Patents by Inventor Dong J. Lee

Dong J. Lee 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).

  • Method for production of L-phenylalanine by recombinant E. coli
    Patent number: 5304475
    Abstract: A novel E. coli (KCCM 10,013) which can produce high yields of L-phenylalanine and a method for production of L-phenylalanine by recombinant E. coli which may be transformed with a novel plasmid pMW16 containing two promoters and a temperature-sensitive repressor for expressing a pheA gene and an aroF gene wherein chorismate mutase p-prephenate dehydratase is coded for by the pheA gene and 3-deoxy-D-arabinoheptulosonate.7-phosphate synthase is coded for by the aroF gene.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: April 19, 1994
    Assignee: Miwon Co., Ltd.
    Inventors: Hwa Y. Kim, Hong Rhym, Dong J. Lee, Chan H. Won, Byung L. Lim, Hong G. Choi
  • Preparation of denatured bismaleimide di secondary diamine resin
    Patent number: 5071947
    Abstract: A denatured bismaleimide resin of repeating units represented by the following formula (I) and process for preparing same which comprises the Michael addition reaction of a bismaleimide and an aromatic secondary diamine: ##STR1## wherein, n represents an integer of 1 to 3, A represents a divalent group having from 2 to 20 carbon atoms,A' represents a divalent group having less than 20 carbon atoms which includes at least one or more aromatic groups, andR represents aliphatic having from 1 to 10 carbon atoms.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: December 10, 1991
    Assignee: Lucky, Ltd.
    Inventors: Jong K. Yeo, Chung S. Kim, Dong J. Lee
  • Thermosetting polyimide resin composition
    Patent number: 5004774
    Abstract: A thermosetting polymide resin composition having an excellent molding processing property, heat resistance, low mold shrinkage, and good external appearance of its manufacture which comprises a modified bismaleimide resin prepared by reacting the Michael addition reaction of bismaleimides with aromatic primary diamines and aromatic secondary diamines, an inorganic filler, silicone oil, and a mixed catalyst composed of organic peroxides and imidazoles.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: April 2, 1991
    Assignee: Lucky, Ltd.
    Inventors: Jong K. Yeo, Chung S. Kim, Dong J. Lee, Sung H. Jang