C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
38/23, 148/44
C21D 1/76 (2006.01) C21D 1/53 (2006.01) C23C 8/06 (2006.01)
Patent
CA 1258609
SHALLOW CASE HARDENING PROCESS Abstract of Disclosure A shallow case hardening process comprising passing selected mixtures of gases for proscribed times through sand in which workpieces are imbedded at temperatures substantially different from recommended levels in normal nitriding.
489938
Ashland Oil Inc.
Gowling Lafleur Henderson Llp
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