Patents by Inventor Man Nyoung Kim

Man Nyoung Kim 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).

  • Regioisomerically pure oxochlorins and methods of synthesis
    Patent number: 7408058
    Abstract: A method of making an oxochlorin comprises the steps of oxidizing a chlorin to produce a mixture of hydronchlorin and oxochlorin, and then oxidizing the hydroxychlorin in said mixture, preferably with DDQ, to produce a mixture consisting essentially of oxochlorin. The step of oxidizing a chlorin is carried out by exposing the chlorin to alumina, typically in the presence of an oxidizing agent such as air or alumina. The oxidizing steps may be carried out in an organic solvent such as toluene. The chlorin is preferably a C-methylated chlorin, and is preferably metalated.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: August 5, 2008
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Sreedharan Prathapan, Han-Je Kim, Man Nyoung Kim
  • Regioisomerically pure oxochlorins and methods of synthesis
    Publication number: 20040152887
    Abstract: A method of making an oxochlorin comprises the steps of oxidizing a chlorin to produce a mixture of hydronchlorin and oxochlorin, and then oxidizing the hydroxychlorin in said mixture, preferably with DDQ, to produce a mixture consisting essentially of oxochlorin. The step of oxidizing a chlorin is carried out by exposing the chlorin to alumina, typically in the presence of an oxidizing agent such as air or alumina. The oxidizing steps may be carried out in an organic solvent such as toluene. The chlorin is preferably a C-methylated chlorin, and is preferably metalated.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 5, 2004
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Sreedharan Prathapan, Han-Je Kim, Man Nyoung Kim
  • Regioisomerically pure oxochlorins and methods of synthesis
    Patent number: 6765092
    Abstract: A method of making an oxochlorin comprises the steps of oxidizing a chlorin to produce a mixture of hydroxychlorin and oxochlorin, and then oxidizing the hydroxychlorin in said mixture, preferably with DDQ, to produce a mixture consisting essentially of oxochlorin. The step of oxidizing a chlorin is carried out by exposing the chlorin to alumina, typically in the presence of an oxidizing agent such as air or alumina. The oxidizing steps may be carried out in an organic solvent such as toluene. The chlorin is preferably a C-methylated chlorin, and is preferably metalated.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: July 20, 2004
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Sreedharan Prathapan, Man Nyoung Kim, Han-Je Kim
  • Regioisomerically pure oxochlorins and methods of synthesis
    Publication number: 20020137925
    Abstract: A method of making an oxochlorin comprises the steps of oxidizing a chlorin to produce a mixture of hydroxychlorin and oxochlorin, and then oxidizing the hydroxychlorin in said mixture, preferably with DDQ, to produce a mixture consisting essentially of oxochlorin. The step of oxidizing a chlorin is carried out by exposing the chlorin to alumina, typically in the presence of an oxidizing agent such as air or alumina. The oxidizing steps may be carried out in an organic solvent such as toluene. The chlorin is preferably a C-methylated chlorin, and is preferably metalated.
    Type: Application
    Filed: December 7, 2001
    Publication date: September 26, 2002
    Inventors: Jonathan S. Lindsey, Masahiko Taniguchi, Sreedharan Prathapan, Han-Je Kim, Man Nyoung Kim