Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Thomas J. Chapaton0
Brent D. Calcut0
Marie-Christine G. Jones0
Reuben Sarkar0
Date of Patent
August 8, 2006
0Patent Application Number
103653580
Date Filed
February 12, 2003
0Patent Primary Examiner
Patent abstract
Antifoam compositions for functional fluids contain antifoam agents comprising perfluoropolyether compounds (PFPE). An automatic transmission fluid is provided containing the antifoam composition in a lubricating base oil, along with conventional additives such as antiwear agents. Automobile transmissions are provided that contain an automatic transmission fluid containing the new antifoam compositions. In a further embodiment, methods are provided for reducing foam in an engine oil or unwanted noise in an automobile transmission during operation, comprising lubricating the engine or transmission with a lubricating fluid containing the antifoam compositions of the invention.
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