Patents by Inventor Eun Mee Goh

Eun Mee Goh 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 preparation of 1,1-diamino-2,2-dinitroethylene
    Patent number: 8415503
    Abstract: Disclosed is a method for preparation of 1,1-diamino-2,2-dinitroethylene (DADNE) through the hydrolysis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine (DHDNDP) obtained by the nitration of 4,6-dihydroxy-2-methylpyrimidine (DHMP), which can avoid eruption or sudden frothing of a reaction solution on a lab scale and even a large scale preparation as well as reduce the reaction time.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: April 9, 2013
    Assignee: Agency for Defense Development
    Inventors: Eun Mee Goh, Jin Seuk Kim
  • METHOD FOR PREPARATION OF 1,1-DIAMINO-2,2-DINITROETHYLENE
    Publication number: 20120178968
    Abstract: Disclosed is a method for preparation of 1,1-diamino-2,2-dinitroethylene (DADNE) through the hydrolysis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine (DHDNDP) obtained by the nitration of 4,6-dihydroxy-2-methylpyrimidine (DHMP), which can avoid eruption or sudden frothing of a reaction solution on a lab scale and even a large scale preparation as well as reduce the reaction time.
    Type: Application
    Filed: July 6, 2011
    Publication date: July 12, 2012
    Inventors: Eun Mee Goh, Jin Seuk Kim
  • Method for the nitration of 4,6-dihydroxy-2-methylpyrimidine
    Patent number: 8158788
    Abstract: Disclosed is a method for the nitration of 4,6-dihydroxy-2-methylpyrimidine for the synthesis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine which is used as a precursor of 1,1-diamino-2,2-dinitroethylene, one type of explosives. The present invention provides an improved method for the nitration of 4,6-dihydroxy-2-methylpyrimidine, wherein organic solvent is applied in the nitration process of 4,6-dihydroxy-2-methylpyrimidine thereby solving the safety problem while improving the yield of nitration.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: April 17, 2012
    Assignee: Agency for Defense Development
    Inventors: Eun Mee Goh, Jin Seuk Kim, Jin Rai Cho, Hyoun-Soo Kim
  • Method for preparation of 2,4-dinitroimidazole which is an intermediate for insensitive meltcastable molecular explosive
    Patent number: 8119679
    Abstract: The present invention provides a method for preparing 2,4-dinitroimidazole, wherein separation of 1,4-donitroimidazole in powder form is avoided so that it is possible to eliminate allergy problems in workers and simplify the process, thereby improving process economy.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: February 21, 2012
    Assignee: Agency for Defense Development
    Inventors: Jin Seuk Kim, Seung Hee Kim, Jin Rae Cho, Eun Mee Goh
  • METHOD FOR PREPARATION OF 2,4-DINITROIMIDAZOLE WHICH IS AN INTERMEDIATE FOR INSENSITIVE MELTCASTABLE MOLECULAR EXPLOSIVE
    Publication number: 20110275830
    Abstract: The present invention provides a method for preparing 2,4-dinitroimidazole, wherein separation of 1,4-donitroimidazole in powder form is avoided so that it is possible to eliminate allergy problems in workers and simplify the process, thereby improving process economy.
    Type: Application
    Filed: March 8, 2011
    Publication date: November 10, 2011
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Jin Seuk KIM, Seung Hee KIM, Jin Rae CHO, Eun Mee GOH
  • METHOD FOR THE NITRATION OF 4,6-DIHYDROXY-2-METHYLPYRIMIDINE
    Publication number: 20100081811
    Abstract: Disclosed is a method for the nitration of 4,6-dihydroxy-2-methylpyrimidine for the synthesis of 4,6-dihydroxy-5,5-dinitro-2-(dinitromethylene)-2,5-dihydropyrimidine which is used as a precursor of 1,1-diamino-2,2-dinitroethylene, one type of explosives. The present invention provides an improved method for the nitration of 4,6-dihydroxy-2-methylpyrimidine, wherein organic solvent is applied in the nitration process of 4,6-dihydroxy-2-methylpyrimidine thereby solving the safety problem while improving the yield of nitration.
    Type: Application
    Filed: February 26, 2009
    Publication date: April 1, 2010
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Eun Mee GOH, Jin Seuk KIM, Jin Rai CHO, Hyoun-Soo KIM
  • Preparation method of 2,2'-bi-1H-imidazole using glyoxal and an ammonium salt
    Patent number: 6713631
    Abstract: Disclosed is a preparation method of 2,2′-bi-1H-imidazole using glyoxal and an ammonium salt as starting materials through a safe, simple and easily controlled synthetic process with a high yield.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: March 30, 2004
    Assignee: Agency for Defense Development
    Inventors: Jin Rai Cho, Soo Gyeong Cho, Eun Mee Goh, Jae Kyung Kim
  • Preparation method of 2,2'-bi-1H-imidazole using glyoxal and an ammonium salt
    Publication number: 20030199700
    Abstract: Disclosed is a preparation method of 2,2′-bi-1H-imidazole using glyoxal and an ammonium salt as starting materials through a safe, simple and easily controlled synthetic process with a high yield.
    Type: Application
    Filed: March 6, 2003
    Publication date: October 23, 2003
    Applicant: Agency For Defense Development
    Inventors: Jin Rai Cho, Soo Gyeong Cho, Eun Mee Goh, Jae Kyung Kim
  • Preparation method of 3-nitro-1,2,4-triazol-5-one by a process minimizing heat generation during crystallization
    Patent number: 6583293
    Abstract: A preparation method of 3-nitro-1,2,4-triazol-5-one using 1,2,4-triazol-5-one (TO) and mixed acid through a stable nitration process which can minimize a large exotherm and associated frothing problem during crystallization by inducing a crystal nucleus to be generated at a low temperature of 35° C.-45° C.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: June 24, 2003
    Assignee: Agency for Defense Development
    Inventors: Hyung Sik Kim, Eun Mee Goh, Bang Sam Park