Patents by Inventor Doyoung Ra

Doyoung Ra 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).

  • REFINED ROUTES TO CHLORIN BUILDING BLOCKS
    Publication number: 20120277420
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Application
    Filed: June 5, 2012
    Publication date: November 1, 2012
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • Refined routes to chlorin building blocks
    Patent number: 8212055
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: July 3, 2012
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • REFINED ROUTES TO CHLORIN BUILDING BLOCKS
    Publication number: 20100204465
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Application
    Filed: January 25, 2010
    Publication date: August 12, 2010
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • Refined routes to chlorin building blocks
    Patent number: 7678900
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: March 16, 2010
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • REFINED ROUTES TO CHLORIN BUILDING BLOCKS
    Publication number: 20090069558
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Application
    Filed: November 14, 2008
    Publication date: March 12, 2009
    Applicant: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • Refined routes to chlorin building blocks
    Patent number: 7470785
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: December 30, 2008
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • Refined routes to chlorin building blocks
    Patent number: 6946552
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: September 20, 2005
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning M, Thiagarajan Balasubramanian
  • Refined routes to chlorin building blocks
    Publication number: 20050165228
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Application
    Filed: March 4, 2005
    Publication date: July 28, 2005
    Inventors: Jonathan Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian
  • Refined routes to chlorin building blocks
    Publication number: 20030096989
    Abstract: A method of making chlorins comprises the steps of reacting (e.g. condensing) a dipyrrin western half intermediate with an eastern half intermediate to form a tetrahydrobilene, and then cyclizing the tetrahydrobilene to form a chlorin. Intermediates including tetrahydrobilenes useful in such reactions are also described.
    Type: Application
    Filed: May 8, 2002
    Publication date: May 22, 2003
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Doyoung Ra, Guoning Mo, Thiagarajan Balasubramanian