Patents by Inventor Yoshiko Seo

Yoshiko Seo 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).

  • 3-cephem derivative crystal
    Patent number: 6887992
    Abstract: A 3-cephem derivative crystal which is a clathrate compound comprising p-methoxybenzyl ester of 7-phenylacetamide-3-formyl-3-cephem-4-carboxylic acid and dimethylformamide and a process for preparing the 3-cephem derivative crystal.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: May 3, 2005
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Takashi Moriyoshi, Yasuhiro Uosaki, Yutaka Kameyama, Daisuke Suzuki, Yoshiko Seo
  • 3-cephem derivative crystal
    Publication number: 20040073023
    Abstract: A 3-cephem derivative crystal which is a clathrate compound comprising p-methoxybenzyl ester of 7-phenylacetamide-3-formyl-3-cephem-4-carboxylic acid and dimethylformamide and a process for preparing the 3-cephem derivative crystal.
    Type: Application
    Filed: October 7, 2003
    Publication date: April 15, 2004
    Inventors: Takashi Moriyoshi, Yasuhiro Uosaki, Yutaka Kameyama, Daisuke Suzuki, Yoshiko Seo
  • Process for preparation of polyhydric alcohols
    Patent number: 6656328
    Abstract: A process for preparing a polyhydric alcohol according to the invention comprises subjecting a polyhydric alcohol compound having protected hydroxy group(s) to microwave irradiation in the presence of basic compound(s) or acid(s) having an acid dissociation exponent (pKa) of −8 to 3 at 25° C. to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The invention can provide an industrially advantageous process for preparing polyhydric alcohols by readily removing protecting group(s) from protected hydroxy group(s) of polyhydric alcohol compounds.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: December 2, 2003
    Assignees: National Institute of Advanced Industrial Science and Technology, Otsuka Chemical Co., Ltd.
    Inventors: Syunsaku Kato, Daisuke Suzuki, Yoshiko Seo
  • Process for preparation of polyhydric alcohols
    Publication number: 20020157939
    Abstract: A process for preparing a polyhydric alcohol according to the invention comprises subjecting a polyhydric alcohol compound having protected hydroxy group(s) to microwave irradiation in the presence of basic compound(s) or acid(s) having an acid dissociation exponent (pKa) of −8 to 3 at 25° C. to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The invention can provide an industrially advantageous process for preparing polyhydric alcohols by readily removing protecting group(s) from protected hydroxy group(s) of polyhydric alcohol compounds.
    Type: Application
    Filed: March 5, 2002
    Publication date: October 31, 2002
    Inventors: Syunsaku Kato, Daisuke Suzuki, Yoshiko Seo