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:
Feb. 24, 1998
Filed:
Aug. 01, 1996
David Bronson, Manhattan Beach, CA (US);
Don K Fulkerson, Valencia, CA (US);
Richard E Smith, Bakersfield, CA (US);
Hughes Electronics, Los Angeles, CA (US);
Abstract
A method is provided for removing metal oxide debris from various types of surfaces, both metallic and nonmetallic. Specifically, the surface to be cleaned is treated (preferably by immersion) with a preheated solution of 65 to 71 wt % (55.3 to 62.0 vol %) nitric acid, which is roughly equivalent to reagent grade nitric acid. The temperature of the solution is within the range of about 160.degree. to 175.degree. F. (71.degree. to 79.degree. C.). The preheated solution dissolves any metal oxide debris present on the surface, which may then be rinsed away following treatment. The method effects the removal of metal oxide residue from surfaces without further degrading the surfaces being cleaned. Further, the method is capable of cleaning internal surfaces of components without requiring disassembly of sealed or welded components, since all that is needed to effect cleaning is contact between the surface to be cleaned and the preheated solution. Finally, the method is easily implemented since it involves only the simple steps of contacting the component with a single preheated component that is widely available, namely reagent grade nitric acid, followed by rinsing and drying.