US4554208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal bearing surface having an adherent score-resistant coating
Assignee: Motors Liquidation Co
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Filing: 1984-11-23
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Granted: 1985-11-19
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Expires: 2004-11-23
Abstract
Abstract A bearing element having an adherent score-resistant coating on its surface comprising a carbonized layer of an organic resin in which the layer is carbonized by ion implantation. The ion implantation is controlled to not only provide graphite-like and diamond-like structures in the carbonized coating but to also produce chemical bonding between carbon atoms of the resultant coating and atoms of the bearing surface.
Inventors
- 👤 Bernard A. MacIver
- 👤 James C. Erskine, Jr.
- 👤 John C. Bierlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:11
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/16; B29C37/00; B29C37/0078; C; C23; C23C; C23C26/00; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0872; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/26; Y10T428/30; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
An article of manufacture comprising a metal bearing surface, a sliding contact layer on the bearing surface that is less than about 1.0 micrometer thick and consists essentially of a sulfur-free organic resin that has been carbonized by ion implantation, which carbonized layer includes graphite-like and diamond-like crystalline microstructures, and a chemical bond between the carbonized layer and the metal bearing surface, that is attributable to chemical reactions induced by implanted ions targeted to provide maximum layer damage between the carbonized layer and the metal bearing surface, effective to provide an adherent, hard and score-resistant sliding contact coating on the metal bearing surface.
Claim 2
Dependent Claim
103 words
An article of manufacture comprising a metal bearing surface, a sliding contact layer on the bearing surface that is less than about 1.0 micrometer thick and consists essentially of a sulfur-free organic resin that has been carbonized by ion implantation, which carbonized layer includes graphite-like and diamond-like crystalline microstructures, and a chemical bond between the carbonized layer and the metal bearing surface, that is attributable to chemical reactions induced by implanted ions targeted to provide maximum layer damage between the carbonized layer and the metal bearing surface, effective to provide an adherent, hard and score-resistant sliding contact coating on the metal bearing surface.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |