Patents by Inventor Juan L. Navia

Juan L. Navia 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: 6423358
    Abstract: The invention relates to a low calorie, palatable fiber-containing, table sugar substitute containing inulin and a high intensity sweetener, where the inulin and high intensity sweetener are present in a proportion such that, on a volume:volume basis the table sugar substitute provides approximately the same sweetness as sucrose.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: July 23, 2002
    Assignee: McNeil-PPC, Inc.
    Inventors: Richard L. Barndt, Shyhyuan Liao, Carolyn M. Merkel, William J. Chapello, Juan L. Navia
  • Publication number: 20010055793
    Abstract: The present invention relates to a process of preparing commercial quantities of glucose and/or fructose from sucrose, a process of preparing commercial quantities of glucose and a polyfructan from sucrose, a reactor for practicing same, a process of preparing commercial quantities of fructose and a polyglucan from sucrose and a reactor for practicing same.
    Type: Application
    Filed: June 5, 2001
    Publication date: December 27, 2001
    Applicant: MAGNOLIA NUTRITIONALS, L.L.C.
    Inventors: Steven J. Catani, Stephen A. Roth, Edward J. McGuire, Juan L. Navia
  • Patent number: 6242225
    Abstract: The present invention relates to a process of preparing commercial quantities of glucose and/or fructose from sucrose, a process of preparing commercial quantities of glucose and a polyfructan from sucrose, a reactor for practicing same, a process of preparing commercial quantities of fructose and a polyglucan from sucrose and a reactor for practicing same.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: June 5, 2001
    Assignee: Magnolia Nutritionals, L.L.C.
    Inventors: Steven J. Catani, Stephen A. Roth, Edward J. McGuire, Juan L. Navia
  • Patent number: 5998177
    Abstract: The present invention relates to a process of preparing commercial quantities of glucose from sucrose, a process of preparing commercial quantities of glucose and a branched fructan from sucrose, a reactor for practicing same.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: December 7, 1999
    Assignee: Neose Technologies, Inc.
    Inventors: Steven J. Catani, Stephen A. Roth, Edward J. McGuire, Juan L. Navia
  • 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: 5952205
    Abstract: The present invention relates to a process of preparing commercial quantities of glucose and/or fructose from sucrose, a process of preparing commercial quantities of glucose and a polyfructan from sucrose, a reactor for practicing same, a process of preparing commercial quantities of fructose and a polyglucan from sucrose and a reactor for practicing same.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: September 14, 1999
    Assignee: Neose Technologies, Inc.
    Inventors: Steven J. Catani, Stephen A. Roth, Edward J. McGuire, Juan L. Navia
  • Patent number: 5530106
    Abstract: There is disclosed a process for recovering sucralose-6-ester from a feed mixture of 6-O-acyl-4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose in a reaction medium comprising a tertiary amide (such as N,N-dimethylformamide), wherein said process comprises removing a major proportion of said tertiary amide by steam distillation. In preferred aspects of the invention, the steam distillation is followed by extraction and then purification by crystallization or crystal aging to recover sucralose-6-ester in good yield.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: June 25, 1996
    Assignee: McNeil-PPC, Inc.
    Inventors: Juan L. Navia, Robert E. Walkup, David S. Neiditch
  • Patent number: 5498709
    Abstract: There is disclosed a process for producing sucralose from sucralose-6-ester whereby the sucralose-6-ester is deacylated directly either prior to or after removal of the tertiary amide reaction vehicle from the neutralized chlorination reaction mixture, to produce an aqueous solution of sucralose plus salts and impurities, from which sucralose is recovered by extraction and is then preferably purified by crystallization.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: March 12, 1996
    Assignee: McNeil-PPC, Inc.
    Inventors: Juan L. Navia, Robert E. Walkup, Nicholas M. Vernon, David S. Neiditch
  • Patent number: 5298611
    Abstract: A process for producing substantially pure sucralose pentaester from a mixture of 6-O-acyl-4,1' ,6' -trichloro-4,1',6'-trideoxygalactosucrose in a reaction medium comprising a tertiary amide, wherein said process comprises the steps of:(a) recovering the 6-O-acyl-4,1' ,6' -trichloro-4,1' ,6' -trideoxygalactosucrose from said mixture;(b) peracylating the 6-O-acyl-4,1' ,6' -trichloro-4,1' ,6' -trideoxygalactosucrose product of step (a) to produce thereby 4,1',6' -trichloro-4,1' ,6' -trideoxygalactosucrose pentaester; and(c) crystallizing the 4,1',6' -trichloro-4,1' ,6' -trideoxygalactosucrose pentaester product of step (b) to produce substantially pure 4,1',6' -trichloro-4,1' ,6' -trideoxygalactosucrose pentaester.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: March 29, 1994
    Assignee: McNeil-PPC, Inc.
    Inventors: Juan L. Navia, Robert E. Walkup, Nicholas M. Vernon, Robert E. Wingard, Jr.
  • Patent number: 4980463
    Abstract: A process for the chlorination of sucrose-6-esters to produce 6',4,1'-trichlorosucrose-6-esters which comprises the steps of:(a) adding at least seven molar equivalents of an acid chloride to a reaction mixture containing a sucrose-6-ester and a tertiary amide to form initially a chloroformiminium chloride salt which subsequently forms a complex with the hydroxyl groups of the sucrose-6-ester;(b) subjecting the reaction mixture product of step (a) to an elevated temperature not higher than about 85.degree. C. for a period of time sufficient to produce a mixture of chlorinated sucrose-6-ester products consisting essentially of 6'-chlorosucrose-6-ester, 4,6'-dichlorosucrose-6-ester, and 1',6'-dichlorosucrose-6-ester; and(c) subjecting the reaction mixture product of step (b) to an elevated temperature not higher than about 125.degree. C. for a period of time sufficient to produce a chlorinated product consisting essentially of 1',4,6'-trichlorosucrose-6-ester.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: December 25, 1990
    Assignee: Noramco, Inc.
    Inventors: Robert E. Walkup, Juan L. Navia, Nicholas M. Vernon
  • Patent number: 4950746
    Abstract: Sucrose is reacted with a 1,3-di(hydrocarbyloxy)-1,1,3,3-tetra(hydrocarbyl)distannoxane to produce a 1,3-di-(6-O-sucrose)-1,1,3,3-tetra(hydrocarbyl)distannoxane, which can be acylated to produce a sucross-6-ester.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: August 21, 1990
    Assignee: Noramco, Inc.
    Inventor: Juan L. Navia