The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2002
Filed:
Oct. 21, 1999
Dave Narasimhan, Flemingtonn, NJ (US);
Alexander S. Kozlov, Wharton, NJ (US);
Steve H. Halfmann, Chandler, AZ (US);
Mark C. Morris, Phoenix, AZ (US);
Thomas E. Strangman, Phoenix, AZ (US);
Allied Signal, Inc., Morris Township, NJ (US);
Abstract
A method for making a bimetallic ring seal having a nickel core covered by a first layer of platinum having a inner dense portion and a second outer portion both of which plastically deform in the presence of a load. The method includes the step of applying a porous layer of platinum over the dense layer by electroless plating in a platinum bath comprising 0.8-1.2 gram/liter platinum as diammine dinitrite salt Pt(NH ) (NO ) , 50-100 milliliter/liter of 25% ammonium hydroxide NH OH; and 0.3-1.5 gram/liter hydrazine hydrate N H —H O, at a temperature in the range of 75-90° C. and at a plating rate in the range of 0.5-3.0 micron/hour and then plastically deforming the ring seal under load.