Patents by Inventor Hisafumi Ikeda

Hisafumi Ikeda 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: 20220177966
    Abstract: An object of the present invention is to provide a means for detecting or quantitatively determining short-chain nucleic acids by simple double-strand formation with high specificity. The present invention relates to a polynucleobase probe including, in a sequence complementary to a target sequence having at least one sequence of any one of SEQ ID NOs: 1 to 10, a sequence in which at least one of bases in a portion complementary to any one sequence of SEQ ID NOs: 1 to 10 in the target sequence becomes abasic and/or is substituted; a method for designing the same; and a method for utilizing the same.
    Type: Application
    Filed: February 4, 2022
    Publication date: June 9, 2022
    Applicant: YOKOWO CO., LTD.
    Inventors: Yui NIIJIMA, Shintaro TAKASE, Hisashi SUZUKI, Hisafumi IKEDA
  • Publication number: 20210396704
    Abstract: A method for treating a solution including nucleic acid, comprising the steps of: arranging the solution on a first surface of a first base material having the first surface, which has a well defined by an electrode and a resist; and after arranging the solution on the first surface of the first base material, pressing the first base material and a second base material, which has a hydrophobic second surface, together so that the second surface of the second base material and the first surface of the first base material face each other.
    Type: Application
    Filed: October 17, 2019
    Publication date: December 23, 2021
    Inventors: Shintaro TAKASE, Hisafumi IKEDA, Kouta MIYAGAWA, Eiji USAMI
  • Publication number: 20190367981
    Abstract: An object of the present invention is to provide a means for detecting or quantitatively determining short-chain nucleic acids by simple double-strand formation with high specificity. The present invention relates to a polynucleobase probe including, in a sequence complementary to a target sequence having at least one sequence of any one of SEQ ID NOs: 1 to 10, a sequence in which at least one of bases in a portion complementary to any one sequence of SEQ ID NOs: 1 to 10 in the target sequence becomes abasic and/or is substituted; a method for designing the same; and a method for utilizing the same.
    Type: Application
    Filed: February 20, 2018
    Publication date: December 5, 2019
    Applicant: Yokowo Co., Ltd.
    Inventors: Yui Niijima, Shintaro Takase, Hisashi Suzuki, Hisafumi Ikeda
  • Publication number: 20090133747
    Abstract: The main object of the invention is to provide a compound that can be used as a sensitizing dye of a dye-sensitized solar cell, which can realize outstanding endurance and photovoltaic conversion efficiency. 1. A compound shown by the following general formula (1) is therefore provided: (wherein, in the formula (1), Y is a hydroxyl group or an amino group; E1 is N or CH; L is a hydrogen atom or a photosensitizing group; R is a group having one of the basic units D shown by the following general formula (D), or a group having a branched structure wherein a structural unit is repeatedly bonded via a peptide linkage, this structural unit being 1-100 of the basic units D and 1-100 of the basic units G shown by the following general formula (G). The photosensitizing group is bonded to 50% or more of the nitrogen atoms among the nitrogen atoms which do not constitute the peptide linkage of this group, hydrogen atoms being bonded to the remaining nitrogen atoms).
    Type: Application
    Filed: May 23, 2006
    Publication date: May 28, 2009
    Applicant: CREDIA JAPAN CO., LTD. ( A juridical person under the laws of Japan)
    Inventors: Hisafumi Ikeda, Madoka Tonosaki
  • Publication number: 20080234464
    Abstract: An object of the present invention is to provide a compound with a structure wherein amino acid or oligopeptide side chains are bonded to a main chain. The present invention provides a compound represented by the following formula (1). wherein n1 to n3, and m1 to m6 are certain integers; Y is a hydroxyl or an amino group; E is N or CH; R is an amino acid residue, or a peptide residue consisting of 2 to 100 amino acid residues; and L is a hydrogen atom, a group containing a lipid group, a group containing a fatty acid residue, or a group containing a fluorescent group.
    Type: Application
    Filed: April 21, 2006
    Publication date: September 25, 2008
    Inventors: Hisafumi Ikeda, Madoka Tonosaki
  • Publication number: 20080167491
    Abstract: A process for amino acid derivatives shown by the below general formula (I): (wherein R1 means a hydrogen atom or a straight chain or branched chain alkyl group with 1-5 carbon atoms.) having an object to provide a process of the amino acid derivatives of the formula (I) and their synthetic intermediate, t-butoxycarbonylamino-ethylamine, whereby it requires no tedious procedure and is also good in yield, and its application to a mass production is easy, and to provide novel amino acid derivatives of the formula (IV), their synthetic intermediates, and a process thereof, characterized in that it comprises a step to obtain the amino acid derivatives shown by the general formula (I) by hydrolysis of compounds shown by the below formula (II): (wherein R1 has the same meaning as described above, and R2 means a straight chain or branched chain alkyl group with 1-4 carbon atoms.
    Type: Application
    Filed: February 8, 2008
    Publication date: July 10, 2008
    Applicant: CREDIA JAPAN CO., LTD.
    Inventors: Hisafumi Ikeda, Isao Saito, Yushin Nakamura
  • Publication number: 20080138817
    Abstract: A compound represented by general formula (I) below; (in the formula, A denotes B denotes R denotes H, NO2, NH2, NHCbz, Br, F, Cl or SO3Na2, and n is an integer of 1 to 4), and a process for producing the above compound characterised in that it includes a reaction between an activated ester and a t-butoxycarbonylaminoethylamine or an ?-amino acid derivative.
    Type: Application
    Filed: September 7, 2007
    Publication date: June 12, 2008
    Applicant: CREDIA JAPAN CO., LTD.
    Inventors: Hisafumi Ikeda, Isao Saito, Fumihiko Kitagawa
  • Patent number: 7351852
    Abstract: A process for amino acid derivatives shown by the below general formula (I): (wherein R1 means a hydrogen atom or a straight chain or branched chain alkyl group with 1-5 carbon atoms.) having an object to provide a process of the amino acid derivatives of the formula (I) and their synthetic intermediate, t-butoxycarbonylamino-ethylamine, whereby it requires no tedious procedure and is also good in yield, and its application to a mass production is easy, and to provide novel amino acid derivatives of the formula (IV), their synthetic intermediates, and a process thereof, characterized in that it comprises a step to obtain the amino acid derivatives shown by the general formula (I) by hydrolysis of compounds shown by the below formula (II): (wherein R1 has the same meaning as described above, and R2 means a straight chain or branched chain alkyl group with 1-4 carbon atoms.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: April 1, 2008
    Assignee: Credia Japan Co., Ltd.
    Inventors: Hisafumi Ikeda, Isao Saito, Yushin Nakamura
  • Patent number: 7282575
    Abstract: A compound represented by the general formula (I) below: In the formula, A is as defined in the specification and B denotes where n is an integer of 1 to 4, and a process for producing the above compound includes a reaction between an activated ester and a t-butoxycarbonylaminoethylamine or an ?-amino acid derivative.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: October 16, 2007
    Assignee: Credia Japan Co., Ltd.
    Inventors: Hisafumi Ikeda, Isao Saito, Fumihiko Kitagawa
  • Publication number: 20060167224
    Abstract: A functional molecule can be introduced extremely rapidly and with superior cost performance by using a method for producing a functional PNA oligomer that comprises synthesizing a PNA oligomer by reacting a PNA monomer unit having a protected adenine, guanine, cytosine or thymine with Boc-lysine(Fmoc)-OH or Fmoc-lysine(Alloc)-OH, followed by introducing a functional molecule having a free carboxylic acid into said PNA oligomer and de-protecting the protecting group. Moreover, Boc-lysine (Fmoc)-OH or Fmoc-lysine(Alloc)-OH can be produced that functions as a compound and precursor PNA monomer unit synthesized according to this method.
    Type: Application
    Filed: April 15, 2004
    Publication date: July 27, 2006
    Applicant: Credia Japan Co., Ltd.
    Inventors: Madoka Tonosaki, Hisafumi Ikeda
  • Publication number: 20060058508
    Abstract: The object of the present invention is to provide functional PNA monomer units and a novel synthesis method for functional PNA oligomers for introducing a plurality of functional molecules at arbitrary locations by means of linkers having various lengths either directly or post-synthetically even in the case of compounds that are unstable in liquid under acidic, alkaline or neutral conditions, along with novel functional PNA monomer units and functional PNA oligomers. This object is achieved by means of a compound in the form of a functional PNA monomer unit, and production method thereof, represented by the following general formula (I): (wherein R represents H, a functional molecule or a protecting group, and n represents an integer of 1 to 11).
    Type: Application
    Filed: November 17, 2003
    Publication date: March 16, 2006
    Applicant: Credia Japan Co., Ltd.
    Inventors: Hisafumi Ikeda, Shuntaro Kodama, Madoka Tonosaki, Fumihiko Kitagawa
  • Publication number: 20050187402
    Abstract: A process for amino acid derivatives shown by the below general formula (I): (wherein R1 means a hydrogen atom or a straight chain or branched chain alkyl group with 1-5 carbon atoms.) having an object to provide a process of the amino acid derivatives of the formula (I) and their synthetic intermediate, t-butoxycarbonylamino-ethylamine, whereby it requires no tedious procedure and is also good in yield, and its application to a mass production is easy, and to provide novel amino acid derivatives of the formula (IV), their synthetic intermediates, and a process thereof, characterized in that it comprises a step to obtain the amino acid derivatives shown by the general formula (I) by hydrolysis of compounds shown by the below formula (II): (wherein R1 has the same meaning as described above, and R2 means a straight chain or branched chain alkyl group with 1-4 carbon atoms.
    Type: Application
    Filed: April 21, 2005
    Publication date: August 25, 2005
    Applicant: Credia Japan Co., Ltd.
    Inventors: Hisafumi Ikeda, Isao Saito, Yushin Nakamura
  • Patent number: 6919476
    Abstract: A process for amino acid derivatives shown by the below general formula (I): (wherein R1 means a hydrogen atom or a straight chain or branched chain alkyl group with 1-5 carbon atoms.) having an object to provide a process of the amino acid derivatives of the formula (I) and their synthetic intermediate, t-butoxycarbonylamino-ethylamine, whereby it requires no tedious procedure and is also good in yield, and its application to a mass production is easy, and to provide novel amino acid derivatives of the formula (IV), their synthetic intermediates, and a process thereof, characterized in that it comprises a step to obtain the amino acid derivatives shown by the general formula (I) by hydrolysis of compounds shown by the below formula (II): (wherein R1 has the same meaning as described above, and R2 means a straight chain or branched chain alkyl group with 1-4 carbon atoms.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: July 19, 2005
    Assignee: Credia Japan Co., Ltd.
    Inventors: Hisafumi Ikeda, Isao Saito, Yushin Nakamura
  • Patent number: 6809190
    Abstract: A novel method for synthesizing functional PNA having superior cost performance and which enables functional molecules to be introduced extremely rapidly, and compounds used therein. Disclosed is a method for producing a functional PNA oligomer; wherein a PNA monomer unit having adenine, guanine, cytosine or thymine protected by a protecting group is reacted with Fmoc-&ohgr;-amino acid-BocPNA-OH, and after synthesizing PNA oligomer, a functional molecule having free carboxylic acid is introduced into that PNA oligomer followed by deprotecting the protecting group; compounds synthesized by the method; and, Fmoc-&ohgr;-amino acid-BocPNA-OH that functions as a precursor PNA monomer unit.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: October 26, 2004
    Assignee: Credia Japan Co., Ltd.
    Inventors: Hisafumi Ikeda, Madoka Tonosaki
  • Publication number: 20040101839
    Abstract: A compound represented by general formula (I) below; 1
    Type: Application
    Filed: December 24, 2003
    Publication date: May 27, 2004
    Inventors: Hisafumi Ikeda, Isao Saito, Fumihiko Kitagawa
  • Publication number: 20040039224
    Abstract: A process for amino acid derivatives shown by the below general formula (I): 1
    Type: Application
    Filed: April 7, 2003
    Publication date: February 26, 2004
    Inventors: Hisafumi Ikeda, Isao Saito, Yushin Nakamura
  • Publication number: 20030229201
    Abstract: A novel method for synthesizing functional PNA having superior cost performance and which enables functional molecules to be-introduced extremely rapidly, and compounds used therein. Disclosed is a method for producing a functional PNA oligomer; wherein a PNA monomer unit having adenine, guanine, cytosine or thymine protected by a protecting group is reacted with. Fmoc-&ohgr;-amino acid-BocPNA-OH, and after synthesizing PNA oligomer, a functional molecule having free carboxylic acid is introduced into that PNA oligomer followed by deprotecting the protecting group; compounds synthesized by the method; and, Fmoc-&ohgr;-amino acid-BocPNA-OH that functions as a precursor PNA monomer unit.
    Type: Application
    Filed: April 24, 2003
    Publication date: December 11, 2003
    Inventors: Hisafumi Ikeda, Madoka Tonosaki