Patent US4353965A successfully refreshed from Google Patents.
US4353965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant silicone coated polycarbonate article having an acrylic primer layer containing a U.V. absorbing compound
Assignee: General Electric Co
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Filing: 1979-12-21
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Granted: 1982-10-12
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Expires: 1999-12-21
Abstract
Abstract A shaped, non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having disposed on the surface thereof a non-opaque primer layer comprised of from about 25 to about 85 weight percent of a thermoset acrylic polymer and from about 15 to about 75 weight percent of at least one ultraviolet light absorbing compound, and disposed on said primer layer a non-opaque top coat comprised of a thermoset organopolysiloxane.
Inventors
- 👤 Daniel R. Olson
- 👤 John C. Goossens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:46
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/046; C08J2369/00; C08J2433/00; C08J2433/04; C08J2433/06; C08J2433/08; C08J2483/00; C08J2483/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
In an improved coated poycarbonate article having abrasion and chemical solvent resistance and exhibiting improved adhesion and weatherability of the coating to the polycarbonate substrate comprising a polycarbonate substrate having adhered thereto on at least one surface thereof (i) an adhesion promoting thermoset acrylic primer layer; and (ii) a top coat adherently disposed on said primer layer comprised of a thermoset organopolysiloxane; the improvement consisting of said primer layer consisting essentially of from about 25 to about 85 weight percent of at least one thermoset acrylic polymer and from about 15 to about 75 weight percent of at least one ultraviolet light screening compound.
Claim 2
Dependent Claim
104 words
In an improved coated poycarbonate article having abrasion and chemical solvent resistance and exhibiting improved adhesion and weatherability of the coating to the polycarbonate substrate comprising a polycarbonate substrate having adhered thereto on at least one surface thereof (i) an adhesion promoting thermoset acrylic primer layer; and (ii) a top coat adherently disposed on said primer layer comprised of a thermoset organopolysiloxane; the improvement consisting of said primer layer consisting essentially of from about 25 to about 85 weight percent of at least one thermoset acrylic polymer and from about 15 to about 75 weight percent of at least one ultraviolet light screening compound.
Claim 3
Dependent Claim
40 words
The article of claim 1 wherein said primer layer contains from about 25 to about 80 weight percent of a thermoset acrylic polymer and from about 20 to about 75 weight percent of at least one ultraviolet light screening compound.
Claim 4
Dependent Claim
40 words
The article of claim 2 wherein said primer layer contains from about 25 to about 75 weight percent of a thermoset acrylic polymer and from about 25 to about 75 weight percent of at least one ultraviolet light screening compound.
Claim 5
Dependent Claim
40 words
The article of claim 3 wherein said primer layer contains from about 25 to about 70 weight percent of a thermoset acrylic polymer and from about 30 to about 75 weight percent of at least one ultraviolet light screening compound.
Claim 6
Dependent Claim
19 words
The article of claim 4 wherein said thermoset organopolysiloxane is the hydrolysis and condensation product of an alkyl trialkoxysilane.
Claim 7
Dependent Claim
13 words
The article of claim 5 wherein said alkyl trialkoxysilane is an alkyl triethoxysilane.
Claim 8
Dependent Claim
12 words
The article of claim 6 wherein said trialkoxysilane is a methyl trialkoxysilane.
Claim 9
Dependent Claim
12 words
The article of claim 7 wherein said methyl trialkoxysilane is methyl triethoxysilane.
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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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |