Patents by Inventor Jeffrey S. DuPont

Jeffrey S. DuPont 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: 6703523
    Abstract: A zwitterionic polyetherpolyamine comprising a linear or branched polyetherpolyamine backbone having 2 to 10 tertiary amino nitrogen atoms and a molecular weight of from 100 to 800, at least one tertiary amine end group of the polyetherpolyamine backbone contains two groups having the formula wherein A means an ethylene oxide unit, a propylene oxide unit, a unit of butylene oxides and a tetrahydrofuran unit, n is a number of from 1 to 50, X is an anionic group, with the proviso that in formula II one X may also be hydrogen and M is hydrogen, alkali metal or ammonium, or contains one group of formula I or II and one group selected from radicals consisting of C1- to C22-alkyl and C7- to c22-aralkyl, the meaning of A and n is the same as in formula I or II, said zwitterionic polyetherpolyamine having a molecular weight up to 9,000 and optionally containing up to 100% of the nitrogen atoms quaternized, and a process for the production of zwitterionic polyetherpolyamines by
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: March 9, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Boeckh, Oliver Borzyk, Michael Ehle, Ralf Nörenberg, Eugene P. Gosselink, Jeffrey S. DuPont, Robert H. Rohrbaugh, Kenneth N. Price, Randall S. Deinhammer
  • Patent number: 6673890
    Abstract: A zwitterionic polyamine comprising a linear or branched hydrophobic polyamine backbone having 2 to 10 tertiary amino nitrogen atoms and a spacer between two tertiary nitrogen atoms wherein the spacer is, for example selected from C8-C16-alkylene, C5-C15-cyloalkylene, wherein in formula (IV) R═C1- to C22-alkyl or C7-C22-aralkyl and n=3 to 6, at least one tertiary amine end group of the polyamine backbone contains two groups having formula (V) or (VI), wherein A means an ethylene oxide unit, a propylene oxide unit, a unit of butylene oxides and a tetrahydrofuran unit, n is a number of from 1 to 50, X is an anionic group such as —SO3M, with the proviso that in formula (VI) one X may also be hydrogen and M is hydrogen, alkai metal or ammonium, or contains one group of formula (V) or (VI) and one group selected from radicals consisting of formula (VII), C1- to C22-alkyl and C7-C22-aralkyl the meaning of A and n is the same as in formula (V) or (VI), said zwitterionic polyetherpolyamine having a
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: January 6, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Boeckh, Oliver Borzyk, Michael Ehle, Ralf Nöerenberg, Eugene P. Gosselink, Jeffrey S. DuPont, Robert H. Rohrbaugh, Kenneth N. Price, Randall S. Deinhammer
  • Publication number: 20030228998
    Abstract: The present invention relates to hydrophobically modified polyamines and laundry detergent compositions which comprise said polyamines, said compositions comprising:
    Type: Application
    Filed: August 30, 2002
    Publication date: December 11, 2003
    Applicant: The Procter & Gamble Company
    Inventors: Jeffrey S. Dupont, Eugene P. Gosselink, Kenneth N. Price, Robert H. Rohrbaugh
  • Patent number: 5565556
    Abstract: Starch is oxidized in a controlled manner using nitric acid, sulfuric acid and vanadium catalyst. The resulting oxidized starch is useful in detergent compositions as a dispersant, builder and cleaning auxiliary.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: October 15, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Stephen W. Heinzman, Jeffrey S. Dupont
  • Patent number: 5534642
    Abstract: Chemical synthesis of amido acids, and their conversion to amido acid phenyl ester sulfates for use as bleach activators, starting from carboxylic acids and lactams.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: July 9, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Stephen W. Heinzman, Jeffrey S. Dupont, William C. Tettenhorst
  • Patent number: 5414099
    Abstract: Chemical synthesis of amido acids, and their conversion to amido acid phenyl ester sulfates for use as bleach activators, starting from carboxylic acids and lactams.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: May 9, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Stephen W. Heinzman, Jeffrey S. Dupont, William C. Tettenhorst