Patents Represented by Attorney Ronald R. Fraser

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  • Asphalt and heavy oil degreaser
    Patent number: 6093689
    Abstract: An asphalt and heavy oil degreaser comprises a cyclic hydrocarbon solvent, dipropylene glycol mono n-butyl ether, a salt of an alkyl aromatic sulfonic acid, a branched alcohol ethoxylate, and an ethoxylated alkyl mercaptan.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: July 25, 2000
    Assignee: Dotolo Research Ltd.
    Inventor: Jack T. Vlasblom
  • Heavy oil remover
    Patent number: 5863881
    Abstract: A heavy oil remover comprises a cyclic hydrocarbon solvent, dipropylene glycol mono n-butyl ether, a volatility stabilizer, a salt of an alkyl aromatic sulfonic acid, a branched alcohol ethoxylate, an ethoxylated alkyl mercaptan, and water.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: January 26, 1999
    Assignee: Citra Science Ltd.
    Inventor: Jack T. Vlasblom