Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 20, 2007
Patent Application Number
10859429
Date Filed
June 2, 2004
Patent Primary Examiner
Patent abstract
Disclosed is a method of removing contaminants from a GM type cryogenic refrigerator that incorporates an oil lubricated compressor where such contaminants are introduced during servicing the refrigerator where at least some of the oil is replaced with clean oil.
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