Patents by Inventor Tetsuro Shimazaki

Tetsuro Shimazaki 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 producing microcapsules
    Patent number: 4337169
    Abstract: In the process for microencapsulating a hydrophobic color forming substance from an aqueous emulsion thereof with membrane forming materials including an aromatic hydroxy compound, urea and formaldehyde, when the polymerization of the components, is carried out in the presence of an amino acid the resulting microcapsules give a self-contained pressure sensitive recording paper having almost no stain.
    Type: Grant
    Filed: May 22, 1980
    Date of Patent: June 29, 1982
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventor: Tetsuro Shimazaki
  • Process for coating dispersed minute droplets with membrane
    Patent number: 4303548
    Abstract: Microcapsules containing water-insoluble liquid, of which wall membrane is urea-formaldehyde resin is produced by the addition of a water soluble organic acid, urea and formaldehyde to an emulsion of the liquid, which is made by a nonionic emulsifier and heating the emulsion to effect the polycondensation of urea and formaldehyde.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: December 1, 1981
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Tetsuro Shimazaki, Shun Kamei