Patents by Inventor Donald Jeffrey Keyser

Donald Jeffrey Keyser 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: 20150004235
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 1, 2015
    Inventors: Donald Jeffrey KEYSER, Alvaro F. Guillem
  • Publication number: 20140377359
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: July 1, 2014
    Publication date: December 25, 2014
    Inventors: Donald Jeffrey KEYSER, Alvaro F. Guillem
  • Publication number: 20140377560
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: July 1, 2014
    Publication date: December 25, 2014
    Inventors: Donald Jeffrey KEYSER, Alvaro F. Guillem
  • Publication number: 20140342017
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: August 1, 2014
    Publication date: November 20, 2014
    Inventors: Donald Jeffrey KEYSER, Alvaro F. Guillem
  • Patent number: 8877255
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of ZS-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: November 4, 2014
    Assignee: ZS Pharma, Inc.
    Inventors: Donald Jeffrey Keyser, Alvaro F. Guillem
  • Publication number: 20140302175
    Abstract: The present invention relates to novel methods of using microporous zirconium silicate to reduce the risk of hyperkalemia and to lower aldosterone levels in the treatment of chronic kidney disease and/or chronic heart disease with therapies comprising diuretics. The invention provides a safe way to reduce the risk of hyperkalemia and to lower aldosterone. The invention also relates to treatment of other conditions that can occur either alone or in connection with hyperkalemia, chronic kidney disease, and/or chronic heart disease.
    Type: Application
    Filed: April 3, 2014
    Publication date: October 9, 2014
    Applicant: ZS Pharma, Inc.
    Inventors: Donald Jeffrey KEYSER, Alvaro F. GUILLEM
  • Publication number: 20140287060
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: March 26, 2014
    Publication date: September 25, 2014
    Inventors: Donald Jeffrey KEYSER, Alvaro F. Guillem, Jeff Gilmore
  • Patent number: 8808750
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: August 19, 2014
    Assignee: ZS Pharma, Inc.
    Inventors: Donald Jeffrey Keyser, Alvaro F. Guillem
  • Patent number: 8802152
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: August 12, 2014
    Assignee: ZS Pharma, Inc.
    Inventors: Donald Jeffrey Keyser, Alvaro F. Guillem
  • Publication number: 20140113002
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of ZS-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: October 22, 2013
    Publication date: April 24, 2014
    Applicant: ZS Pharma, Inc.
    Inventors: Donald Jeffrey KEYSER, Alvaro F. GUILLEM
  • Publication number: 20140105971
    Abstract: The present invention relates to novel calcium-containing microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without removing calcium from the patient's body. Also disclosed are methods of using calcium-free or low calcium microporous zirconium silicate compositions for the treatment of hyperkalemia in patients also suffering from hypercalcemia.
    Type: Application
    Filed: July 11, 2013
    Publication date: April 17, 2014
    Inventors: Donald Jeffrey KEYSER, Alvaro F. GUILLEM
  • Publication number: 20140044785
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: September 25, 2013
    Publication date: February 13, 2014
    Applicant: ZS Pharma, Inc.
    Inventors: Donald Jeffrey KEYSER, Alvaro F. GUILLEM
  • Publication number: 20120213847
    Abstract: The present invention relates to novel microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without causing undesirable side effects. The preferred formulations are designed avoid increase in pH of urine in patients and/or avoid potential entry of particles into the bloodstream of the patient. Also disclosed is a method for preparing high purity crystals of UZSi-9 exhibiting an enhanced level of potassium exchange capacity. These compositions are particularly useful in the therapeutic treatment of hyperkalemia.
    Type: Application
    Filed: February 10, 2012
    Publication date: August 23, 2012
    Applicant: ZS Pharma, Inc.
    Inventors: Donald Jeffrey Keyser, Alavaro F. Guillem
  • Patent number: 8012504
    Abstract: The invention relates to a novel pharmaceutical modified release formulation of guaifenesin and dextromethorphan. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin, wherein one or both portions further comprises dextromethorphan.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: September 6, 2011
    Assignee: Reckitt Benckiser Inc.
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser
  • Patent number: 7985421
    Abstract: The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin and at least one additional drug ingredient. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin, wherein one or both portions has at least one additional drug ingredient.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: July 26, 2011
    Assignee: Reckitt Benckiser Inc.
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser
  • Patent number: 7985420
    Abstract: The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin and pseudoephedrine. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin, wherein one or both portions further comprises pseudoephedrine.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: July 26, 2011
    Assignee: Reckitt Benckiser Inc.
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser
  • Publication number: 20110052689
    Abstract: The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1: 1) to about nine-to-one (9: 1), more preferably a range of about three-to-two (3:2) to about six-to-one (6: 1), and most preferably in a range of about two-to-one (2: 1) to about four-to-one (4: 1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin.
    Type: Application
    Filed: November 5, 2010
    Publication date: March 3, 2011
    Applicant: RECKITT BENCKISER INC.
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser
  • Patent number: 7838032
    Abstract: The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: November 23, 2010
    Assignee: Reckitt Benckiser Inc.
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser
  • Patent number: 6955821
    Abstract: The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin and at least one additional drug ingredient. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin, wherein one or both portions has at least one additional drug ingredient.
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: October 18, 2005
    Assignee: Adams Laboratories, Inc.
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser
  • Publication number: 20040022851
    Abstract: The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin and pseudoephedrine. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin, wherein one or both portions further comprises pseudoephedrine.
    Type: Application
    Filed: April 4, 2003
    Publication date: February 5, 2004
    Inventors: Robert D. Davis, Ralph W. Blume, Donald Jeffrey Keyser