Patents by Inventor Seigo Iwagami

Seigo Iwagami 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 the production of highly water-absorbing but less water-soluble hydrogels
    Patent number: 4351922
    Abstract: A highly water-absorbing but less water-soluble hydrogel is produced by polymerizing at least one hydrophilic ethylenically unsaturated monomer, e.g., ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, or derivatives thereof, in the presence of a specific difunctional compound, e.g., polyethyleneglycol diglycidyl ether, polyethyleneglycol diacrylate, etc.
    Type: Grant
    Filed: August 19, 1980
    Date of Patent: September 28, 1982
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Tooru Yoshida, Seigo Iwagami, Takashi Ueshima, Yoshikazu Hosoda