Patents by Inventor Takehiko Matsuzaki

Takehiko Matsuzaki 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).

  • Method for synthesizing aromatic polymers
    Patent number: 5576417
    Abstract: There is disclosed a method for producing aromatic polyamides represented by the following formula (III), which comprises reacting an aromatic dihalogen compound represented by the following formula (I) with a diamine compound represented by the following formula (II) in the presence of cobalt/phosphine complex and a basic substance under carbon monoxide atmosphere:X.sub.1 --Ar--X.sub.2 formula (I)wherein Ar represents an aromatic residue and X.sub.1 and X.sub.2 each represent a bromine or iodine atom,H.sub.2 N--R--NH.sub.2 formula (II)wherein R represents a divalent hydrocarbon group, andformula (III) ##STR1## wherein Ar and R each have the same meaning as the above, and n is a positive integer.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: November 19, 1996
    Assignee: Director-General of Agency of Industrial Science and Technology
    Inventors: Kazuhiko Takeuchi, Yoshihiro Kubota, Takaaki Hanaoka, Takehiko Matsuzaki, Yoshihiro Sugi, Tatsuya Eto, Tokio Hagiwara, Tadashi Narita
  • Process for the preparation of cyclooctene
    Patent number: 5233110
    Abstract: A process for the preparation of cyclooctene which comprises irradiating 1,5-cyclooctadiene with light in the presence of a photodehydrogenation catalyst, acetone and an alcohol to partially hydrogenate the 1,5-cyclooctadiene.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: August 3, 1993
    Assignee: Agency of Industrial Science & Technology
    Inventors: Taka-aki Hanaoka, Yoshihiro Sugi, Takehiko Matsuzaki, Kazuhiko Takeuchi, Hironori Arakawa
  • Process for the production of peracetic acid
    Patent number: 4024180
    Abstract: A process for the production of peracetic acid which comprises the steps of adding, to an inner solvent, acetaldehyde and at least one catalyst selected from the group consisting of strongly acidic carboxylic acids, strongly acidic phenols and nitric acid, and introducing oxygen gas or oxygencontaining gas into the resulting mixture while stirring the mixture and maintaining it at a temperature range of -5.degree. C to 50.degree. C.
    Type: Grant
    Filed: May 8, 1968
    Date of Patent: May 17, 1977
    Assignee: Agency of Industrial Science & Technology
    Inventors: Nobuto Ohta, Juichi Imamura, Takehiko Matsuzaki