Patents by Inventor Zen-Yu Chang

Zen-Yu Chang 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).

  • Publication number: 20040250468
    Abstract: Aviation fuel, such as jet fuel, blends and methods for improving cold flow properties of such fuels at extremely low temperatures are disclosed. Cold flow properties of, for example, JP-8 jet fuel are improved by addition to the fuel of an oil-soluble, polar nitrogen-containing compound. Demonstratable cold flow improvement of such fuels at temperatures of about −53° C. and lower is shown.
    Type: Application
    Filed: June 12, 2003
    Publication date: December 16, 2004
    Applicant: General Electric Company
    Inventors: Fang Deng, William S. Carey, Zen-Yu Chang, Sherif Eldin, Alan E. Goliaszewski
  • Publication number: 20040076542
    Abstract: The corrosion of metals in contact with aqueous alkanolamine solutions in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a polythiaether compound.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 22, 2004
    Inventors: Zen-Yu Chang, Liliana Minevski, Ping Lue
  • Publication number: 20040010963
    Abstract: The present invention relates to additives for enhancing the lubricity of hydrocarbon fuel oils, the inventive additive composition including one or more of the reaction products of (i) an alkylated polyamine and (ii) urea or isocyanate, or the salt adducts of these reaction products. More particularly, the present invention provides for a process for improving the lubricity of hydrocarbon fuel oils, which are low in inherent lubricity due to treatment to reduce sulfur and aromatic components for improved emissions.
    Type: Application
    Filed: July 16, 2002
    Publication date: January 22, 2004
    Applicant: BetzDearborn, Inc.
    Inventors: Collin W. Cross, Zen-Yu Chang, S. Blake Pruett, Alan E. Goliaszewski
  • Patent number: 6255311
    Abstract: A method for controlling wheat powdery mildew is provided which encompasses applying to the plant, seed, seedling or portion of the plant to be protected, or, to its growing media, an effective amount of a compound of Formula II where Q is O, n is 0, R3 is halogen, R4 is halogen or hydrogen, R5 is an alkyl group having from three to five carbon atoms and R6 is an alkyl group having from three to eight carbon atoms. Also provided are certain compositions for controlling wheat powdery mildew which contain a compound of Formula II together with a surfactant, an organic solvent and/or a solid or liquid diluent. Also provided are certain fungicidal compounds within Formula II for controlling wheat powdery mildew.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James Francis Bereznak, Zen-Yu Chang, Thomas Paul Selby, Charlene Gross Sternberg
  • Patent number: 6245770
    Abstract: Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which are useful as fungicides wherein W is O, S(O)n or NR5; n is 0, 1 or 2; Q is O or S; G is a fused phenyl, naphthalene, thiophene, furan, pyrrole, pyridine, thiazole, oxazole, imidazole, pyrazine, pyridazine or pyrimidine ring; and R1-R5 are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula I and a method for controlling plant diseases caused by fungal plant pathogens which involves applying an effective amount of a compound of Formula I.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: June 12, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James Francis Bereznak, Zen-Yu Chang, Charlene Gross Sternberg
  • Patent number: 6066638
    Abstract: Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which are useful as fungicides ##STR1## wherein W is O, S(O).sub.n or NR.sup.5 ;n is 0, 1 or 2;Q is O or S;G is a fused phenyl, naphthalene, thiophene, furan, pyrrole, pyridine, thiazole, oxazole, imidazole, pyrazine, pyridazine or pyrimidine ring; andR.sup.1 -R.sup.5 are as defined in the disclosure.Also disclosed are compositions containing the compounds of Formula I and a method for controlling plant diseases caused by fungal plant pathogens which involves applying an effective amount of a compound of Formula I.
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: May 23, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James Francis Bereznak, Zen-Yu Chang, Charlene Gross Sternberg
  • Patent number: 5945423
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: August 31, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James Francis Bereznak, Zen-Yu Chang, Thomas Paul Selby, Charlene Gross Sternberg
  • Patent number: 5747497
    Abstract: This invention pertains to compounds of Formulae I, II and III, as defined in the disclosure and claims, including all geometric and stereoisomers, N-oxides, agriculturally suitable salts thereof, agricultural compositions containing them and their use as fungicides.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: May 5, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James Francis Bereznak, Zen-Yu Chang, Thomas Paul Selby, Charlene Gross Sternberg