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Mukkamala Ravindranath: Thioimidazolidine derivatives as oil-soluble additives for lubricating oils. Rohm & Haas, August 7, 2002: EP1229023-A1 (1 worldwide citation)

A compound of formula I: wherein W represents O, S-A, or two groups, R and R; bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond; c is a single or double bond, and d is a single bond, double bond, or two single bonds, provided that ...


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Mukkamala Ravindranath: 4-thionoimidazolidine derivatives as oil-soluble additives for lubricating oils. Rohm & Haas, November 12, 2003: EP1361217-A1

Compounds having the formula wherein A and B are independently hydrogen, R, R, R and R are independently hydrogen, alkyl, alkenyl, aryl or aralkyl; or R and R, or R and R, combine with the carbon atom to which they are attached to form an alkyl or alkenyl ring; Y is O or S; Z is O, S or NR; m is 0 w ...


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Ravindranath Mukkamala: Oil-soluble additives for lubricating oils. Rohm And Haas Company, October 3, 2002: US20020142921-A1

A compound of formula I: 1 wherein W represents O, S—A2, or two groups, R3 and R4; bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond; c is a single or double bond, and d is a single bond, double bond, or two single bonds, provided ...