Patents by Inventor Sumiko Kishimoto

Sumiko Kishimoto 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).

  • 1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
    Patent number: 4477666
    Abstract: A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: ##STR1## and an acid addition salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: October 16, 1984
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Takako Hori, Chosaku Yoshida, Yasuo Kiba, Ryuko Takeno, Joji Nakano, Jun Nitta, Sumiko Kishimoto, Shohachi Murakami, Hisatsugu Tsuda, Isamu Saikawa
  • Novel 1-(4-piperidiniobenzyl)-2,3-dioxopiperazine derivatives or acid addition salts thereof
    Patent number: 4477664
    Abstract: A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: ##STR1## and an acid addition salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: October 16, 1984
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Takako Hori, Chosaku Yoshida, Yasuo Kiba, Ryuko Takeno, Joji Nakano, Jun Nitta, Sumiko Kishimoto, Shohachi Murakami, Hisatsugu Tsuda, Isamu Saikawa
  • 1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
    Patent number: 4460774
    Abstract: A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: ##STR1## and an acid addition salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: July 17, 1984
    Assignee: Toyama Chemical Company, Limited
    Inventors: Takako Hori, Chosaku Yoshida, Yasuo Kiba, Ryuko Takeno, Joji Nakano, Jun Nitta, Sumiko Kishimoto, Shohachi Murakami, Hisatsugu Tsuda, Isamu Saikawa
  • 1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives and salts thereof
    Patent number: 4459407
    Abstract: A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: ##STR1## and a salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: July 10, 1984
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Takako Hori, Chosaku Yoshida, Yasuo Kiba, Ryuko Takeno, Joji Nakano, Jun Nitta, Sumiko Kishimoto, Shohachi Murakami, Hisatsugu Tsuda, Isamu Saikawa
  • 4-[4-(Thiazolyl-amino)benzyl]-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
    Patent number: 4448963
    Abstract: A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: ##STR1## and an acid addition salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: May 15, 1984
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Takako Hori, Chosaku Yoshida, Yasuo Kiba, Ryuko Takeno, Joji Nakano, Jun Nitta, Sumiko Kishimoto, Shohachi Murakami, Hisatsugu Tsuda, Isamu Saikawa
  • 1-(4-Aminobenzyl)-2,3-dioxopiperazine derivatives, acid addition salts thereof and process for producing same
    Patent number: 4436921
    Abstract: A 1-(4-aminobenzyl)-2,3-dioxopiperazine derivative represented by the formula: ##STR1## and an acid addition salt thereof have excellent carcinostatic activity but a low toxicity. Therefore, said compounds are useful as medicines and also as intermediates.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: March 13, 1984
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Takako Hori, Chosaku Yoshida, Yasuo Kiba, Ryuko Takeno, Joji Nakano, Jun Nitta, Sumiko Kishimoto, Shohachi Murakami, Hisatsugu Tsuda, Isamu Saikawa