Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2006-08-08
2006-08-08
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S570000, C524S341000, C074S60600R, C074S502000
Reexamination Certificate
active
07087674
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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Copending U.S. Appl. No. 10/365,239, filed Feb. 12, 2003.
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Calcut Brent D.
Chapaton Thomas J.
Jones Marie-Christine G.
Sarkar Reuben
Devries Chrsitopher
Sastri Satya
Wu David W.
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