Patents by Inventor Masaaki Koizawa

Masaaki Koizawa 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).

  • Process for stabilization of sodium percarbonate
    Patent number: 4325933
    Abstract: Sodium percarbonate can be stabilized by treatment with an aqueous solution of an alkaline earth metal salt to form a thin layer of an alkaline earth metal carbonate on the surface. The resulting sodium percarbonate is improved its respect to the nonhygroscopic property, while maintaining the same solubility in water and effective oxygen content as initially.
    Type: Grant
    Filed: June 11, 1980
    Date of Patent: April 20, 1982
    Assignee: Kao Soap Co., Ltd.
    Inventors: Tadao Matsumoto, Masaaki Koizawa