Patents by Inventor Yohei Itoi

Yohei Itoi 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).

  • Publication number: 20210405603
    Abstract: Provided is an apparatus for generating a operation plan of a hydrogen production system comprising a hydrogen production apparatus, comprising: a demand predicting unit for generating a predicted demand amount for each of a plurality of types of hydrogen with a different environmental load of production over a target period of the operation plan; and an operation planning unit for generating the operation plan, which is for generating a plurality of types of hydrogen with a different environmental load of production by the hydrogen production apparatus, based on a predicted hydrogen demand amount of each of the plurality of types of hydrogen.
    Type: Application
    Filed: September 8, 2021
    Publication date: December 30, 2021
    Inventors: Goshu NAGINO, Hiroshi KAKIHIRA, Yohei ITOI
  • Patent number: 6758253
    Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a radial carcass extending between a pair of bead cores and having a turnup portion, a bead filler rubber, and one or more reinforcing cord layers arranged at a side face zone ranging from the bead portion to the sidewall portion, in which the reinforcing cord layer is a layer of one or more rubberized cords spirally wound about an axial line of the tire and has an inner end in a radial direction of the tire between a position located outward from an outer periphery of the bead core in the radial direction and a position located inward from a tapered end of the bead filler rubber in the radial direction.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: July 6, 2004
    Assignee: Bridgestone Corporation
    Inventor: Yohei Itoi
  • Publication number: 20010010246
    Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a radial carcass extending between a pair of bead cores and having a turnup portion, a bead filler rubber, and one or more reinforcing cord layers arranged at a side face zone ranging from the bead portion to the sidewall portion, in which the reinforcing cord layer is a layer of one or more rubberized cords spirally wound about an axial line of the tire and has an inner end in a radial direction of the tire between a position located outward from an outer periphery of the bead core in the radial direction and a position located inward from a tapered end of the bead filler rubber in the radial direction.
    Type: Application
    Filed: January 10, 2001
    Publication date: August 2, 2001
    Inventor: Yohei Itoi
  • Patent number: 6248848
    Abstract: A 2′-diarylphosphino-1,1′-biphenylen-2-yloxy(6,6′-divinyl-1,1′-binaphthalene-2,2′-diyloxy)phosphine derivative is disclosed, which is represented by general formula (I): wherein Ar is an optionally substituted phenyl or naphthyl; R1 and R2 each independently is a hydrogen atom, a lower alkyl, a lower alkoxy, etc.; and R3 is a lower alkyl, a lower alkoxy, etc.; provided that R2 and R3 may be bonded to each other to form a hydrocarbon ring, which may have one or more substituents selected from lower alkyl groups, halogen atoms, vinyl, etc. Also disclosed are a polymer having structural units derived from the phosphine derivative and a transition metal complex obtained by causing a transition metal compound to act on the phosphine derivative.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: June 19, 2001
    Assignee: Takasago International Corporation
    Inventors: Kyoko Tamao, Yohei Itoi
  • Patent number: 6143834
    Abstract: A transition metal complex of a polymer of 2'-diarylphosphino-1,1'-biphenylen-2-yloxy(6,6'-divinyl-1,1'-binaphthalene -2,2'-diyloxy)phosphine derivative is disclosed, which is represented by general formula (I): ##STR1## wherein Ar is an optionally substituted phenyl or naphthyl; R.sup.1 and R.sup.2 each independently is a hydrogen atom, a lower alkyl, a lower alkoxy, etc.; and R.sup.3 is a lower alkyl, a lower alkoxy, etc.; provided that R.sup.2 and R.sup.3 may be bonded to each other to form a hydrocarbon ring, which may have one or more substituents selected from lower alkyl groups, halogen atoms, vinyl, etc. Also disclosed are a polymer having structural units derived from the phosphine derivative and a transition metal complex obtained by causing a transition metal compound to act on the phosphine derivative or the polymer. A novel polymer-supported ligand is provided which, when used as a catalyst for asymmetric syntheses, gives satisfactory results concerning catalytic activity, enantiomer excess, etc.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: November 7, 2000
    Assignee: Takasago International Corporation
    Inventors: Kyoko Tamao, Yohei Itoi
  • Patent number: 6022936
    Abstract: A 6-vinyl-2'-diarylphosphino-1,1'-binaphthalen-2-yloxy(biphenylene-2,2'-diyl oxy)phosphine derivative is disclosed, which is represented by general formula (I): ##STR1## wherein Ar is an optionally substituted phenyl or naphthyl; R.sup.1 and R.sup.2 each independently is a hydrogen atom, a lower alkyl, a lower alkoxy, etc.; and R.sup.3 is a lower alkyl, a lower alkoxy, etc.; provided that R.sup.2 and R.sup.3 may be bonded to each other to form a hydrocarbon ring, which may have one or more substituents selected from lower alkyl groups, halogen atoms, vinyl, etc. Also disclosed are a polymer having structural units derived from the phosphine derivative and a transition metal complex obtained by causing a transition metal compound to act on the phosphine derivative or the polymer. A novel polymer-supported ligand is provided which, when used as a catalyst for asymmetric syntheses, gives satisfactory results concerning catalytic activity, enantiomer excess, etc.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: February 8, 2000
    Assignee: Takasago International Corporation
    Inventors: Kyoko Tamao, Yohei Itoi