Metal treatment – Stock – Ferrous
Reexamination Certificate
2006-07-25
2006-07-25
Yee, Deborah (Department: 1742)
Metal treatment
Stock
Ferrous
C420S013000, C420S025000, C420S032000, C420S033000, C075S567000, C075S560000
Reexamination Certificate
active
07081172
ABSTRACT:
A nodular graphite cast iron is provided, having a pearlite matrix, with high strength and high toughness. The nodular graphite cast iron consists essentially of, by weight %: from 3.0 to 4.6% of carbon; from 1.6 to 2.5% of silicon; from 0.2 to 0.6% of manganese; from 0.02 to 0.05% of magnesium; from 0.0004 to 0.090% of zirconium; at least one of tin and copper such that α ranges from 0.01 to 0.06% where α indicates a tin conversion amount defined by a summation of a weight % of the tin and 0.1× a weight % of the copper; and the balance of iron and inevitable foreign matters.
REFERENCES:
patent: 4435226 (1984-03-01), Neuhauser et al.
patent: 5551995 (1996-09-01), Nagayoshi
patent: 6746550 (2004-06-01), Hollinger
patent: 49-21320 (1974-02-01), None
patent: 49021320 (1974-02-01), None
patent: 60-36755 (1985-02-01), None
patent: 361143554 (1986-07-01), None
patent: 63-483 (1988-01-01), None
patent: 10-237528 (1998-09-01), None
patent: 2001-073063 (2001-03-01), None
patent: 1186684 (1985-10-01), None
English abstract of Russian patent 1186684A published Oct. 23, 1985.
Coderre Francois
Enya Yasuhiro
Ibayashi Yoshikazu
Matukura Masaru
Aisin Seiki Kabushiki Kaisha
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Yee Deborah
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