Patents by Inventor Tatsuo Ogasa

Tatsuo Ogasa 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).

  • Porous composite material and process for preparing same
    Patent number: 4394457
    Abstract: A porous composite material includes a porous body formed of a hydrophobic polymer such as polyvinyl chloride and a layer of a hydrophilic polymer such as polyvinyl alcohol provided over at least a portion of the interior surface of each of the pores of the porous body. The composite material is obtained by a process including the steps of dispersing an aqueous solution containing a hydrophilic polymer and a foaming agent into a solution of a hydrophobic polymer in an organic solvent to form an emulsion, removing the water and the organic solvent from the emulsion to obtain a solid, and subjecting the solid to foaming conditions.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: July 19, 1983
    Assignee: Agency of Industrial Science & Technology
    Inventor: Tatsuo Ogasa
  • Process for preparing a porous composite material
    Patent number: 4252907
    Abstract: A porous composite material includes a porous body formed of a hydrophobic polymer such as polyvinyl chloride and a layer of a hydrophilic polymer such as polyvinyl alcohol provided over at least a portion of the interior surface of each of the pores of the porous body. The composite material is obtained by a process including the steps of dispersing an aqueous solution containing a hydrophilic polymer and a foaming agent into a solution of a hydrophobic polymer in an organic solvent to form an emulsion, removing the water and the organic solvent from the emulsion to obtain a solid, and subjecting the solid to foaming conditions.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: February 24, 1981
    Assignee: Director General of Agency of Industrial Science and Technology
    Inventor: Tatsuo Ogasa