Patent EP0157212A2 successfully refreshed from Google Patents.
EP0157212A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Articles coated with adherent diamondlike carbon films
Assignee: Wyeth Holdings LLC
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Filing: 1985-03-07
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Granted: —
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Expires: 2005-03-07
Abstract
Abstract Substrates, especially highly thermally expandable materials, such as plastics are adherently coated with a relatively soft layer comprising carbon and thereafter with a relatively harder layer of diamondlike carbon to provide coated articles that are abrasion resistant, electrically insulating, and resistant to chemical attack. If the substrate is transparent, the protectively coated article is transparent too.
Inventors
- 👤 Robert Domenico Giglia
- 👤 Richard Howard Clasen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 20:44
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/02; C23C16/0272; C08; C08J; C08J7/00; C08J7/04; C08J7/043; C08J7/046; C08J7/06; C23C14/00; C23C14/06; C23C14/0605; C23C16/22; C23C16/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/30; Y10T428/31504; Y10T428/31507; Y10T428/31678; Y10T428/31721; Y10T428/31725; Y10T428/31786; Y10T428/31855; Y10T428/31931; Y10T428/31938
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
40 words
An article comprising: (i) a solid substrate; (ii) an intermediate, relatively soft, layer adjacent at least one surface of said substrate, said layer comprising carbon; and (iii) adjacent said intermediate layer an outer, relatively hard, protective layer, comprising diamondlike carbon.
Claim 2
Dependent Claim
40 words
An article comprising: (i) a solid substrate; (ii) an intermediate, relatively soft, layer adjacent at least one surface of said substrate, said layer comprising carbon; and (iii) adjacent said intermediate layer an outer, relatively hard, protective layer, comprising diamondlike carbon.
Claim 3
Dependent Claim
33 words
An article as defined in Claim 1 wherein said intermediate layer (ii) comprises carbon and hydrogen, is approximately 100 to 5000 Angstroms in thickness and can be scratched by rubbing with steel wool.
Claim 4
Dependent Claim
32 words
An article as defined in Claim 1 wherein said outer, protective layer (iii) comprises carbon, is approximately 1000 to 20,000 Angstroms in thickness and cannot be scratched by rubbing with steel wool.
Claim 5
Dependent Claim
78 words
An article as defined in Claim 1, wherein said intermediate layer (ii) comprises carbon and hydrogen, is approximately 100 to 5000 Angstroms in thickness, and can be scratched by steel wool, and said outer protective layer (iii) comprises carbon and hydrogen, is approximately 1000 to 20,000 Angstroms in thickness, and which cannot be scratched by rubbing with steel wool, the amount of hydrogen relative to carbon being nil or substantially less in layer (iii) than in layer (ii).
Claim 6
Dependent Claim
15 words
An article as defined in Claim 1, wherein said substrate (i) is comprised of plastic.
Claim 7
Dependent Claim
35 words
An article as defined in Claim 5, wherein said plastic is a synthetic organic polymer selected from the group consisting of acrylics, polycarbonates, polyesters, polyamides, polyimides, styrene-acrylonitril E copolymers, styrene-acrylonitrile-butadiene terpolymers, and vinyl halide polymers.
Claim 8
Dependent Claim
14 words
An article as defined in Claim 6, wherein said synthetic organic polymer is transparent.
Claim 9
Dependent Claim
25 words
An article as defined in Claim 7, wherein said synthetic organic polymer is selected from the group consisting of poly(methyl methacrylate), polycarbonate, and polyvinyl chloride.
Claim 10
Dependent Claim
66 words
A protectively coated article comprising: (i) a solid substrate having a coefficient of thermal expansion substantially greater than diamondlike carbon; (ii) an intermediate layer of relatively soft carbon adjacent at least one surface of said substrate; and (iii) an outer, relatively hard, protective layer of diamondlike carbon adjacent said intermediate bonding layer, wherein said outer layer is adherently bonded to said substrate by said intermediate layer.
Claim 11
Dependent Claim
66 words
A protectively coated article comprising: (i) a solid substrate having a coefficient of thermal expansion substantially greater than diamondlike carbon; (ii) an intermediate layer of relatively soft carbon adjacent at least one surface of said substrate; and (iii) an outer, relatively hard, protective layer of diamondlike carbon adjacent said intermediate bonding layer, wherein said outer layer is adherently bonded to said substrate by said intermediate layer.
Claim 12
Dependent Claim
33 words
An article as defined in Claim 9 wherein said intermediate layer (ii) comprises carbon and hydrogen, is approximately 100 to 5000 Angstroms in thickness and can be scratched by rubbing with steel wool.
References Cited (Backward Citations)
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