Patents by Inventor Dennis Scott Donald

Dennis Scott Donald 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).

  • Inks with enhanced substrate binding characteristics
    Patent number: 6306994
    Abstract: The present invention relates to block copolymer dispersants comprising a hydrophobic block and a hydrophilic block having at least one polymerized monomer including a primary amine functionality. The inventive block copolymer dispersant is used to make aqueous dispersants such as inks that have enhanced paper binding characteristics.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: October 23, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dennis Scott Donald, Walter Raymond Hertler, Sheau-Hwa Ma
  • Olefin polymerization process
    Patent number: 6103920
    Abstract: Disclosed herein is a process for the polymerization of ethylene, norbornenes and styrenes, by contacting in solution a selected nickel compound and a selected compound which is or can coordinated to the nickel with the olefin(s). The polymers produced are useful for films and molding resins.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: August 15, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Lynda Kaye Johnson, Jerald Feldman, Kristina Ann Kreutzer, Stephan James Mclain, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Dennis Scott Donald, Lissa Taka Jennings Nelson, Anju Parthasarathy, Xing Shen, Wilson Tam, Yueli Wang
  • Olefin polymerization process
    Patent number: 5714556
    Abstract: Disclosed herein is a process for the polymerization of ethylene, norbornenes and styrenes, by contacting in solution a selected nickel compound and a selected compound which is or can coordinated to the nickel with the olefin(s). The polymers produced are useful for films and molding resins.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: February 3, 1998
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Lynda Kaye Johnson, Jerald Feldman, Kristina Ann Kreutzer, Stephan James McLain, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Dennis Scott Donald, Lissa Taka Jennings Nelson, Anju Parthasarathy, Xing Shen, Wilson Tam, Yueli Wang
  • Aminodicyanopyrazines for controlling plant disease
    Patent number: 4054655
    Abstract: Method of controlling plant diseases, particularly late blight and apple scab, with aminodicyanopyrazines, such as 2-t-butylamino-3-chloro-5,6-dicyanopyrazine; and agricultural compositions containing these compounds.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: October 18, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dennis Scott Donald
  • Diimidazopyrazines and tetracarboxamidopyrazines
    Patent number: 3959277
    Abstract: Diimidazopyrazines of the formula: ##SPC1##Wherein R.sup.1 and R.sup.2 are selected from the group consisting of lower alkyl and aryl of 6 to 12 carbons which may be optionally substituted are described. These compounds are useful as brightening agents. They are prepared from tetracarboxamidopyrazines of the formula: ##SPC2##Wherein the R's are as specified above for R.sup.1 and R.sup.2.
    Type: Grant
    Filed: February 20, 1974
    Date of Patent: May 25, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dennis Scott Donald