed from ethyl acrylate.
Claim 5
Dependent Claim
14 words
The method according to claim 3, wherein the plastic article comprises an acrylic transparency.
Claim 6
Dependent Claim
12 words
The method according to claim 4, wherein the acrylic transparency comprises polymethylmethacrylate.
Claim 7
Independent Claim
72 words
A method for treating a rough surface of a plastic transparency to provide a smooth, durable, transparent finish comprising the steps of: a. applying to the rough surface a solution of a composition capable of curing to form a clear, high gloss polymer film selected from the group consisting of acrylics, polyurethanes and epoxy resins; b. evaporating the solvent; and c. curing the composition to form a clear, high gloss polymer finish.
Claim 8
Independent Claim
72 words
A method for treating a rough surface of a plastic transparency to provide a smooth, durable, transparent finish comprising the steps of: a. applying to the rough surface a solution of a composition capable of curing to form a clear, high gloss polymer film selected from the group consisting of acrylics, polyurethanes and epoxy resins; b. evaporating the solvent; and c. curing the composition to form a clear, high gloss polymer finish.
Claim 9
Dependent Claim
19 words
The method according to claim 6, wherein the polymer is selected from the group consisting of acrylics and polyurethanes.
Claim 10
Dependent Claim
14 words
The method according to claim 7, wherein the polymer is formed from ethyl acrylate.
Claim 11
Dependent Claim
36 words
The method according to claim 8, wherein the rough surface of an acrylic transparency is treated by applying a toluene solution of ethyl acrylate which cures at ambient temperatures to provide a smooth, durable, transparent finish.
Claim 12
Dependent Claim
16 words
An article prepared according to the method of claim 9, wherein the acrylic is poly(methyl methacrylate).
References Cited (Backward Citations)
US3485662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |