Patents Represented by Attorney Katherine L. Stewart
  • Patent number: 5589030
    Abstract: This invention relates generally to a method for extracting lignosulfonate for the manufacture of vanillin and other specialty chemicals. Specifically, the invention relates to a method for recovering lignosulfonates from newsprint comprising the steps of:a) converting newsprint to a crumb pulp comprising of from about 20% to about 50% crumb pulp fiber solids by weight on an oven dry basis and the remainder water;b) cooking the crumb pulp in a medium comprising crumb pulp and cooking acid solution selected from the group consisting of sodium bisulfite, magnesium bisulfite, ammonium bisulfite, calcium bisulfite or mixtures thereof wherein the weight ratio of cooking acid solution to the crumb pulp fiber is from about 3 to about 6 for sufficient time and sufficient temperature and pressure for lignosulfonate removal;c) separating the crumb pulp fiber from the spent sulfite liquor; andd) recovering the lignosulfonates from the spent sulfite liquor.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: December 31, 1996
    Assignee: Rhone-Poulenc Inc.
    Inventors: Walter E. Sande, Karl D. Sears
  • Patent number: 5534349
    Abstract: Uniform, free-flowing, non-friable P.sub.2 S.sub.5 granules having a predetermined reactivity can be produced by accretion by spraying molten P.sub.2 S.sub.5 Sonto cascading, smaller solid particles of P.sub.2 S.sub.5. The process can be used to produce any reactivity grade of P.sub.2 S.sub.5 by adjusting processing conditions. The process can also be used to produce P.sub.2 S.sub.5 in a form suitable for bulk shipping.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: July 9, 1996
    Inventors: Jean M. Bacardi, Robert L. Camerer, Andrew M. Huey, Arthur R. Shirley, Jr.
  • Patent number: 5505885
    Abstract: Uniform, free-flowing, non-friable P.sub.2 S.sub.5 granules having a predetermined reactivity can be produced by accretion by spraying molten P.sub.2 S.sub.5 onto cascading, smaller solid particles of P.sub.2 S.sub.5. The process can be used to produce any reactivity grade of P.sub.2 S.sub.5 by adjusting processing conditions. The process can also be used to produce P.sub.2 S.sub.5 in a form suitable for bulk shipping.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: April 9, 1996
    Inventors: Jean M. Bacardi, Robert L. Camerer, Andrew M. Huey, Arthur R. Shirley, Jr.
  • Patent number: 5431832
    Abstract: A siloxane-based lubricant composition contains a mixture of nonreactive and reactive polydimethylsiloxanes, crosslinker and sufficient amounts of surfactant and water to provide an emulsion. The composition contains no methyl hydrogen silane, dimethyl hydrogen silane and/or polymethyl hydrogen siloxane and therefore releases no hydrogen gas during storage or during use.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: July 11, 1995
    Inventors: Angela M. Crowe, David M. Freedman, Joyce A. Rodriguez, Joseph J. Fanelli
  • Patent number: 5370892
    Abstract: A nondigestible fat which comprises a liquid nondigestible oil having a complete melting point below about 37.degree. C. and a sufficient amount of a hydrophobic silica to control passive oil loss of the liquid nondigestible oil is disclosed. This nondigestible fat is useful in the formulation of reduced calorie fat compositions useful as frying fats for obtaining reduced calorie foods, e.g. potato chips, french fries and other fat-containing foods. These fat compositions can also be used to provide reduced calorie cooking and salad oils that are clear at room temperature.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: December 6, 1994
    Assignee: The Procter & Gamble Company
    Inventors: Magda El-Nokaly, Raymond L. Niehoff
  • Patent number: 5292501
    Abstract: The present invention relates to compositions and methods for inhibiting plaque. In particular, this invention relates to oral compositions comprising: (a) a safe and effective amount of a carboxy-substituted polymer active agent having the formula ##STR1## or the salts thereof, wherein R is a C.sub.1 -C.sub.8 alkyl group, n is in the range of from 0 to about 2,000, m is in the range of from about 10 to about 2,000, and p is in the range of from about 1 to about 10; and (b) a pharmaceutically acceptable carrier. These compositions inhibit plaque without staining the tooth surfaces which are contacted with the composition.This invention also relates to a method of inhibiting plaque on tooth surfaces in the oral cavity. This method involves applying a safe and effective amount of the carboxy-substituted polymer active agent to the oral cavity. Such an application is typically made by applying the above-described oral compositions containing the carboxy-substituted polymer to the tooth surface.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: March 8, 1994
    Inventors: Charles R. Degenhardt, Barbara A. Kozikowski
  • Patent number: 5221711
    Abstract: Amino-functional compounds are economically prepared by reacting maleic anhydride with alcohols to form a maleate or fumarate "half-ester" which is combined with certain amines, most preferably aspartate or glutamate, under conditions selected to avoid hydrolysis. At low molecular weights, the compounds herein are useful detergency builders; at progressively higher molecular weights within a specific range, combined builder/dispersant and typical dispersant properties emerge. Processes for preparing the compounds and useful detergent compositions containing them are described.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: June 22, 1993
    Assignee: The Procter & Gamble Company
    Inventors: Stephen W. Heinzman, Michael J. Eis, Molly P. Armstrong
  • Patent number: 5213789
    Abstract: The present invention relates to compositions and methods for inhibiting plaque. In particular, this invention relates to oral compositions comprising: (a) a safe and effective amount of a carboxy-containing copolymer having the formula ##STR1## or the salts thereof, wherein n is in the range of from about 200 to about 14,000, m is in the range of from about 2 to about 5,000, and p is in the range of from 1 to 3; and (b) a pharmaceutically acceptable carrier. These compositions inhibit plaque without staining the teeth which are contacted with the composition.This invention also relates to a method of inhibiting plaque on tooth surfaces in the oral cavity. This method involves applying a safe and effective amount of the carboxy-containing copolymer active agent to the oral cavity. Such an application is typically made by applying the above-described oral compositions containing the carboxy-containing copolymer to the oral cavity. The application does not stain the teeth on which it is made.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: May 25, 1993
    Assignee: The Procter & Gamble Company
    Inventors: Charles R. Degenhardt, Barbara A. Kozikowski