Patents by Inventor Pradeep K. Dhal

Pradeep K. Dhal 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: 20090155368
    Abstract: The present invention relates to crosslinked polyamine particles and/or pharmaceutical compositions comprising, at least in part, crosslinked polyamine particles and aggregates of such particles (including cured aggregates of crosslinked polyamine particles). The compositions may be in the form of tablets comprising, for example, particles larger than 500 ?m, and used for treating patients, for example, patients with hyperphosphatemia.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 18, 2009
    Applicant: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, David J. Harris, Steven C. Polomoscanik, Adnan Salameh, Bruce Shutts, Richard Silva, Pradeep K. Dhal, Lynne Sole
  • Publication number: 20090047233
    Abstract: Polymers and compositions utilizing such polymers are disclosed for treating hyperphosphatemia and other illnesses associated with elevated serum phosphate levels. Phosphate binding polymers, or a pharmaceutically acceptable salt of the polymers, comprise pendent groups extending from a backbone of the polymer. Each pendent group comprises at least two nitrogen-bearing functional groups which bind phosphate. Variations of such polymer and compositions are disclosed.
    Type: Application
    Filed: August 25, 2006
    Publication date: February 19, 2009
    Inventors: Chad C. Huval, Stephen Randall Holmes-Farley, Pradeep K. Dhal
  • Patent number: 7456156
    Abstract: Disclosed is a phenyl boronic acid compound represented by Structural Formula (I): Ar is a substituted or unsubstituted aryl group. Z and Z? are independently —O—, —NH— or —S—. X is an electron withdrawing group. R is a substituted or unsubstituted straight chained hydrocarbyl group optionally comprising one or more amine, ammonium, ether, thioether or phenylene linking groups and Y is —H, an amine, —[NH—(CH2)q]r—NH2, halogen, —CF3, thiol, ammonium, alcohol, —COOH, —SO3H, —OSO3H or phosphonium group covalently bonded to the terminal position of R. Each —NH— in —[NH—(CH2)q]r—NH2 is optionally N-alkylated or N,N-dialkylated and —NH2 in —[NH—CH2)q]r—NH2 is optionally N-alkylated, N,N-dialkylated or N,N,N-trialkylated. q is an integer from 2 to about 10 and r is an integer from 1 to about 5.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: November 25, 2008
    Assignee: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, Harry W. Mandeville, III, Pradeep K. Dhal, Chad Cori Huval, Xinhua Li
  • Patent number: 7125547
    Abstract: The present invention relates to a method for removing bile acids from a patient and certain polymers of use in the method. The method comprises the step of administering to the patient a therapeutically effective amount of a polymer composition which includes a a poly(diallylamine) polymer which is substituted with hydrophobic groups. The hydrophobic groups can be a substituted or unsubstituted, straight chain or branched C3–C24-alkyl group, an aralkyl group or an aryl group.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: October 24, 2006
    Assignee: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, Pradeep K. Dhal, John S. Petersen
  • Patent number: 7049304
    Abstract: Disclosed is a phenyl boronic acid compound represented by Structural Formula (I): Ar is a substituted or unsubstituted aryl group. Z and Z? are independently —O—. —NH— or —S—. X is an electron withdrawing group. R is a substituted or unsubstituted straight chained hydrocarbyl group optionally comprising one or more amine, ammonium, ether, thioether or phenylene linking groups and Y is —H, an amine, —[NH—(CH2)q]r—NH2, halogen, —CF3, thiol, ammonium, alcohol, —COOH, —SO3H, —OSO3H or phosphonium group covalently bonded to the terminal position of R. Each —NH— in —[NH—(CH2)q]r—NH2 is optionally N-alkylated or N,N-dialkylated and —NH2 in —[NH—(CH2)q]r—NH2 is optionally N-alkylated, N,N-dialkylated or N,N,N-trialkylated. q is an integer from 2 to about 10 and r is an integer from 1 to about 5.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: May 23, 2006
    Assignee: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, W. Harry Mandeville, III, Pradeep K. Dhal, Chad Cori Huval, Xinhua Li
  • Patent number: 7041280
    Abstract: Disclosed are polymers comprising one or more phenyl boronate ester, boronamide or boronate thioester groups. The phenyl boronate ester, boronamide and boronate thioester groups are represented by one of the following structural formulas: Ar in Structural Formulas (I) and (II) is substituted or unsubstituted; and each Z is —O—, —NH— or —S— and is independently selected. Pharmaceutically acceptable salts of the polymer are also included. The aryl boronate ester, boronamide or boronate thioester can be cleaved to release the corresponding aryl boronic acid. Also disclosed are pharmaceutical compositions comprising the polymers of the present invention and a pharmaceutically acceptable carrier or diluent; and methods of treating a subject for obesity with the polymers of the present invention.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: May 9, 2006
    Assignee: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, W. Harry Mandeville, III, Pradeep K. Dhal, Chad Cori Huval, Xinhua Li, Steven Craig Polomoscanik
  • Patent number: 6858592
    Abstract: Disclosed is a phenyl boronic acid compound represented by Structural Formula (I): Ar is a substituted or unsubstituted aryl group. Z and Z? are independently —O—. —NH— or —S—. X is an electron withdrawing group. R is a substituted or unsubstituted straight chained hydrocarbyl group optionally comprising one or more amine, ammonium, ether, thioether or phenylene linking groups and Y is —H, an amine, —[NH—(CH2)q]r—NH2, halogen, —CF3, thiol ammonium, alcohol, —COOH, —SO3H, —OSO3H or phosphonium group covalently bonded to the terminal position of R. Each —NH— in —[NH—(CH2)q]r—NH2 is optionally N-alkylated or N,N-dialkylated and —NH2 in —[NH—(CH2)q]r—NH2 is optionally N-alkylated, N,N-dialkylated or N,N,N-trialkylated. q is an integer from 2 to about 10 and r is an integer from 1 to about 5.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: February 22, 2005
    Assignee: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, W. Harry Mandeville, III, Pradeep K. Dhal, Chad Cori Huval, Xinhua Li
  • Publication number: 20040151687
    Abstract: The present invention relates to a method for removing bile acids from a patient and certain polymers of use in the method. The method comprises the step of administering to the patient a therapeutically effective amount of a polymer composition which includes a a poly(diallylamine) polymer which is substituted with hydrophobic groups. The hydrophobic groups can be a substituted or unsubstituted, straight chain or branched C3-C24-alkyl group, an aralkyl group or an aryl group.
    Type: Application
    Filed: August 25, 2003
    Publication date: August 5, 2004
    Applicant: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, Pradeep K. Dhal, John S. Petersen
  • Patent number: 6610283
    Abstract: The present invention relates to a method for removing bile acids from a patient and certain polymers of use in the method. The method comprises the step of administering to the patient a therapeutically effective amount of a polymer composition which includes a a poly(diallylamine) polymer which is substituted with hydrophobic groups. The hydrophobic groups can be a substituted or unsubstituted, straight chain or branched C3-C24-alkyl group, an aralkyl group or an aryl group.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: August 26, 2003
    Assignee: Genzyme Corporation
    Inventors: Stephen Randall Holmes-Farley, Pradeep K. Dhal, John S. Petersen
  • Publication number: 20030157414
    Abstract: A holographic recording medium showing little or no shrinkage after exposure comprises an acid generator capable of producing an acid upon exposure to actinic radiation; a binder; a difunctional epoxide monomer or oligomer; and a polyfunctional (i.e., tri- or higher functional) epoxide monomer or oligomer, the difunctional and polyfunctional epoxide monomers or oligomers being capable of undergoing cationic polymerization initiated by the acid produced from the acid generator. The medium is especially useful for holographic data storage applications.
    Type: Application
    Filed: November 13, 1997
    Publication date: August 21, 2003
    Inventors: PRADEEP K. DHAL, RICHARD T. INGWALL, ERIC S. KOLB, HSIN YU LI, DAVID A. WALDMAN
  • Patent number: 6565895
    Abstract: The invention relates to the unexpected discovery that bismuth-containing compounds are effective in the treatment of oral mucositis in a mammal. Thus, the invention relates, in one aspect to a method of treating oral mucositis comprising administering an effective amount of a pharmaceutically acceptable bismuth-containing compound, such as a bismuth salt or bismuth complex. In a preferred embodiment, the bismuth compound is an organic or inorganic salt such as, bismuth subsalicylate, bismuth subgallate, bismuth aluminate, bismuth citrate, bismuth subcitrate, bismuth carbonate, bismuth subcarbonate, tripotassium dicitrato bismuthate, bismuth nitrate, bismuth subnitrate, bismuth tartrate and mixtures thereof, preferably, bismuth subsalicylate and bismuth subgallate.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: May 20, 2003
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: Philip J. Goddard, Jeffrey D. Klinger, Pradeep K. Dhal, W. Harry Mandeville, III, Richard J. Fitzpatrick, Thomas X. Neenan
  • Publication number: 20030064963
    Abstract: Disclosed is a phenyl boronic acid compound represented by Structural Formula (I): 1
    Type: Application
    Filed: June 27, 2002
    Publication date: April 3, 2003
    Applicant: GelTex Pharmaceuticals, Inc.
    Inventors: Stephen Randall Holmes-Farley, W. Harry Mandeville, Pradeep K. Dhal, Chad Cori Huval, Xinhua Li
  • Publication number: 20030059399
    Abstract: Disclosed are polymers comprising one or more phenyl boronate ester, boronamide or boronate thioester groups.
    Type: Application
    Filed: June 27, 2002
    Publication date: March 27, 2003
    Applicant: GelTex Pharmaceuticals, Inc.
    Inventors: Stephen Randall Holmes-Farley, W. Harry Mandeville, Pradeep K. Dhal, Chad Cori Huval, Xinhua Li, Steven Craig Polomoscanik
  • Patent number: 6489065
    Abstract: A holographic recording medium comprises (a) an acid generator capable of generating an acid upon exposure to actinic radiation; and (b) a polymer comprising a plurality of high refractive index moieties, a plurality of low refractive index moieties, and a plurality of acid-sensitive linking groups connecting the high and low refractive index moieties. When an interference pattern is formed within this medium, in the light areas of this interference pattern acid is generated by the acid generator and cleaves the acid-sensitive linking groups, thereby causing separation of either the high or the low refractive index moieties from the polymer, and formation of a hologram within the medium.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: December 3, 2002
    Assignee: Polaroid Corporation
    Inventors: Pradeep K. Dhal, Eric S. Kolb, Richard A. Minns
  • Publication number: 20020155091
    Abstract: The invention relates to methods for treating hypercholesterolemia and atherosclerosis, and reducing serum cholesterol in a mammal. The methods of the invention comprise administering to a mammal a first amount of a bile acid sequestrant compound which is an unsubstituted polydiallylamine polymer and a second amount of a cholesterol-lowering agent. The first and second amounts together comprise a therapeutically effective amount.
    Type: Application
    Filed: December 19, 2001
    Publication date: October 24, 2002
    Applicant: GelTex Pharmaceuticals, Inc.
    Inventors: Chad Cori Huval, Stephen Randall Holmes-Farley, John S. Petersen, Pradeep K. Dhal
  • Patent number: 6365186
    Abstract: The invention relates to methods for treating hypercholesterolemia and atherosclerosis, and reducing serum cholesterol in a mammal. The methods of the invention comprise administering to a mammal a first amount of a bile acid sequestrant compound which is an unsubstituted polydiallylamine polymer and a second amount of a cholesterol-lowering agent. The first and second amounts together comprise a therapeutically effective amount. The invention further relates to pharmaceutical compositions useful for the treatment of hypercholesterolemia and atherosclerosis, and for reducing serum cholesterol. The pharmaceutical compositions comprise a combination of a first amount of an unsubstituted polydiallylamine polymer compound and a second amount of a cholesterol-lowering agent. The first and second amounts comprise a therapeutically effective amount. The pharmaceutical compositions of the present invention may optionally contain a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: April 2, 2002
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: Chad Cori Huval, Stephen Randall Holmes-Farley, John S. Petersen, Pradeep K. Dhal
  • Patent number: 6294163
    Abstract: The present invention relates to a method for sequestering bile acids in a patient and to particular polymers for use in the method. The method comprises administering a therapeutically effective amount of a guanidinium moiety-containing polymer composition to a mammal, such as a human, whereby bile acids are sequestered. The polymers of the invention comprise guanidinium moieties and optionally, additional substituents such as a hydrophobic group, a quaternary ammonium-containing group or a combination thereof.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: September 25, 2001
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: Pradeep K. Dhal, Stephen R. Holmes-Farley, John S. Petersen
  • Patent number: 6271264
    Abstract: The present invention relates to a method for sequestering bile acids in a patient and to particular polymers for use in the method. The method comprises administering a therapeutically effective amount of a spirobicyclic ammonium moiety-containing polymer composition to a mammal, such as a human, whereby bile acids are sequestered. The polymers of the invention comprise spirobicyclic ammonium moieties and optionally, further comprise a hydrophobic substituent, a quaternary ammonium-containing substituent or a combination thereof.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: August 7, 2001
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: Pradeep K. Dhal, Steven C. Polomoscanik
  • Patent number: 6264938
    Abstract: The invention relates to methods for treating hypercholesterolemia and atherosclerosis, and reducing serum cholesterol in a mammal. The methods of the invention comprise administering to a mammal a first amount of a bile acid sequestrant compound which is an unsubstituted polydiallylamine polymer and a second amount of an HMG Co-A reductase inhibitor compound. The first and second amounts together comprise a therapeutically effective amount. The invention further relates to pharmaceutical compositions useful for the treatment of hypercholesterolemia and atherosclerosis, and for reducing serum cholesterol. The pharmaceutical compositions comprise a combination of a first amount of an unsubstituted polydiallylamine polymer compound and a second amount of an HMG Co-A reductase inhibitor compound. The first and second amounts comprise a therapeutically effective amount. The pharmaceutical compositions of the present invention may optionally contain a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: July 24, 2001
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: Chad Cori Huval, Stephen Randall Holmes-Farley, John S. Petersen, Pradeep K. Dhal
  • Patent number: 6248318
    Abstract: A method for treating hypercholesterolemia in a patient that includes administering to the patient a therapeutically effective amount of a polydiallylamine polymer.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: June 19, 2001
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: Chad Cori Huval, Stephen Randall Holmes-Farley, John S. Petersen, Pradeep K. Dhal