Patents by Inventor Masaaki Kai

Masaaki Kai 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).

  • THREE-DIMENSIONAL MEMORY DEVICE INCLUDING LATERALLY SEPARATED SOURCE LINES AND METHOD OF MAKING THE SAME
    Publication number: 20240127864
    Abstract: A memory device includes a first memory block containing first word lines and a first source layer segment, and a second memory block containing second word lines and a second source layer segment which is electrically isolated from the first source layer segment. The first word lines in the first memory block are electrically connected to the respective second word lines in the second memory block.
    Type: Application
    Filed: July 11, 2023
    Publication date: April 18, 2024
    Inventors: Masaaki HIGASHITANI, James KAI, Johann ALSMEIER
  • Uracil-specific fluorescence detection reaction and method for examining dihydropyrimidine dehydrogenase deficiency
    Patent number: 8871520
    Abstract: The invention provides a method of detecting uracil. The method comprises reacting uracil with a compound represented by the formula (I) in the presence of an oxidant and a base to produce a fluorescent compound represented by the formula (II).
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: October 28, 2014
    Assignee: Nagasaki University
    Inventors: Masaaki Kai, Takayuki Shibata
  • URACIL-SPECIFIC FLUORESCENCE DETECTION REACTION AND METHOD FOR EXAMINING DIHYDROPYRIMIDINE DEHYDROGENASE DEFICIENCY
    Publication number: 20130052678
    Abstract: The invention provides a method of detecting uracil. The method comprises reacting uracil with a compound represented by the formula (I) in the presence of an oxidant and a base to produce a fluorescent compound represented by the formula (II).
    Type: Application
    Filed: March 1, 2011
    Publication date: February 28, 2013
    Applicant: NAGASAKI UNIVERSITY
    Inventors: Masaaki Kai, Takayuki Shibata
  • Luminescent polymer and use thereof in bioassay
    Patent number: 8183060
    Abstract: It is an object of the present invention to provide a luminescent polymer that is useful as a luminescent signal probe for labeling and detecting a target substance at high sensitivity in bioassay, and to provide the application of said luminescent polymer to bioassay. The luminescent polymer of the present invention comprises at least one biotin covalently attached to a polymer that includes monosaccharide or amino acid as a constituent monomer covalently attached to a luminescent substance. Preferably, two or more biotins are attached. Examples of the above-mentioned luminescent substance include cyanoisoindoles, luminols, and acridinium esters, and examples of the polymer include polysaccharides, polyamino acids, peptides, polypeptides, and proteins.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: May 22, 2012
    Assignees: Daiichi Pure Chemicals Co., Ltd.
    Inventor: Masaaki Kai
  • Luminescent polymer and use thereof in bioassay
    Publication number: 20050019573
    Abstract: It is an object of the present invention to provide a luminescent polymer that is useful as a luminescent signal probe for labeling and detecting a target substance at high sensitivity in bioassay, and to provide the application of said luminescent polymer to bioassay. The luminescent polymer of the present invention comprises at least one biotin covalently attached to a polymer that includes monosaccharide or amino acid as a constituent monomer covalently attached to a luminescent substance. Preferably, two or more biotins are attached. Examples of the above-mentioned luminescent substance include cyanoisoindoles, luminols, and acridinium esters, and examples of the polymer include polysaccharides, polyamino acids, peptides, polypeptides, and proteins.
    Type: Application
    Filed: September 19, 2002
    Publication date: January 27, 2005
    Inventor: Masaaki Kai