Patents by Inventor Shoko Oyanagi

Shoko Oyanagi 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: 6359093
    Abstract: An amphipathic compound represented by any of the following Formulas: (R1 is a linear or branched, saturated hydrocarbon group having 6 to 48 carbon atoms, or a linear or branched, unsaturated hydrocarbon group containing 1 to 12 unsaturated double bond and having 6 to 48 carbon atoms; Y is NH, N—(CH2—CH═CH2), or O; Q is —CH2—C(R2)═CH2 or —R4—O—CO—C(R2)═CH2; and M is alkali metal, an ammonium group, or —(CH2CH2O)mH), a copolymer of the amphipatic compound with a copolymerizable ethylenically unsaturated compound and, a paper making additive containing a water soluble or dispersible high molecular compound as an active ingredient and processes for producing these high molecular compounds.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: March 19, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Toshihiko Takaki, Masaru Tanabe, Shoko Oyanagi
  • Patent number: 6057412
    Abstract: An amphipathic compound represented by any of the following Formulas: ##STR1## (R.sub.1 is a linear or branched, saturated hydrocarbon group having 6 to 48 carbon atoms, or a linear or branched, unsaturated hydrocarbon group containing 1 to 12 unsaturated double bond and having 6 to 48 carbon atoms; Y is NH, N--(CH.sub.2 --CH.dbd.CH.sub.2), or O; Q is --CH.sub.2 --C(R.sub.2).dbd.CH.sub.2 or --R.sub.4 --O--CO--C(R.sub.2).dbd.CH.sub.2 ; and M is alkali metal, an ammonium group, or --(CH.sub.2 CH.sub.2 O).sub.m H), a copolymer of the amphipatic compound with a copolymerizable ethylenically unsaturated compound and, a paper making additive containing a water soluble or dispersible high molecular compound as an active ingredient and processes for producing these high molecular compounds.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: May 2, 2000
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Toshihiko Takaki, Masaru Tanabe, Hiroshi Itoh, Masayuki Yanagi, Shoko Oyanagi, Hiroyoshi Watanabe
  • Patent number: 5872287
    Abstract: Provided are an amphipathic compound represented by any of the following Formulas: ##STR1## (R.sub.1 is a linear or branched, saturated hydrocarbon group having 6 to 48 carbon atoms, or a linear or branched, unsaturated hydrocarbon group containing 1 to 12 unsaturated double bond and having 6 to 48 carbon atoms; Y is NH, N--(CH.sub.2 --CH.dbd.CH.sub.2), or O; Q is --CH.sub.2 --C(R.sub.2).dbd.CH.sub.2 or --R.sub.4 --O--CO--C(R.sub.2).dbd.CH.sub.2 ; and M is alkali metal, an ammonium group, or --(CH.sub.2 CH.sub.2 O).sub.m H), a copolymer of the amphipatic compound with a copolymerizable ethylenically unsaturated compound and, a paper making additive containing a water soluble or dispersible high molecular compound as an active ingredient and processes for producing these high molecular compounds.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: February 16, 1999
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Toshihiko Takaki, Masaru Tanabe, Hiroshi Itoh, Masayuki Yanagi, Shoko Oyanagi, Hiroyoshi Watanabe, Atsushi Utsunomiya, Yasuko Ono, Masanori Tsuchihashi
  • Patent number: 5668229
    Abstract: A process for preparing an acrylamide polymer is herein disclosed which comprises the step of initiating polymerization in the presence of an oxidation-reduction system polymerization initiator comprising two or more kinds of oxidizing agents and a reducing agent. According to this process, the polymerization rate can be remarkably increased without bringing about a decrease in the molecular weight of the polymer, and hence, restriction on manufacturing facilities and apparatuses can be relieved and productivity can be remarkably enhanced, which permits a decrease in manufacturing cost.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: September 16, 1997
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Takashi Abe, Hiroshi Itoh, Manabu Tsuruta, Shoko Oyanagi, Kenichi Nakamura