Patents by Inventor Eric I. Johnson

Eric I. Johnson 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).

  • Genetic sequences encoding substrate-specific dihydroflavonol 4-reductase and uses therefor
    Patent number: 6660908
    Abstract: The invention includes modified dihydroflavonol 4-reductase (DFR) nucleic acids encoding the modified DFR that has altered amino acid sequences at the substrate specificity determining region. The property of the modified DFR is characterized by its ability to reduce dihydrokaempferol (DHK) preferentially over dihydroquercetin (DHQ), and dihydromyricetin (DHM). The invention also includes plants having at least one cell expressing the modified DFR. Such plants are characterized by the increased content of pelargonidin-based pigments. The invention also includes vectors comprising at least a portion of the modified DFR nucleic acids. The invention also includes methods using such vectors for producing plants having the increased content of pelargonidin-based pigments.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: December 9, 2003
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Giltsu Choi, Eric I Johnson, Hankuil Yi, Byongchul Shin
  • Genetic sequences encoding substrate-specific dihydroflavonol 4-reductase and uses therefor
    Patent number: 6555734
    Abstract: The invention includes modified dihydroflavonol 4-reductase (DFR) nucleic acids encoding the modified DFR that has altered amino acid sequences at the substrate specificity determining region. The property of the modified DFR is characterized by its ability to reduce dihydrokaempferol (DHK) preferentially over dihydroquercetin (DHQ), and dihydromyricetin (DHM). The invention also includes plants having at least one cell expressing the modified DFR. Such plants are characterized by the increased content of pelargonidin-based pigments. The invention also includes vectors comprising at least a portion of the modified DFR nucleic acids. The invention also includes methods using such vectors for producing plants having the increased content of pelargonidin-based pigments.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: April 29, 2003
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Giltsu Choi, Eric I. Johnson, Hankuil Yi, Byongchul Shin
  • Genetic sequences encoding substrate-specific dihydroflavonol 4-reductase and uses therefor
    Publication number: 20020120959
    Abstract: The invention includes modified dihydroflavonol 4-reductase (DFR) nucleic acids encoding the modified DFR that has altered amino acid sequences at the substrate specificity determining region. The property of the modified DFR is characterized by its ability to reduce dihydrokaempferol (DHK) preferentially over dihydroquercetin (DHQ), and dihydromyricetin (DHM). The invention also includes plants having at least one cell expressing the modified DFR. Such plants are characterized by the increased content of pelargonidin-based pigments. The invention also includes vectors comprising at least a portion of the modified DFR nucleic acids. The invention also includes methods using such vectors for producing plants having the increased content of pelargonidin-based pigments.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 29, 2002
    Inventors: Giltsu Choi, Eric I. Johnson, Hankuil Yi, Byongchul Shin
  • Genetic sequences encoding substrate-specific dihydroflavonol 4-reductase and uses therefor
    Publication number: 20020120954
    Abstract: The invention includes modified dihydroflavonol 4-reductase (DFR) nucleic acids encoding the modified DFR that has altered amino acid sequences at the substrate specificity determining region. The property of the modified DFR is characterized by its ability to reduce dihydrokaempferol (DHK) preferentially over dihydroquercetin (DHQ), and dihydromyricetin (DHM). The invention also includes plants having at least one cell expressing the modified DFR. Such plants are characterized by the increased content of pelargonidin-based pigments. The invention also includes vectors comprising at least a portion of the modified DFR nucleic acids. The invention also includes methods using such vectors for producing plants having the increased content of pelargonidin-based pigments.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 29, 2002
    Inventors: Giltsu Choi, Eric I. Johnson, Hankuil Yi, Byongchul Shin