Patents by Inventor Michio Yabuno

Michio Yabuno 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: 5868825
    Abstract: A magnetic recording medium comprising a magnetic layer, a backing layer, and a support sandwiched between the magnetic layer and the backing layer. The backing layer is made form a coating composition comprising a filler, binder, and a silicone compound represented by the following formula (I): ##STR1## wherein groups A, B, and D each independently represent --CH.sub.3 or a group -X-Y-Z, in which X represents a C1-C11 alkylene or --(CH.sub.2).sub.3 NHCO--, Y represents a specific aliphatic group, alicyclic group, or an aromatic group, and Z represents --OH, m is an integer from 4 to about 150, and n is an integer from 1 to 6,the compound of formula (I) containing at least one -X-Y-Z group, with the ratio of the number of groups -X-Y-Z to m being from 1:3 to 1:about 30.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: February 9, 1999
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Yoshio Hara, Michio Yabuno, Masami Kuwahara
  • Patent number: 5637405
    Abstract: A magnetic recording medium comprising a magnetic layer, a backing layer, and a support sandwiched between the magnetic layer and the backing layer. The backing layer is made form a coating composition comprising a filler, binder, and a silicone compound represented by the following formula (I): ##STR1## wherein groups A, B, and D each independently represent --CH.sub.3 or a group --X--Y--Z, in which X represents a C1-C11 alkylene or --(CH.sub.2).sub.3 NHCO--, Y represents a specific aliphatic group, alicyclic group, or an aromatic group, and Z represents --OH, m is an integer from 4 to about 150, and n is an integer from 1 to 6,the compound of formula (I) containing at least one --X--Y--Z group, with the ratio of the number of groups --X--Y--Z to m being from 1:3 to 1: about 30.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: June 10, 1997
    Assignee: Toyo Ink Manufacturing Co. Ltd.
    Inventors: Yoshio Hara, Michio Yabuno, Masami Kuwahara
  • Patent number: 5601914
    Abstract: A magnetic recording medium comprising a magnetic layer and a backing layer respectively on surfaces of a non-magnetic support which are opposite to each other, and a coating material for forming the backing layer. The backing layer is formed from the coating material containing a fatty acid salt having 5 to 11 carbon atoms with therefor a transition metal, a dispersant, a binder, and a filler. The backing layer provides improved properties, such as increased durability, smoothness of surface, electric conductivity, and light shielding.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: February 11, 1997
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Michio Yabuno, Yoshio Hara, Masami Kuwahara