Patents Represented by Attorney Ronald A. Bleeker

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  • Chelating agents for non-aqueous systems
    Patent number: 4387244
    Abstract: Alkyl-substituted hydroxy benzyl amino acid oligomers are effective metal chelating agents in a broad range of non-aqueous systems. The products claimed display surprisingly high solubilities in a broad range of substituted and unsubstituted aliphatic and aromatic solvents.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: June 7, 1983
    Assignee: W. R. Grace & Co.
    Inventors: Patricia M. Scanlon, E. Richard Young
  • Process for preparing chelating agents
    Patent number: 4338460
    Abstract: A process for preparing in high yield an isolable orthohydroxydiaminodicarboxylic acid which is useful as a metal chelating agent. The process comprises reacting a phenol (or mixture of phenols), a diaminodicarboxylic acid (or acid source), and a formaldehyde source in a medium having an acidic pH.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: July 6, 1982
    Assignee: W. R. Grace & Co.
    Inventors: Roger R. Gaudette, John L. Ohlson, Patricia M. Scanlon