Marshall, O'Toole, Gerstein, Murray & Bicknell
Method of forming oxide film on stainless steel
 This disclosure relates to a method of forming a tinted oxide film on the surface of austenite stainless steel. The method comprises electropolishing the surface, oxidizing the surface at a temperature to form the oxide film and then cleaning the film with a weak acid. 
Shinko Pantec Co., Ltd.
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Masao Akihiko Kenichi Tadahiro
Saito Hogetsu Ushikoshi Ohmi