Patents by Inventor John H. Cosgrove

John H. Cosgrove has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Treatment of zinc hydroxide slurry and recovery of zinc-containing product therefrom
    Patent number: 3985858
    Abstract: A dilute aqueous slurry of hydrated zinc oxide is subjected to heat and pressure to obtain solids having improved filtering characteristics. The process is especially useful in the treatment of neutralized waste liquor from the viscose rayon system to provide a more economical method for the recovery of zinc sulfate.
    Type: Grant
    Filed: April 8, 1975
    Date of Patent: October 12, 1976
    Assignee: FMC Corporation
    Inventor: John H. Cosgrove