Patents by Inventor Mahendra R. Patel

Mahendra R. Patel 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: 20080146581
    Abstract: A pharmaceutical composition having improved solubility comprising a hydrophobic drug or pharmaceutically acceptable salt thereof and a compound having at least one carboxylic acid moiety, wherein the molar ratio of the compound having at least one carboxylic acid moiety to the hydrophobic drug or pharmaceutically acceptable salt thereof is from about 0.1:1 to about 25:1. The pharmaceutical composition exhibits rapid dissolution upon contact with physiological solvents, such as water, saliva or gastrointestinal fluids.
    Type: Application
    Filed: February 15, 2008
    Publication date: June 19, 2008
    Applicant: Sandoz AG
    Inventors: Gary Barbera, Chetan Chhabildas Doshi, Mahendra R. Patel, Pablo Davila, Satishkumar Ambalal Patel
  • Patent number: 7297789
    Abstract: A process for the preparation of polymorph Form I of 2-methyl-4-(4-methyl-1-piperazinyl)-10H-thieno[2,3-b][1,5] benzodiazepine, or olanzapine.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: November 20, 2007
    Assignee: Sandoz, Inc.
    Inventors: Hiren V. Patel, Anup K. Ray, Pramod B. Patel, Mahendra R. Patel
  • Patent number: 6962924
    Abstract: This invention provides a process of preparation of novel polymorphic hemifumarate salts of 8-chloro-6,11-dihyfro-11-(4-piperidylidene)-5H-benzo[5,6]-cyclohepta[1,2-b]pyridine, hereinafter called “desloratadine”. These polymorphic salt forms show much higher solubility in water and also in protic organic solvents compare to the parent desloratadine. The process of preparing the polymorphic forms comprising: a) mixing the ethanolic solution of desloratadine and fumaric acid at a temperature of from about 55° C. to 70° C., and stirring for 30 to 45 minutes after mixing, and thereafter filtering the solid thereby prepared in hot condition; to yield the polymorphic form 2 having a DSC of 232° C.±2° C.; or b) mixing the ethanolic solution of desloratadine and fumaric acid at a temperature of form about 15° C. room temperature (25° C.) and stirring at this temperature for 30 to 45 minutes, then filtering at room temperature; to yield the polymorphic form 1 having a DSC of 224° C.±2° C.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: November 8, 2005
    Assignee: Sandoz AG
    Inventors: Anup Kumar Ray, Hiren Patel, Mahendra R Patel
  • Publication number: 20040213847
    Abstract: Thus, the present invention is directed toward an oral pharmaceutical composition in a solid dosage form comprising:
    Type: Application
    Filed: April 23, 2003
    Publication date: October 28, 2004
    Inventors: Amol Singh Matharu, Mahendra R. Patel, Mohsen SadatRezaei, Chuanbin Wu
  • Publication number: 20040058949
    Abstract: This invention provides a process of preparation of novel polymorphic hemifumarate salts of 8-chloro-6,11-dihydro-11-(4-piperidylidene)-5H-benzo[5,6]-cyclohepta[1,2-b]pyridine, hereinafter called “desloratadine”. These polymorphic salt forms show much higher solubility in water and also in protic organic solvents compare to the parent desloratadine.
    Type: Application
    Filed: July 17, 2003
    Publication date: March 25, 2004
    Inventors: Anup Kumar Ray, Hiren Patel, Mahendra R. Patel
  • Publication number: 20040048854
    Abstract: A process for the preparation of polymorph Form I of 2-methyl-4-(4-methyl-1-piperazinyl)-10H-thieno[2,3-b][1,5] benzodiazepine, or olanzapine.
    Type: Application
    Filed: May 30, 2003
    Publication date: March 11, 2004
    Inventors: Hiren V. Patel, Anup K. Ray, Pramod B. Patel, Mahendra R. Patel
  • Patent number: 6693211
    Abstract: This invention provides a process for preparing sodium ferric gluconate complex in sucrose using the following steps: a) combining a ferric salt solution with a weak alkali chosen from the group consisting of alkaline earth metal and ammonium salts, such as sodium carbonate, sodium bicarbonate, lithium carbonate, potassium carbonate, potassium bicarbonate, ammonium carbonate, ammonium bicarbonate and mixtures thereof, to form the ferric oxyhydroxide; b) combining ferric oxyhydroxide and sodium gluconate in solution to yield the sodium ferric gluconate complex; c) isolating the sodium ferric gluconate complex; and d) combining the sodium ferric gluconate with sucrose in solution to yield the desired sodium ferric gluconate complex in sucrose.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: February 17, 2004
    Assignee: Geneva Pharmaceuticals, Inc.
    Inventors: Durga Kumari, Mahendra R. Patel
  • Publication number: 20030236285
    Abstract: An oral pharmaceutical composition in a solid dosage form comprising:
    Type: Application
    Filed: May 7, 2003
    Publication date: December 25, 2003
    Inventors: Mahendra R. Patel, Amol Singh Matharu, Chuanbin Wu, Ashish Anilbhai Patel
  • Publication number: 20030228363
    Abstract: Thus, the present invention is directed toward an oral pharmaceutical composition in the form of a tablet comprising:
    Type: Application
    Filed: June 7, 2002
    Publication date: December 11, 2003
    Inventors: Mahendra R. Patel, Amol Singh Matharu, Chuanbin Wu, Ashish Anilbhai Patel
  • Publication number: 20030216566
    Abstract: This invention provides a process for preparing sodium ferric gluconate complex in sucrose using the following steps:
    Type: Application
    Filed: April 28, 2003
    Publication date: November 20, 2003
    Inventors: Durga Kumari, Mahendra R. Patel
  • Publication number: 20030139606
    Abstract: A process for preparing 5-methylisoxazole-4-carboxylic-(4′-trifluoromethyl)-anilide comprising: (a) reacting ethylacetoacetate, triethylorthoformate, and acetic anhydride at a temperature of from about 75° C. to about 150° C., to form ethyl ethoxymethyleneacetoacetic ester; (b) combining the ethyl ethoxymethyleneacetoacetic ester with sodium acetate or a salt of trifluoroacetic acid in the presence of hydroxylamine sulfate at a temperature of from about −20° C. to 10° C., to form ethyl-5-methylisoxazole-4-carboxylate; (c) reacting the ethyl-5-methylisoxazole-4-carboxylate with a strong acid to form 5-methylisoxazole-4-carboxylic acid; (d) reacting the crystallized 5-methylisoxazole-4-carboxylic acid with thionyl chloride to form 5-methylisoxazole-4-carbonyl chloride; and (e) reacting the 5-methylisoxazole-4-carbonyl chloride with trifluoromethyl aniline and an amine base at a temperature of from about 0° C. to about 50° C.
    Type: Application
    Filed: November 5, 2002
    Publication date: July 24, 2003
    Inventors: Anup Kumar Ray, Hiren Kumar V. Patel, Mahendra R. Patel
  • Patent number: 6586598
    Abstract: This disclosure relates to the use of &agr;,&agr;-dibromo-&agr;-chloroacetophenone compounds as intermediates for the preparation of aromatic carbonyl compounds, especially aromatic amides. The compound 2,5-bis(2,2,2-trifluoroethoxy)-&agr;,&agr;-dibromo-&agr;-chloroacetophenone is especially useful as an intermediate for the preparation of flecainide, a known pharmaceutical.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: July 1, 2003
    Assignee: Geneva Pharmaceuticals, Inc.
    Inventors: Anup K. Ray, Hiren Patel, Shilpa V. Merai, Mahendra R. Patel
  • Publication number: 20030104050
    Abstract: A quick dissolving, high loading ribavirin composition which is essentially free of ribavirin polymorphic forms, said composition is prepared by a process comprising: (a) mixing ribavirin, at least one disintegrant and/or at least one filler to form an homogenous mixture; (b) granulating the mixture in the presence of water to form a granulation; (c) drying the granulation; and (d) mixing at least one disintegrant and/or at least one lubricant with the granulation to produce a ribavirin composition, wherein said ribavirin composition comprises at least 80 weight percent of ribavirin, based on the total weight of the composition. The ribavirin compositions prepared by the wet granulation process of the invention are free flowing and have adequate bulk density for processing into capsules. In addition, the ribavirin compositions contain at least 80 weight percent of ribavirin. Furthermore, the ribavirin compositions are substantially free of polymorphic forms of ribavirin, i.e.
    Type: Application
    Filed: October 31, 2002
    Publication date: June 5, 2003
    Inventors: Amol Singh Matharu, Mahendra R. Patel
  • Publication number: 20030021841
    Abstract: The present invention relates to a process for preparing tablet dosage forms of poorly-compressible pharmaceutical agents and to tablet dosage forms prepared according to the inventive process. The inventive process is especially useful for preparing tablets of the poorly-compressible drug metformin HCl.
    Type: Application
    Filed: June 27, 2002
    Publication date: January 30, 2003
    Inventors: Amol Singh Matharu, Mahendra R. Patel
  • Publication number: 20020188130
    Abstract: This disclosure relates to the use of &agr;,&agr;-dibromo-&agr;-chloroacetophenone compounds as intermediates for the preparation of aromatic carbonyl compounds, especially aromatic amides. The compound 2,5-bis(2,2,2-trifluoroethoxy)-&agr;,&agr;-dibromo-&agr;-chloro-acetophenone is especially useful as an intermediate for the preparation of flecainide, a known pharmaceutical.
    Type: Application
    Filed: May 8, 2002
    Publication date: December 12, 2002
    Inventors: Anup K. Ray, Hiren Patel, Shilpa V. Merai, Mahendra R. Patel
  • Patent number: 6458957
    Abstract: This disclosure relates to the use of &agr;,&agr;-dibromo-&agr;-chloroacetophenone compounds as intermediates for the preparation of aromatic carbonyl compounds, especially aromatic amides. The compound 2,5-bis(2,2,2-trifluoroethoxy)-&agr;,&agr;-dibromo-&agr;-chloroacetophenone is especially useful as an intermediate for the preparation of flecainide, a known pharmaceutical.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: October 1, 2002
    Assignee: Geneva Pharmaceuticals, Inc.
    Inventors: Anup K. Ray, Hiren Patel, Shilpa V. Merai, Mahendra R. Patel
  • Patent number: 6201153
    Abstract: Midodrine hydrochloride, ±1-(2′,5′-dimethoxyphenyl)-2-glycineamido-ethanol-(1)-HCl, is prepared from a novel intermediate, 1-(2′,5′-dimethoxyphenyl)-2-azidoethanone.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: March 13, 2001
    Assignee: Geneva Pharmaceuticals Inc.
    Inventors: Anup K. Ray, Hiren Patel, Mahendra R. Patel
  • Patent number: 5756124
    Abstract: A solid pharmaceutical tablet having a predetermined dosage that can be divided into a plurality of sub-dosage units by applying a minimal amount of force to the tablet. The tablet comprises a solid body having a top surface, a bottom surface, an outer surface, and an inner surface. The inner surface defines an aperture having a shape corresponding to the shape of the tablet. The area of the aperture is at least 15% of the area of the tablet. Impressed within the top surface of the tablet are a first plurality of symmetrical score lines and impressed within the bottom surface of the tablet are a second plurality of symmetrical score lines. The score lines extend from the aperture to the outer surface of the tablet. Finally, each of the sub-dosage units has a dosage that is a fraction of the predetermined dosage of the tablet.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: May 26, 1998
    Assignee: Invamed, Inc.
    Inventors: Mahendra R. Patel, Rajendra Patel
  • Patent number: 5587377
    Abstract: The present invention relates to the discovery of novel polymorph form of an active pharmaceutical agent and the process for its preparation. More specifically, the present invention relates to the preparation of a novel polymorph form of terazosin hydrochloride, a well known anti-hypertensive agent.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: December 24, 1996
    Assignee: Invamed, Inc.
    Inventors: Mahendra R. Patel, Kasireddy C. Reddy, Pankaj J. Dave
  • Patent number: 4505890
    Abstract: A controlled release pharmaceutical formulation which undergoes substantially zero order release of active drug is provided, preferably in the form of a coated tablet, containing a core portion from which the angiotensin converting enzyme inhibitor (S)-1-[3-(benzoylthio)-2-methyl-1-oxopropyl]-L-proline is slowly released over a controlled length of time. The core also includes one or more hydrocolloid gelling agents having a viscosity of within the range of from about 8000 to about 100,00 centipoises in 2% solution at 20.degree. C., such as hydroxypropylmethyl cellulose and/or methyl cellulose, one or more inert fillers or excipients, one or more lubricants, and optionally one or more anti-adherents such as silicon dioxide and water. The above-described core is coated with a conventional pharmaceutical coating composition. A method of using such controlled release formulations in treating hypertension is also provided.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: March 19, 1985
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Nemichand B. Jain, Mahendra R. Patel