Patents by Inventor Harumichi Kuwabara

Harumichi Kuwabara 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).

  • Calcium silicates, a production process thereof, and an inorganic antibacterial material using the same
    Patent number: 6403050
    Abstract: There is disclosed calcium silicates formed by reacting a silicic acid substance comprising an amorphous silicic acid gel obtained from clay minerals with a calcium compound. There also is disclosed a process for producing the same, and an inorganic antibacterial material using the same. The calcium silicates of the present invention have a high cationic exchange capacity and are excellent in the adsorbability of heavy metals. The inorganic antibacterial material according to the present invention can carry a sufficient amount of silver ions or silver complex ions and can be dispersed stably, for example, in a synthetic resin or the like. The production process according to the present invention can produce inorganic antibacterial material which are highly white and can be used suitably for various uses, and have sufficient antibacterial power.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: June 11, 2002
    Assignee: Kunimine Industries Co., Ltd.
    Inventors: Masahiro Maeno, Harumichi Kuwabara, Yasuhiko Kunimine