Patents by Inventor Natsuko Okano

Natsuko Okano 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).

  • Insecticidal/acaricidal agents
    Patent number: 6548511
    Abstract: This invention provides an insecticidal and acaricidal agent which can control various insanitary insects and insects, mites and eggs thereof which are harmful to the agricultural and horticultural products, at a low chemical concentration. The insecticidal and acaricidal agent of this invention contains an anilinopyrimidinone derivative represented by the following general formula (I) as an active ingredient.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: April 15, 2003
    Assignees: Sagami Chemical Research Center, Mitsubishi Chemical Corporation
    Inventors: Kenji Hirai, Takeshi Yoshizawa, Sachiko Itoh, Natsuko Okano, Yuriko Nagata, Chikako Ota, Toshiki Fukuchi, Keiko Yoshiya
  • Process for the preparation of 3-(substituted phenyl)-5-alkylidene-1,3-oxazolidine-2,4-dione derivatives
    Patent number: 6090946
    Abstract: The present invention provides an industrial process for efficiently preparing a 3-(substituted phenyl)-5-isopropylidene-1,3-oxazolidine-2,4-dione derivative having a potent herbicidal activity without using phosgene or the like. The present invention relates to a process for preparing a 3-(substituted phenyl)-5-alkylidene-1,3-oxazolidine-2,4-dione derivative represented by general formula (III), which comprises reaction of an N-(substituted phenyl)carbamate represented by general formula (I) with a 2-hydroxy-3-alkenoate represented by-general formula (II) or with a 3-alkoxy-2-hydroxyalkanoate represented by general formula (IV): ##STR1## (wherein Ar is a substituted phenyl group, R.sup.1 is an alkyl group having a carbon number of from 1 to 6, R.sup.2 and R.sup.3 are independently hydrogen atoms or alkyl groups having carbon numbers of from 1 to 12, and R.sup.4 and R.sup.5 are independently alkyl groups having carbon numbers of from 1 to 6).
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: July 18, 2000
    Assignees: Sagami Chemical Research Center, Kaken Pharmaceutical Co., Ltd
    Inventors: Kenji Hirai, Katsuyuki Masuda, Tomoyuki Yano, Ryuta Ohno, Tomoko Matsukawa, Kiyomi Imai, Natsuko Okano, Tomoko Yoshii, Takehito Mouri
  • Hydantoin derivatives and herbicides containing said derivatives as active ingredient
    Patent number: 5883049
    Abstract: This invention provides with novel hydantoin derivatives, processes for preparing them, and herbicides containing said derivatives as active ingredient.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: March 16, 1999
    Assignees: Sagami Chemical Research Center, Kaken Pharmaceutical Co., Ltd.
    Inventors: Kenji Hirai, Tomoyuki Yano, Natsuko Okano, Sadayuki Ugai, Osamu Yamada