Patents by Inventor Kathleen S. Laurenzo

Kathleen S. Laurenzo 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: 20030044942
    Abstract: A process for preparing functional sugar polymers comprising transferring a monosaccharide or oligosaccharide to an acceptor, removing by-products, separating polymers which have not achieved the desired chain length and recycling these underdeveloped polymers, and an apparatus for producing same.
    Type: Application
    Filed: April 23, 2002
    Publication date: March 6, 2003
    Inventors: Steven J. Catani, Kathleen S. Laurenzo, Juan L. Navia, Robert E. Walkup
  • Patent number: 6423833
    Abstract: A process for preparing functional sugar polymers comprising transferring a monosaccharide or oligosaccharide to an acceptor, removing by-products, separating polymers which have not achieved the desired chain length and recycling these underdeveloped polymers, and an apparatus for producing same.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: July 23, 2002
    Inventors: Steven J. Catani, Kathleen S. Laurenzo, Juan L. Navia, Robert E. Walkup
  • Patent number: 5968365
    Abstract: A process is described for clarifying a crude inulin extract by ultrafiltration and separating an aqueous inulin solution containing carbohydrates having a range of degrees of polymerization into fractions having different average degrees of polymerization which comprises subjecting an aqueous inulin solution to ultrafiltration through a membrane having a predetermined pore size whereby inulin fractions having average degrees of polymerization less than a predetermined value pass through said membrane as permeate and inulin fractions having average degrees of polymerization greater than said predetermined value are collected as retentate.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: October 19, 1999
    Assignee: McNeil-PPC, Inc.
    Inventors: Kathleen S. Laurenzo, Juan L. Navia, David S. Neiditch
  • Patent number: 5177250
    Abstract: A process is disclosed for the enantioselective hydrogenation of olefins of the formula ##STR1## where R is hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl, Z is ##STR2## where R' is hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl, --CN, C(NH)OR" where R" is C.sub.1 to C.sub.6 linear or branched alkyl, or --C(O)NH.sub.2 ; and Ar is phenyl or naphthyl unsubstituted or substituted with benzoyl or substituted benzoyl, C.sub.1 to C.sub.6 linear or branched alkyl, C.sub.1 to C.sub.6 linear or branched alkoxy, halo, or carboxylic acid or C.sub.1 to C.sub.6 linear or branched alkyl ester thereof, which comprises contacting said aromatic-substituted olefin with a catalytically effective amount of a ruthenium phosphite complex.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: January 5, 1993
    Assignee: Ethyl Corporation
    Inventor: Kathleen S. Laurenzo
  • Patent number: 5166434
    Abstract: A process is disclosed for preparing aromatic-substituted unsaturated amides. The process comprises treating a compound of the formula ##STR1## where Ar is C.sub.6 to C.sub.10 aryl unsubstituted or substituted with at least one halo, amino, nitro, hydroxy, C.sub.1 to C.sub.12 linear or branched alkyl, C.sub.1 to C.sub.12 linear or branched alkoxy or haloalkyl, the alkyl moiety being C.sub.1 to C.sub.6 linear or branched or the group ##STR2## where Ar' is C.sub.6 to C.sub.10 aryl unsubstituted or substituted with at least one halo, amino, nitro, hydroxy, C.sub.1 to C.sub.12 linear or branched alkyl, C.sub.1 to C.sub.12 alkoxy or haloalkyl, the alkyl moiety being C.sub.1 to C.sub.6 linear or branched; and R and R' are the same or different and are hydrogen or C.sub.1 to C.sub.12 linear or branched alkyl and can also be phenyl unsubstituted or substituted with at least one halo, amino, nitro, hydroxy, C.sub.1 to C.sub.12 linear or branched alkyl, C.sub.1 to C.sub.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: November 24, 1992
    Assignee: Ethyl Corporation
    Inventor: Kathleen S. Laurenzo
  • Patent number: 4942260
    Abstract: Amine oxides which have low levels of nitrosamines or are substantially-free of nitrosamines are made by reacting tert-amines with hydrogen peroxide in the presence of carbon dioxide and aluminum metal.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: July 17, 1990
    Assignee: Ethyl Corporation
    Inventors: Kathleen S. Laurenzo, Joe D. Sauer
  • Patent number: 4931596
    Abstract: Hydroxylated primary amines corresponding to the formula:R--X--CH.sub.2 --CH(OH)--CH.sub.2 NH.sub.2 (I)in which R is a saturated or unsaturated straight chain C.sub.5 -C.sub.18 aliphatic radical and X represents --O--, --S--, --NH-- or --CH.sub.2 -- are prepared by reacting an epoxide of the formula: ##STR1## in which R and X are as defined previously and R.sub.1 and R.sub.2 together represent an epoxy radical with ammonium carbamate to form the corresponding substituted ammonium carbamate of the formula: ##STR2## in which R and X are as defined previously and thereafter heating the substituted ammonium carbamate thus formed at a temperature and for a length of time sufficient to form the corresponding hydroxylated primary amine of formula (I).The hydroxylated primary amines of formula (I) and the salts of these compounds, particularly the hydrohalide, acetate and quaternary alkyl ammonium salts thereof are useful as medicaments, anticeptics, sterilizing agents and preservatives.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: June 5, 1990
    Assignee: Ethyl Corporation
    Inventor: Kathleen S. Laurenzo
  • Patent number: 4889954
    Abstract: Tertiary amines are converted to amine oxides in high conversion and at a faster rate by including dialkylcarbonate in the reaction of the tert-amine with aqueous hydrogen peroxide. Ascorbic acid can be used as a co-catalyst.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: December 26, 1989
    Assignee: Ethyl Corporation
    Inventors: Kathleen S. Laurenzo, Dennis P. Bauer
  • Patent number: 4888138
    Abstract: Compounds corresponding to the formula: ##STR1## in which R is a saturated or unsaturated straight chain C.sub.5 -C.sub.18 aliphatic radical and X represents --O--, --S--, --NH-- or --CH.sub.2 -- are provided by reacting compounds corresponding to the formula: ##STR2## in which R and X are as defined above and R.sub.1 and R.sub.2 together represent an epoxy radical with ammonium carbamate.These compounds may be used as intermediates in the preparation of the hydrohalide salts, particularly the hydrochloride and hydrobromide salts, and acetates of hydroxylated primary amines corresponding to the formula:R--X--CH.sub.2 --CH(OH)--CH.sub.2 NH.sub.2 (III)in which R and X are as defined above which are useful as medicaments, antiseptics, sterilizing agents and preservatives.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: December 19, 1989
    Assignee: Ethyl Corporation
    Inventor: Kathleen S. Laurenzo