Patents by Inventor Takao Itoh

Takao Itoh 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: 6586633
    Abstract: The present invention relates to amine derivatives represented by formula (1) or salts thereof. R3 represents C1-C3 alkyl, hydroxylated C1-C5 alkyl, C1-C5 acyl; C2-C5 alkenyl, or a halogen atom; and k, l, and m are each an integer of 1 to 4.) Exhibiting excellent antifungal effect, these compounds are highly useful as antifungal agents, antifungal compositions, drugs, etc.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: July 1, 2003
    Assignee: Pola Chemical Industries, Inc.
    Inventors: Masayuki Yuasa, Yukio Kawazu, Toshimitsu Suzuki, Toshiro Majima, Takao Itoh, Takuji Nakashima, Akira Nozawa, Hiroyuki Takimoto, Kouji Yokoyama
  • Patent number: 6329399
    Abstract: Novel amine derivatives having an excellent antimycotic effect represented by general formula (1) below and salts thereof are provided. [in the formula (1, R1 represents a C1-5 alkyl group which may be halogenated, R2 represents 4-(1,1-dimethylalkyl)benzyl group, 4-(1-methyl-phenylethyl)benzyl group, 1-or 2-naphthylmethyl group, or a hydrocarbon group having 3,3-dimethyl-1-butynyl group or a phenyl group at its terminal and 1 to 3 double bonds; R3 represents oxygen atom or a methylene group which may be substituted by a C1-4 alkyl group; and R4 represents 1-or 2 naphthyl group or a phenyl group which may be substituted.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: December 11, 2001
    Assignee: Pola Chemical Industries, Inc.
    Inventors: Takao Itoh, Takuji Nakashima, Akira Nozawa, Kouji Yokoyama, Hiroyuki Takimoto, Masayuki Yuasa, Yukio Kawazu, Toshimitsu Suzuki, Toshiro Majima
  • Patent number: 6136863
    Abstract: This invention relates to compounds represented by the following formula (1): ##STR1## wherein R.sup.1 represents a substituted or unsubstituted phenyl group, R.sup.2 represents a substituted or unsubstituted phenylene group, R.sup.3 represents a substituted or unsubstituted phenyl group or an aliphatic hydrocarbon group containing at least four .pi. electrons, R.sup.4 represents an alkyl group having 1 to 4 carbon atoms, and m and n individually represent integers of from 1 to 4, or salts thereof, and also to compositions containing the same. These compounds have antifungal activities and are useful as drugs.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: October 24, 2000
    Assignee: Pola Chemical Industries, Inc.
    Inventors: Yukio Kawazu, Masayuki Yuasa, Toshimitsu Suzuki, Takuji Nakashima, Takao Itoh, Toshiro Majima
  • Patent number: 5649908
    Abstract: In the catheter comprising: a balloon 11 provided with a front and a rear opening end and a thin wall made of synthetic resins; an outer tube 21; an inner tube 31 which is disposed inside the outer tube 21 and has its tip portion projected outward from the outer tube 21; and, the balloon 11 having the front and the rear opening end fixedly mounted in a water-tight manner on the inner tube 31 and the outer tube 21 to form a front fixed portion 61 and a rear fixed portion 61', respectively;a plurality of parallel-extending circumferential grooves 41 are provided to a distal area 32 of the inner tube 31, each of the circumferential grooves 41 having a predetermined length, and said distal area having a certain length which extends from said front fixed portion and over said rear fixed portion in a direction of the hub portion.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: July 22, 1997
    Assignee: Yugengaisha New-Wave Medical
    Inventor: Takao Itoh
  • Patent number: 5281734
    Abstract: The present invention relates to a novel polysilane composition and, more specifically, to a polysilane composition that is soluble in organic solvents, that has a molecular weight in the range of 2,000 to 1,000,000, and that has a short-wavelength (.ltoreq.285 nm) absorption maximum at room temperature.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: January 25, 1994
    Assignee: Dow Corning Japan, Ltd.
    Inventor: Takao Itoh
  • Patent number: 4188841
    Abstract: The apparatus is provided with a pair of opposed blades having sharp edges intersecting at an angle and blunt parallel edges contiguous to the sharp edges and spaced a minimum spacing which is larger than the diameter of the optical fiber clad but smaller than the outer diameter of the coating coated on the optical fiber. Accordingly when the coated optical fiber is urged between the blades, the coating is cut from the opposite sides of the blunt parallel edges except for a small thickness of the coating so that the coating can be readily removed without injuring the fiber clad. When the optical fiber is pulled outward from the apparatus, the coating portion to be removed is stripped without imparting any injury to the fiber clad.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: February 19, 1980
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Masaru Nakamura, Takao Itoh
  • Patent number: D269615
    Type: Grant
    Filed: April 21, 1981
    Date of Patent: July 5, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Nishiyama, Takao Itoh
  • Patent number: D281685
    Type: Grant
    Filed: August 5, 1983
    Date of Patent: December 10, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Eiji Takahashi, Mamoru Mori, Takao Itoh
  • Patent number: D286041
    Type: Grant
    Filed: February 28, 1984
    Date of Patent: October 7, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Hiraoka, Kazuhiko Nishiyama, Takao Itoh, Sadao Tani
  • Patent number: D289947
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: May 26, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Fumihito Katou, Kazuhiko Nishiyama, Kazuhiko Hiraoka, Takao Itoh, Sadao Tani
  • Patent number: D291689
    Type: Grant
    Filed: January 3, 1985
    Date of Patent: September 1, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Nishiyama, Takao Itoh
  • Patent number: D294691
    Type: Grant
    Filed: December 26, 1985
    Date of Patent: March 15, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Nobutoshi Yoshida, Takao Itoh