Patents Represented by Attorney F. S. Valles

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  • Stabilized pigmented polyolefin compositions
    Patent number: 4066610
    Abstract: Polyolefins pigmented with copper phtalocyanine complexes are rendered stable against heat and oxidation by addition of a metal chelating agent.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: January 3, 1978
    Assignee: Dart Industries, Inc.
    Inventors: Kornel Dezso Kiss, John Leslie Hugh Allan, Marvin Michael Fein
  • Treatment of municipal waste sludges
    Patent number: 4028238
    Abstract: A highly concentrated municipal waste sludge is recovered in a process which involves adding alum and a flocculating agent under alkaline conditions to a dilute waste sludge, adding calcium oxide or hydroxide and filtering the resultant mixture under pressure.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: June 7, 1977
    Assignee: Dart Industries Inc.
    Inventor: John L. Allan