Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2007-06-16
2010-11-16
Blackwell, Gwendolyn (Department: 1784)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S704000, C428S698000, C428S699000, C428S323000
Reexamination Certificate
active
07833636
ABSTRACT:
The present invention relates to a piston ring for an internal combustion engine, the piston ring comprises a sulphide rich compound layer forming a surface layer, said sulphide rich compound layer comprising an iron nitride matrix with iron sulphide (FeS) inclusions embedded in said matrix, said sulphide rich compound layer having a sulphur content of 1 to 4 wt % S and a nitrogen content of 10 to 20 wt % N.
REFERENCES:
patent: 5187017 (1993-02-01), Hatano et al.
patent: 5316321 (1994-05-01), Ishida et al.
patent: 5985428 (1999-11-01), Chiba
patent: 6279913 (2001-08-01), Iwashita et al.
patent: 6726216 (2004-04-01), Horn et al.
patent: 6804944 (2004-10-01), Seiki et al.
patent: 0 152 945 (1981-12-01), None
patent: 55-011107 (1980-01-01), None
patent: 09-158873 (1997-06-01), None
patent: 10-217241 (1998-08-01), None
patent: 10-219423 (1998-08-01), None
patent: 2002-005017 (2002-01-01), None
International Search Report.
Daikoko et al., “Wear Property of Sulurizing and Nitriding Treatment,” Bulletin of the JSME, vol. 8, No. 31, 1965, pp. 475-491. XP-008087962 (ISR).
Ma et al., “Study on Friction and Wear Characteristics and Structure of Compound Layer from Combined Treatment of Ion . . . ,” Cailiao Rechuli Xuebao Bianjibu, vol. 25, No. 5, Pt. 2, 2004, pp. 649-652. XP-008087965 (ISR).
Araujo Juliano Avelar
Marques Gisela Ablas
Sarabanda Jose Valentim Lima
Blackwell Gwendolyn
Collard & Roe P.C.
MAHLE International GmbH
MAHLE Metal Leve, S.A.
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