Patents by Inventor Tatuaki Maeda

Tatuaki Maeda 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).

  • Patent number: 4810419
    Abstract: A shaped electroconductive aromatic imide polymer article comprising an aromatic imide polymer matrix and 10% to 40% by weight of short cut carbon fibers 1 to 30 .mu.m thick and 0.05 to 3.0 mm long dispersed in the matrix, is produced by admixing a slurry of the short cut carbon fibers having a limited moisture content of 1.0% or less in a polymerization medium, with a polymerization mixture containing an aromatic tetracarboxylic acid component and an aromatic diamine component, by subjecting the resultant admixture to a polymerization procedure to prepare a dope comprising a resultant polymerization product, the carbon fibers and the polymerization medium, and by subjecting the dope to shaped article-producing procedures in which the dope is shaped into a desired form and the shaped dope is solidified by removing the polymerization medium to provide a desired shaped article.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: March 7, 1989
    Assignee: Ube Industries Ltd.
    Inventors: Akihiro Kunimoto, Seiichirou Takabayashi, Morio Nakamura, Tatuaki Maeda