Patents by Inventor Keiji Ohno

Keiji Ohno 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).

  • Polymer-supported metal cluster composition
    Patent number: 8110519
    Abstract: The objective is to present compositions obtained by supporting by polymers micro clusters of transition metals and the like that are useful as catalysts in various reactions and, once used, are readily recovered and reused. A polymer-supported metal cluster composition is obtained by supporting a transition metal by a cross-linked polymer, and the polymer-supported cluster composition is characterized by the cross-linked polymer obtained by cross-linking of a cross-linkable polymer containing a hydrophilic side chain and a hydrophobic side chain group having a cross-linkable functional group. This polymer-supported metal cluster composition is, for example, preferably formed by first forming a micelle composed of the metal clusters supported by the cross-linkable polymer in a suitable solution and subsequently subjecting the cross-linkable polymer to a cross-linking reaction.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: February 7, 2012
    Assignees: Japan Science & Technology Agency, Wako Pure Chemical Industries, Ltd., Fuji Photo Film Co., Ltd.
    Inventors: Shu Kobayashi, Kuniaki Okamoto, Ryo Akiyama, Keiji Ohno, Yoshio Inagaki
  • Polymer-Supported Metal Cluster Composition
    Publication number: 20080058200
    Abstract: The objective is to present compositions obtained by supporting by polymers micro clusters of transition metals and the like that are useful as catalysts in various reactions and, once used, are readily recovered and reused. A polymer-supported metal cluster composition is obtained by supporting a transition metal by a cross-linked polymer, and the polymer-supported cluster composition is characterized by the cross-linked polymer obtained by cross-linking of a cross-linkable polymer containing a hydrophilic side chain and a hydrophobic side chain group having a cross-linkable functional group. This polymer-supported metal cluster composition is, for example, preferably formed by first forming a micelle composed of the metal clusters supported by the cross-linkable polymer in a suitable solution and subsequently subjecting the cross-linkable polymer to a cross-linking reaction.
    Type: Application
    Filed: March 7, 2005
    Publication date: March 6, 2008
    Inventors: Shu Kobayashi, Kuniaki Okamoto, Ryo Akiyama, Keiji Ohno, Yoshio Inagaki
  • Photosensitive compound
    Patent number: 5250669
    Abstract: Photosensitive compounds having preferably a functional group such as --SO.sub.2 Cl, --SO.sub.3 H, --SO.sub.3 R, ##STR1## (R, R', R" being alkyl) on a terminal benzene or naphthalene ring connected via a methylene group and ##STR2## moiety are improved in sensitivity to light and thermal stability, and thus useful in a photo resist.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: October 5, 1993
    Assignees: Wako Pure Chemical Industries, Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazufumi Ogawa, Masayuki Endo, Keiji Ohno, Mamoru Nagoya