Patents Represented by Attorney B. W. Brennan

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  • 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