Patents by Inventor Il Nam

Il Nam 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).

  • Patent number: 5760263
    Abstract: The present invention relates to ferrocenes containing silylalkyl groups, represented by formula(I) and their preparation methods by reacting ferrocene with allylchlorosilanes represented by formula(II) in the presence of Lewis acid catalysts such as aluminum chloride: ##STR1## wherein R.sup.1 represents hydrogen, C.sub.1 -C.sub.12 alkyl, or C.sub.1 -C.sub.12 alkyl containing phenyl group; R.sup.2 represents chloro, C.sub.1 -C.sub.12 alkyl, or C.sub.1 -C.sub.12 alkyl containing phenyl group; and n and m are 0, 1 or 2, respectively, and at least one of n and m is not zero.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: June 2, 1998
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Nam Jung, Sam Young Ahn, Bok Ryul Yoo, Joon Soo Han
  • Patent number: 5726336
    Abstract: Polyalkylated benzenes containing chlorosilyl groups represented by formula III ##STR1## wherein R.sub.1 represents hydrogen or alkyl; R.sub.2 represents hydrogen or alkyl; R' represents methyl or chloro; and n=3-6.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: March 10, 1998
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Nam Jung, Joon Soo Han, Eun Jeong Cho, Bok Ryul Yoo
  • Patent number: 5302734
    Abstract: The present invention relates to a process for preparing 1,3-disilacyclotutanes by pyrolyzing alkoxytrisilaalkaness at a temperature of from 400.degree. C. to 800.degree. C. at the atmospheric pressure or under the vacuum. This is a new synthetic route of 1,3-disilacyclobutanes which employs readily available starting materials without using alkaline metals or magnesium, affords very good yields, produces very clean product mixtures separable by distillation, and tolerates functionality on silicon.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: April 12, 1994
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Nam Jung, Gyu-Hwan Lee, Jang-Hwan Hong, Seung Ho Yeon
  • Patent number: 5235061
    Abstract: This invention relates to (1H-1,2,4-triazolyl)disilaalkanes as represented by formula I, their preparation, and their use in controlling fungus diseases of living plants. ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 can be independently lower alkyl, vinyl, allyl, benzyl, or substituted phenyl such as para-fluorophenyl, para-chlorophenyl, para-enthoxyphenyl, and biphenyl.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: August 10, 1993
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Nam Jung, Bok Ryul Yoo, Mi Suk Kim, Seung Ho Yoen
  • Patent number: 5138080
    Abstract: The invention is concerned with novel polysilamethylenosilane polymers having polysilane-polycarbosilane skeleton which can be prepared in one-step reaction from mixtures of chlorosilaalkanes and organochlorosilanes with alkali metals in one of appropriate solvents or in combination of solvents thereof. Such polysilamethylenosilane polymers are soluble and thermoplastic, and can be pyrolyzed to obtain improved yields of silicon carbide at atmospheric pressure.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 11, 1992
    Assignee: Korea Institute of Science and Technology
    Inventors: Il-Nam Jung, Gyu-Hwan Lee, Seung-Ho Yeon, Mi-Yeon Suk
  • Patent number: 5087717
    Abstract: Organotrialkoxysilane stabilizers for inorganic silicate corrosion inhibitor additives in antifreezer/coolant formulations are described. The stabilizers have the following structure; ##STR1## wherein R is an alkyl group of 1-4 carbon atoms, R.sub.1 is either ##STR2## and R.sub.2 may be selected from ##STR3## and R.sub.3 is phenyl or ##STR4## These stabilizers help prevent the gelling of the corrosion inhibiting silicate additives in antifreezer/coolant formulations thereby increasing the useful lifetime of such formulations.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: February 11, 1992
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Il Nam Jung, Sang Yo Hwang, Hae Kyung Bae
  • Patent number: 5075477
    Abstract: A novel and improved method for simultaneously producing 2,4,6-trisilaheptane of the following formula (I) and 1,3-disilabutane of the following formula (II), which are the starting material essential for forming silicon polymers: wherein, R is methyl group or chloro group. ##STR1## The method is characterized by reacting silicon and chloromethylsilanes of the following formula (III) at 250.degree. C.-350.degree. C. and in the presence of copper as a catalyst, exclusively or together with cadmium powder as a co-catalyst.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: December 24, 1991
    Assignee: Korea Institute of Science and Technology
    Inventors: Il Nam Jung, Gyu-Hwan Lee, Seung Ho Yeon, Mi-Yeon Suk
  • Patent number: 4965385
    Abstract: Organotrialkoxysilane stabilizers for inorganic silicate corrosion inhibitor additives in antifreezer/coolant formulations are described. The stabilizers have the following structure: ##STR1## wherein R is an alkyl group of 1-4 carbon atoms, R.sub.1 is either ##STR2## and R.sub.2 and R.sub.3 may be same or different and selected from --Ph, --CN, ##STR3## (wherein R is an alkyl group of 1-4 carbon atoms). These stabilizers help prevent the gelation of the corrosion inhibiting silicate additives in antifreezer/coolant formulations so that the silicates could be more persistent in their corrosion inhibiting properties.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: October 23, 1990
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Il Nam Jung, Sang Yo Hwang, Hae Kyung Bae
  • Patent number: 4873011
    Abstract: An antifreeze composition for use in aluminum internal combustion engines is disclosed. It is comprised of from 0.05 percent to 0.5 percent silicate, from 0.07 percent to 0.35 percent nitrate, from 0.2 percent to 2.0 percent phosphate, from 0.5 percent to 4.0 percent benzoate, from 0.1 percent to 1.0 percent molybdate, from 0.02 percent to 0.3 percent vanadate, from 0.05 percent to 0.3 percent triazole, and from 100 ppm to 5000 ppm organosilane stabilizer for the silicate. Organic amines and borates are excluded in the compositions and the pH of the compositions is from about 7 to about 9.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: October 10, 1989
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Il Nam Jung, Sang Yo Hwang, Chung Suk Lee