Patents by Inventor Akiho Nagata

Akiho Nagata 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).

  • Preparation of microcapsules
    Patent number: 3943063
    Abstract: Microcapsules are made by (a.) dispersing or dissolving a core substance in a film-forming polymer solution, (b.) emulsifying in fine droplets the resulting dispersion or solution in a vehicle which is poorly miscible with the solvent of the polymer solution and which doesn't dissolve said polymer to prepare an emulsion, and (c.) adding to the emulsion a non-solvent for the polymer wherein the non-solvent is miscible with the solvent, poorly miscible with the vehicle, and does not dissolve the polymer, whereby the solvent is removed by being absorbed by non-solvent emulsion droplets to precipitate the polymer film around the core substance.
    Type: Grant
    Filed: January 2, 1973
    Date of Patent: March 9, 1976
    Assignee: Toyo Jozo Company, Ltd.
    Inventors: Masataka Morishita, Yoshihito Inaba, Mitsuru Fukushima, Sadami Kobari, Akiho Nagata, Jinnosuke Abe