US4133912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refinishing of the surfaces of bodies of a thermoplastic
Assignee: Stuart Plastics Ltd
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Filing: 1977-07-20
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Granted: 1979-01-09
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Expires: 1997-07-20
Abstract
Abstract A process for refinishing the surface of a body of a thermoplastic resin by subjecting the surface to treatment with a solvent. The surface is cooled, together with at least the material underlying the surface, to a temperature below the temperature at which the solvent can readily dissolve the resin. The surface of the body is then contacted with a solvent for a time sufficient to dissolve the surface but not to warm appreciably the inner layer of the body. The process avoids distortion in the refinished surface.
Inventors
- 👤 Manfred Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:33
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
In a process for refinishing the surface of a body of a thermoplastic resin selected from acrylonitrile-butadiene-styrene (ABS) and polystyrene by subjecting the surface to treatment with a solvent the improvement that comprises cleaning the body then cooling the surface and at least the material underlying the surface to a temperature in the range about -40° F. to about 40° F. then contacting the surface of the body with the solvent in vapor form for a time sufficient to dissolve the surface but not to warm appreciably the inner layer of the body.
Claim 2
Dependent Claim
93 words
In a process for refinishing the surface of a body of a thermoplastic resin selected from acrylonitrile-butadiene-styrene (ABS) and polystyrene by subjecting the surface to treatment with a solvent the improvement that comprises cleaning the body then cooling the surface and at least the material underlying the surface to a temperature in the range about -40° F. to about 40° F. then contacting the surface of the body with the solvent in vapor form for a time sufficient to dissolve the surface but not to warm appreciably the inner layer of the body.
Claim 3
Dependent Claim
14 words
A process as claimed in claim 1 in which the whole body is cooled.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1 in which the temperature is in the range about -20° F. to about 40° F.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 in which the solvent is methylene chloride alone or in a mixture with another halogenated hydrocarbon.
Claim 6
Dependent Claim
76 words
A process for refinishing the surface of a body of a thermoplastic resin selected from acrylonitrile-butadiene-styrene (ABS) and polystyrene that comprises subjecting the body to a preliminary degreasing and cleaning; removing scratches from the surface; cooling the surface of the body and at least the underlying layer to a temperature in the range about -40° F. to about 40° F.; drying the body; and subjecting the body to a treatment with the vapor of a solvent.
Claim 7
Dependent Claim
76 words
A process for refinishing the surface of a body of a thermoplastic resin selected from acrylonitrile-butadiene-styrene (ABS) and polystyrene that comprises subjecting the body to a preliminary degreasing and cleaning; removing scratches from the surface; cooling the surface of the body and at least the underlying layer to a temperature in the range about -40° F. to about 40° F.; drying the body; and subjecting the body to a treatment with the vapor of a solvent.
Claim 8
Dependent Claim
14 words
A process as claimed in claim 5 in which the whole body is cooled.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 5 in which the temperature is in the range about 20° F. to about 40° F.
Claim 10
Dependent Claim
19 words
A process as claimed in claim 5 in which the body of the thermoplastic resin is a telephone component.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |