US5368939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard multilayer coated product and process for producing same
Assignee: YKK Corp
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Filing: 1993-07-06
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Granted: 1994-11-29
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Expires: 2013-07-06
Abstract
Abstract This present invention provides a hard multilayer coated product comprising a hard wear-resistant titanium compound coating layer, a titanium compound layer having a compositional gradient and a self-lubricating coating layer comprising hard amorphous carbon as the principal component successively formed on the surface of a substrate, the first layer being formed at about 500° C. by the plasma CVD method in a vacuum followed by the formation of the second and third layers at 250° to 400° C. in a vacuum maintained at the same level as above. The hard multilayer coated product is improved in wear-resistance and self-lubricity.
Inventors
- 👤 Shingo Kawamura
- 👤 Minoru Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:20
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32; C23C16/34; C23C28/00; C23C28/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A hard multilayer coated product which comprises a first coating layer of a titanium compound, a second layer containing the titanium compound, the content of the titanium compound in the second layer gradually decreasing away from the first coating layer, and a third coating layer, said third coating layer comprising hard amorphous carbon as a principal component, 5-40 mol % of the titanium compound and up to 3 at. % of chlorine, said first, second and third layers being formed successively on the surface of a substrate and said titanium compound being selected from the group consisting of TiC and TiN.
Claim 2
Dependent Claim
101 words
A hard multilayer coated product which comprises a first coating layer of a titanium compound, a second layer containing the titanium compound, the content of the titanium compound in the second layer gradually decreasing away from the first coating layer, and a third coating layer, said third coating layer comprising hard amorphous carbon as a principal component, 5-40 mol % of the titanium compound and up to 3 at. % of chlorine, said first, second and third layers being formed successively on the surface of a substrate and said titanium compound being selected from the group consisting of TiC and TiN.
Claim 3
Dependent Claim
18 words
A product according to claim 1, wherein each of said layers is formed by the plasma CVD method.
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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) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |