Patents Assigned to Naoya Ogata
  • Organic nonlinear optical material
    Patent number: 5225577
    Abstract: An organic nonlinear optical material comprising a 4-nitrophenylaminoacetaldehyde acetal of the following formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom, or a linear or branched alkyl group having 1 to 6 carbon atoms, and R.sub.4 represents a hydrogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, a linear or branched alkoxy group having 1 to 6 carbon atoms, a hydroxyl group, a nitro group or a halogen atom.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: July 6, 1993
    Assignees: Naoya Ogata, Seizo Miyata, Ube Industries, Ltd., Research Development
    Inventors: Naoya Ogata, Yasuhiko Yokowo
  • Organic nonlinear optical material
    Patent number: 5112906
    Abstract: Disclosed are an organic nonlinear optical material comprising a 4-nitrophenylaminoacetaldehyde acetal represented by the following general formula: ##STR1## and a polymeric organic nonlinear optical material comprising an acetalized polyvinyl alcohol having the above-mentioned 4-nitrophenylaminoacetaldehyde acetal as the side chain.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: May 12, 1992
    Assignees: Naoya Ogata, Seizo Miyata, Ube Industries Ltd., Research Development Corporation of Japan
    Inventors: Naoya Ogata, Yasuhiko Yokowo