Patents by Inventor Sang H. Jung

Sang H. Jung 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).

  • Organic compound having an acetylene group, vacuum deposition polymerization thereof, deposited polymerized thin film, and electroluminescence device containing same
    Publication number: 20020018912
    Abstract: The present invention relates to an organic compound having acetylene group(s), a thin film formed by vacuum deposition polymerization using said organic compound, vacuum deposition polymerization to form said thin film, and an electroluminescence device containing said thin film. More particularly, the present invention relates to an organic compound having at least one acetylene groups, vacuum deposition polymerization in which said organic compound is deposited on the substrate and simultaneously or then polymerized by heat treatment or UV irradiation to form a polymer thin film, and an electroluminescence device using at least one layer of said thin film.
    Type: Application
    Filed: January 3, 2001
    Publication date: February 14, 2002
    Inventors: Sang H Jung, Chang J. Lee, Yong K. Kang, Sung K. Lee, Hee J. Kim
  • Process for the preparation of pyrethroid type ester compounds
    Patent number: 4874887
    Abstract: The present invention relates to a novel process for the preparation of insecticidally active esters of the general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are the same or diferent from each other and represent a hydrogen or a halogen atom; R.sub.3 represents ##STR2## (wherein R.sub.4 and R.sub.5 represent a chlorine or bromine atom or a methyl group when R.sub.4 is identical to R.sub.5, but R.sub.4 represents a chlorine or bromine atom or a methyl group and R.sub.5 represents a trifluoromethyl group when R.sub.4 is different from R.sub.5, and R.sub.6 represents a halogen atom or a difluoromethoxy group); and R.sub.8 represents a hydrogen or a cyano group.The characteristic of the present invention is a one-step procedure comprising directly condensing an organic acid, an aldehyde (and a water-soluble cyanide) in the presence of a phase transfer catalyst and a water-soluble inorganic base by the use of a sulphonyl compound as a condensing reagent.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: October 17, 1989
    Assignee: Lucky, Ltd.
    Inventors: Sang H. Jung, Seung K. Kim