Patents by Inventor Yeong-Jen Kuo

Yeong-Jen Kuo 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).

  • Catalyst compositions and the use thereof in the hydrogenation of carboxylic acid esters
    Patent number: 5334779
    Abstract: Disclosed are catalyst compositions comprised of the oxides of copper, zinc, and a third element selected from the group consisting of aluminum, magnesium, zirconium, and mixtures thereof, and the use of such catalyst compositions in the hydrogenation of carbonyl compounds such as carboxylate esters to obtain the alcohol corresponding to the acid residue of the ester.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: August 2, 1994
    Assignee: Eastman Kodak Company
    Inventor: Yeong-Jen Kuo
  • Preparation of dimethyl cyclohexanedicarboxylates
    Patent number: 5319129
    Abstract: Disclosed is a process for the preparation of a dimethyl cyclohexanedicarboxylate by the hydrogenation of the analogous dimethyl benzenedicarboxylate ester in the presence of a class of palladium on alumina catalysts which have a unique combination of characteristics. The use of the catalysts permits the process to be carried out at significantly lower process pressures.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: June 7, 1994
    Assignee: Eastman Kodak Company
    Inventors: Bruce L. Gustafson, Yeong-Jen Kuo, Brent A. Tennant
  • Low pressure process for the hydrogenation of dimethyl benzenedicarboxylates to the corresponding dimethyl cyclohexanedicarboxlates
    Patent number: 5286898
    Abstract: Disclosed is a process for the preparation of a dimethyl cyclohexanedicarboxylate by the hydrogenation of the corresponding dimethyl benzenedicarboxylate ester in the presence of a class of a supported catalysts comprising palladium and a second Group VIII metal selected from nickel, platinum, ruthenium or a mixture thereof deposited on an alumina support which have a unique combination of characteristics. The use of the catalysts permits the process to be carried out at significantly lower process pressures.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: February 15, 1994
    Assignee: Eastman Kodak Company
    Inventors: Bruce L. Gustafson, Brent A. Tennant, Yeong-Jen Kuo, Timothy W. Price
  • Purification of quinones
    Patent number: 5180842
    Abstract: Disclosed is a process for removing chlorine-containing impurities from quinone compounds such as p-bezonquinone. The process involves extracting a quinone compound containing 1000 ppm or more chlorine with heptane, cyclohexane or a mixture thereof and separating the quinone compound from the extraction mixture. The process provides a means for obtaining quinone compounds containing 50 ppm or less chlorine.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: January 19, 1993
    Assignee: Eastman Kodak Company
    Inventors: Yeong-Jen Kuo, Michael Bellas
  • Process for the preparation of quinhydrones
    Patent number: 5149849
    Abstract: Disclosed is a process for the preparation of quinhydrones by the catalytic oxidation of aromatic diols with a peroxide in the presence of a catalyst system comprising a cerium carboxylate and a cupric carboxylate.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: September 22, 1992
    Inventors: Michael Bellas, Yeong-Jen Kuo, Fred H. Rash
  • Preparation of quinones by the ceric-catalyzed oxidation of aromatic diols
    Patent number: 5107003
    Abstract: Disclosed is a process for the preparation of quinones by the catalytic oxidation of aromatic diols with a peroxide in the presence of a catalytic amount of ceric trihydroxyhydroperoxide.
    Type: Grant
    Filed: March 18, 1990
    Date of Patent: April 21, 1992
    Assignee: Eastman Kodak Company
    Inventors: Yeong-Jen Kuo, Michael Bellas, Phillip M. Hudnall
  • Preparation of quinones
    Patent number: 5075463
    Abstract: Disclosed is a process for the preparation of quinones by the catalytic oxidation of aromatic diols with a peroxide in the presence of a catalytic amount of certain cerium carboxylate salts.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: December 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: Yeong-Jen Kuo, Michael Bellas
  • Process for the preparation of quinones
    Patent number: 5075462
    Abstract: Disclosed is a process for the preparation of quinones by the catalytic oxidation of aromatic diols with a peroxide in the presence of a catalyst system comprising a cerium carboxylate and a cupric carboxylate.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: December 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: Yeong-Jen Kuo, Michael Bellas