Patents by Inventor Roger Jeffcoat

Roger Jeffcoat 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: 5720822
    Abstract: Thermally-inhibited, pregelatinized non-granular starches and flours are prepared by pregelatinizing the starch or flour and thermally inhibiting the starch or flour by dehydrating the starch or flour to anhydrous or substantially anhydrous and then heat treating the dehydrated starch. The pregelatinization may be carried out prior to or after the thermal inhibition using known methods which disrupt the granular structure such by drum drying or jet cooking and spray-drying. Preferably the starch or flour is adjusted to a pH above 7.0 prior to the thermal inhibition. The starch may be dehydrated by heating the starch in a suitable heating apparatus, by extracting the water from the starch using a solvent such as ethanol, or by freeze drying the starch. Preferably the starch or flour is treated with a solvent to remove proteins and/or lipids and thus prevent off flavors.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 24, 1998
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Roger Jeffcoat, Chung-Wai Chiu, Manish B. Shah, David J. Thomas, Douglas J. Hanchett
  • Patent number: 5718770
    Abstract: Pregelatinized granular starches and flours are thermally inhibited by dehydrating a starch to anhydrous or substantially anhydrous and then heat treating the dehydrated starch at a temperature and for a time sufficient to inhibit the starch. The starch may be pregelatinized prior to or after the thermal inhibition using methods known in the art which retain the granular integrity. Preferably, the pH of the starch or flour is raised to 7.0 or above prior to the thermal inhibition steps. The dehydration step may be carried out by directly heating the starch, by extracting the starch with a solvent, or by freeze drying the starch. Preferably protein and/or lipids are removed prior to or after the thermal inhibition.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: February 17, 1998
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Manish B. Shah, David J. Thomas, Chung-Wai Chiu, Roger Jeffcoat, Douglas J. Hanchett
  • Patent number: 5700917
    Abstract: Aldehyde cationic derivatives of galactose containing polysaccharides which are obtained by oxidizing galactose containing polysaccharides with the enzyme galactose oxidase. The enzyme oxidized products have an aldehyde function at a specific position of the polysaccharide, i.e., the C.sub.6 position, of the galactose unit, and the cationic derivatives thereof have unexpected and significantly improved properties when used as paper strength additives.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: December 23, 1997
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Chung-Wai Chiu, Roger Jeffcoat, Matthew Henley, Leroy Peek
  • Patent number: 5643627
    Abstract: A non-gelling starch having good freeze-thaw stability and good mouthfeel making it suitable for use as a food additive is provided by selected waxy starch which has greater than 30% by weight of short chains with a DP of less than 13 and has been converted to a WF of from about 10 to 80, preferably 20 to 45. Particularly useful waxy starches are a hybrid waxy starch from a plant of wxsu2 genotype, waxy rice, waxy barley and amaranth.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: July 1, 1997
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: David P. Huang, Roger Jeffcoat, William R. Mason
  • Patent number: 5554745
    Abstract: Aldehyde cationic derivatives of galactose containing polysaccharides which are obtained by oxidizing galactose containing polysaccharides with the enzyme galactose oxidase. The enzyme oxidized products have an aldehyde function at a specific position of the polysaccharide, i.e., the C.sub.6 position, of the galactose unit, and the cationic derivatives thereof have unexpected and significantly improved properties when used as paper strength additives.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: September 10, 1996
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Chung-Wai Chiu, Roger Jeffcoat, Matthew Henley, Leroy Peek
  • Patent number: 5518717
    Abstract: This invention relates to hair fixing compositions containing a natural based hydrolyzed zein fixative which has a selected molecular weight, the composition having low volatile organic compound (VOC) content.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: May 21, 1996
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Natalie Morawsky, Gary T. Martino, Jacob Guth, John Tsai, Roger Jeffcoat
  • Patent number: 5405437
    Abstract: An all natural, starch-based, alkaline corrugating adhesive free of formaldehyde and other crosslinking and water resistance additives and having good water resistant properties comprising an aqueous dispersion of a gelatinized carrier starch and a raw ungelatinized starch wherein the carrier starch has a total amylose content of greater than 60% by weight and the gelatinized starch amylose content is at least about 15% by weight of the total starch content in the adhesive.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: April 11, 1995
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Craig H. Leake, Michael T. Foran, Roger Jeffcoat, Michael T. Philbin, John E. Fannon
  • Patent number: 5300145
    Abstract: This invention provides a starch derived from a single plant source, comprising less than 10%, optionally less than 5%, amylopectin. The starch additionally comprises at least 75% amylose, optionally at least 85% amylose, measured by butanol fractionation/exclusion chromatography measurement. In another aspect of this invention, the starch is extracted in substantially pure form from a starch bearing plant having a recessive amylose extender genotype that is associated with amylose extender modifying genes. The starch bearing plant from which the starch is extracted is preferably a maize plant.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: April 5, 1994
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Virgil Fergason, Roger Jeffcoat, John E. Fannon, Teresa Capitani
  • Patent number: 4965201
    Abstract: The invention provides a process for preparing medium chain dicarboxylic acids by biochemical oxidation so that in particular C.sub.8 and C.sub.10 dicarboxylic acids are prepared from nontoxic levels of C.sub.8 -C.sub.14 fatty acids using a nitrogen-restricted yeast propagated in a carbon substrate containing growth medium. Preferably the fatty material is supplied to the yeast in the form of a glyceride. Also it is preferred that the amount of nitrogen in the biomass is between 4 and 9%, in particular between 5.5 and 7% (w/w).
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: October 23, 1990
    Inventors: John Casey, Roy T. Dobb, Roger Jeffcoat