Patents by Inventor John A. Kydd

John A. Kydd 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).

  • Method of removal of boron from aqueous solutions
    Patent number: T995006
    Abstract: Boron is removed from aqueous solutions by heating the solution to 60.degree.-100.degree. C. and adding a calcium compound such as lime to form a precipitate of calcium borate which is separated such as by filtration. Improved results are obtained by using other calcium salts such as calcium chloride in combination with lime. For solutions initially containing less than 100 ppm boron, calcium borate seed crystals are introduced.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: June 3, 1980
    Assignee: United States Borax Chemical Corporation
    Inventors: John B. Farmer, John A. Kydd