Patents by Inventor Tatsuzo MUIRAKAWA

Tatsuzo MUIRAKAWA 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 LAYER CONSTITUENT AND PRODUCTION METHOD THEREFOR
    Publication number: 20220002583
    Abstract: The present invention relates to a porous layer structure containing a base material and a polyurethane porous layer formed on the base material, wherein a moisture permeability A of the porous layer structure measured by JIS L1099 A-1 (calcium chloride method) is 2000 to 10000 g/(m2ยท24h), a moisture permeability loss rate obtained by a predetermined formula from a moisture permeability B of the base material alone measured by JIS L1099 A-1 (calcium chloride method) and the moisture permeability A is 75% or less, and a peel strength at a bonding surface between the base material and the polyurethane porous layer is 0.7 kgf/inch or more.
    Type: Application
    Filed: November 7, 2019
    Publication date: January 6, 2022
    Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG CO., LTD.
    Inventors: Yusuke SUZUKI, Tatsuzo MUIRAKAWA, Kazuya SASAKI