Patents by Inventor Hema Ravishankar

Hema Ravishankar 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: 9700520
    Abstract: The invention relates to a pH-dependent controlled release pharmaceutical composition, comprising a core, comprising at least one pharmaceutical active ingredient, which is an opioid, wherein the core is coated at least by one coating layer, controlling the release of the pharmaceutical composition, wherein the coating layer comprises a polymer mixture of i) 40-95% by weight, based on dry weight of the polymer mixture, of at least one water insoluble essentially neutral vinyl polymer, and ii) 5-60% by weight, based on dry weight of the polymer mixture, of at least one anionic polymer or copolymer, which is insoluble in a buffered medium below pH 4.0 and soluble at least in the range from pH 7.0 to pH 8.0, characterized in that the coating layer further contains 110 to 250% by weight, calculated on dry weight of the polymer mixture, of a non-porous inert lubricant and the coating layer is present in an amount of at least 60% by weight calculated on the weight of core.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 11, 2017
    Assignee: Evonik Roehm GmbH
    Inventors: Hans-Ulrich Petereit, Hema Ravishankar, Ashwini Samel
  • Patent number: 9555006
    Abstract: The invention relates to a pH-dependent controlled release pharmaceutical composition, comprising at least one pharmaceutical active ingredient, with the exception of opioids, wherein the core is coated at least by one coating layer, controlling the release of the pharmaceutical composition, wherein the coating layer comprises a polymer mixture of i) 40-95% by weight, based on dry weight of the polymer mixture, of at least one water insoluble essentially neutral vinyl polymer or copolymer, and ii) 5-60% by weight, based on dry weight of the polymer mixture, of at least one anionic polymer or copolymer, which is insoluble in a buffered medium below pH 4.0 and soluble at least in the range from pH 7.0 to pH 8.0. characterized in that the coating layer further contains 110 to 250% by weight, calculated on dry weight of the polymer mixture, of a non-porous inert lubricant and the is present in an amount of at least 60% by weight calculated on the weight of core.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: January 31, 2017
    Assignee: EVONIK ROEHM GmbH
    Inventors: Hans-Ulrich Petereit, Hema Ravishankar, Ashwini Samel
  • Patent number: 9237760
    Abstract: The present invention relates to a pharmaceutical or nutraceutical preparation comprising a) a core containing a pharmaceutically or nutraceutically active substance; and b) an inner controlling layer surrounding the core comprising i) one or a mixture of a plurality of (meth)acrylate copolymers bearing a cationic group or a group that can be converted to a cationic group; and ii) one or a mixture of a plurality of polymers or copolymers bearing an anionic group or group that can be converted to an anionic group; and c) an outer controlling layer comprising one or a mixture of a plurality of polymers or copolymers bearing an anionic group or group that can be converted to an anionic group and to tablets or capsules comprising same.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: January 19, 2016
    Assignee: EVONIK RÖHM GmbH
    Inventors: Hema Ravishankar, Shraddha Bodinge, Hans-Ulrich Petereit
  • Patent number: 9011907
    Abstract: The present invention relates to a pharmaceutical or nutraceutical preparation comprising a) a core containing a pharmaceutically or nutraceutically active substance and a substance that acts in a modulatory manner with regard of the release of pharmaceutically or nutraceutically active substances; and b) a controlling layer surrounding the core comprising i) 55 to 92% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate copolymers composed of 80 to 98% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from C1 to C4 alkyl esters of (meth)acrylic acid and 2 to 20% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from (meth)acrylate monomers with a quaternary ammonium group in the alkyl radical; and ii) 8 to 45% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate co
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: April 21, 2015
    Assignee: Evonik Röhm GmbH
    Inventors: Hema Ravishankar, Shradda Bodinge, Hans-Ulrich Petereit
  • Patent number: 8465769
    Abstract: A pharmaceutical preparation comprising: a) a core with an active ingredient and with an organic acid and/or the salt of an organic acid; and b) a coating which envelops the core and which comprises a polymer content of (meth)acrylate copolymers which have not more than 15% by weight of cationic or anionic groups, and which comprises at least 60% by weight of a (meth)acrylate copolymer which is composed of free-radically polymerized units of 93 to 98% by weight C1- to C4-alkyl esters of acrylic or of methacrylic acid and 7 to 2% by weight (meth)acrylate monomers having a quaternary ammonium group in the alkyl radical, wherein the active ingredient has a solubility in water of at least 10 g/l at 20° C. and the coating comprises silicon dioxide particles having an average particle size in the range from 1 to 50 ?m.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: June 18, 2013
    Assignee: Evonik Roehm GmbH
    Inventors: Hans-Ulrich Petereit, Hema Ravishankar, Shradda Bodinge
  • Publication number: 20130142877
    Abstract: The invention relates to a pharmaceutical dosage form comprising one or more antiretroviral active ingredients in the form of a solid dispersion or solid solution in a matrix, wherein said matrix comprises an amino(meth)acrylate copolymer, characterized in that the matrix does not contain any essential amounts of pharmaceutically acceptable surfactants with an HLB value from 12 to 18 and in that the matrix comprises a mono carboxylic acid or an alcohol with 12 to 22 carbon atoms or both.
    Type: Application
    Filed: March 3, 2011
    Publication date: June 6, 2013
    Applicant: EVONIK ROEHM GmbH
    Inventors: Pravin Nalawade, Smitha Shetty, Hema Ravishankar, Shripad Gadhinglajkar, Andreas Gryczke, Hans-Ulrich Petereit, Kathrin Nollenberger
  • Publication number: 20110070302
    Abstract: The present invention relates to pharmaceutical or nutraceutical preparations comprising a) a core containing a pharmaceutically or nutraceutically active substance; and b) a controlling layer surrounding the core comprising i) 55 to 92% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate copolymers composed of 80 to 98% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from C1 to C4 alkyl esters of (meth)acrylic acid and 2 to 20% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from (meth)acrylate monomers with a quaternary ammonium group in the alkyl radical; and ii) 8 to 45% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate copolymers composed of more than 5 to 59% by weight based on the weight of the copolymer of structural units derived from acrylic aci
    Type: Application
    Filed: February 1, 2008
    Publication date: March 24, 2011
    Applicant: EVONIK ROEHM GMBH
    Inventors: Hema RAVISHANKAR, Hans-Ulrich PETEREIT, Shradda BODINGE
  • Publication number: 20100291202
    Abstract: The present invention relates to a pharmaceutical or nutraceutical preparation comprising a) a core containing a pharmaceutically or nutraceutically active substance and a substance that acts in a modulatory manner with regard of the release of pharmaceutically or nutraceutically active substances; and b) a controlling layer surrounding the core comprising i) 55 to 92% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate copolymers composed of 80 to 98% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from C1 to C4 alkyl esters of (meth)acrylic acid and 2 to 20% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from (meth)acrylate monomers with a quaternary ammonium group in the alkyl radical; and ii) 8 to 45% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate co
    Type: Application
    Filed: February 1, 2008
    Publication date: November 18, 2010
    Applicant: EVONIK ROEHM GMBH
    Inventors: Hema Ravishankar, Shradda Bodinge, Hans-Ulrich Petereit
  • Publication number: 20100255092
    Abstract: The present invention relates to pharmaceutical or nutraceutical preparations comprising a) a core containing a pharmaceutically or nutraceutically active substance; and b) a controlling layer surrounding the core comprising i) 55 to 92% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate copolymers composed of 80 to 98% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from Ci to C4 alkyl esters of (meth)acrylic acid and 2 to 20% by weight based on the weight of the (meth)acrylic copolymer of structural units derived from (meth)acrylate monomers with a quaternary ammonium group in the alkyl radical; and ii) 8 to 45% by weight based on the total weight of (meth)acrylic copolymers present in the layer of one or a mixture of a plurality of (meth)acrylate copolymers composed of more than 5 to 59% by weight based on the weight of the copolymer of structural units derived from acrylic acid o
    Type: Application
    Filed: February 1, 2008
    Publication date: October 7, 2010
    Applicant: Evonik Roehm Gmbh
    Inventors: Hema Ravishankar, Hans-Ulrich Petereit, Shradda Bodinge
  • Publication number: 20100247639
    Abstract: The present invention relates to a pharmaceutical or nutraceutical preparation comprising a) a core containing a pharmaceutically or nutraceutically active substance; and b) an inner controlling layer surrounding the core comprising i) one or a mixture of a plurality of (meth)acrylate copolymers bearing a cationic group or a group that can be converted to a cationic group; and ii) one or a mixture of a plurality of polymers or copolymers bearing an anionic group or group that can be converted to an anionic group; and c) an outer controlling layer comprising one or a mixture of a plurality of polymers or copolymers bearing an anionic group or group that can be converted to an anionic group and to tablets or capsules comprising same.
    Type: Application
    Filed: February 1, 2008
    Publication date: September 30, 2010
    Applicant: EVONIK ROEHM GMBH
    Inventors: Hema Ravishankar, Shradda Bodinge, Hans-Ulrich Petereit
  • Publication number: 20100226978
    Abstract: The invention relates to a pH-dependent controlled release pharmaceutical composition, comprising a core, comprising at least one pharmaceutical active ingredient, which is an opioid, wherein the core is coated at least by one coating layer, controlling the release of the pharmaceutical composition, wherein the coating layer comprises a polymer mixture of i) 40-95% by weight, based on dry weight of the polymer mixture, of at least one water insoluble essentially neutral vinyl polymer, and ii) 5-60% by weight, based on dry weight of the polymer mixture, of at least one anionic polymer or copolymer, which is insoluble in a buffered medium below pH 4.0 and soluble at least in the range from pH 7.0 to pH 8.0, characterized in that the coating layer further contains 110 to 250% by weight, calculated on dry weight of the polymer mixture, of a non-porous inert lubricant and the coating layer is present in an amount of at least 60% by weight calculated on the weight of core.
    Type: Application
    Filed: September 25, 2007
    Publication date: September 9, 2010
    Applicant: Evonik Roehm GmbH
    Inventors: Hans-Ulrich Petereit, Hema Ravishankar, Ashwini Samel
  • Publication number: 20100221324
    Abstract: The invention relates to a pH-dependent controlled release pharmaceutical composition, comprising at least one pharmaceutical active ingredient, with the exception of opioids, wherein the core is coated at least by one coating layer, controlling the release of the pharmaceutical composition, wherein the coating layer comprises a polymer mixture of i) 40-95% by weight, based on dry weight of the polymer mixture, of at least one water insoluble essentially neutral vinyl polymer or copolymer, and ii) 5-60% by weight, based on dry weight of the polymer mixture, of at least one anionic polymer or copolymer, which is insoluble in a buffered medium below pH 4.0 and soluble at least in the range from pH 7.0 to pH 8.0. characterized in that the coating layer further contains 110 to 250% by weight, calculated on dry weight of the polymer mixture, of a non-porous inert lubricant and the is present in an amount of at least 60% by weight calculated on the weight of core.
    Type: Application
    Filed: September 25, 2007
    Publication date: September 2, 2010
    Applicant: EVONIK ROEHM GMBH
    Inventors: Hans-Ulrich Petereit, Hema Ravishankar, Ashwini Samel
  • Publication number: 20080220080
    Abstract: The invention relates to a multiparticulate pharmaceutical form, comprising pellets with a multilayer structure for controlled active ingredient release, comprising a) a core layer comprising a substance having a modulating effect, b) an inner controlling layer which influences the delivery of the substance having a modulating effect, consisting of pharmaceutically usable polymers, waxes, resins and/or proteins, c) an active ingredient layer comprising an active pharmaceutical ingredient and, where appropriate, a substance having a modulating effect, d) an outer controlling layer comprising at least 60% by weight of one or a mixture of a plurality of (meth)acrylate copolymers where the layers may additionally and in a manner known per se comprise pharmaceutically usual excipients, where the outer controlling layer d) has a thickness from 20 to less than 55 ?m and contains 0.
    Type: Application
    Filed: March 3, 2006
    Publication date: September 11, 2008
    Applicant: RÖHM GMBH
    Inventors: Hans-Ulrich Petereit, Rosario Lizio, Hema Ravishankar, Ashwini Samel
  • Publication number: 20080152719
    Abstract: The invention relates to a multiparticulate pharmaceutical form, comprising pellets with a multilayer structure for controlled active ingredient release, comprising a) optionally a neutral core (nonpareilles), b) an inner controlling layer comprising a substance having a modulating effect, which is embedded in a matrix which influences the delivery of the modulatory substance and which comprises pharmaceutically usable polymers, waxes, resins and/or proteins, and where appropriate an active ingredient, c) an active ingredient layer comprising an active pharmaceutical ingredient and, where appropriate, a substance having a modulating effect, d) an outer controlling layer comprising at least 60% by weight of one or a mixture of a plurality of (meth) acrylate copolymers where the outer controlling layer has a thickness from 20 to less than 55 ?m and contains 0,1 to 10% by weight of glycerol monostearate, where the multiparticulate pharmaceutical form contains 20 to 60% by weight of the pellets, which are compres
    Type: Application
    Filed: March 3, 2006
    Publication date: June 26, 2008
    Applicant: ROEHM GMBH
    Inventors: Hans-Ulrich Petereit, Rosario Lizio, Hema Ravishankar, Ashwini Samel
  • Publication number: 20080081070
    Abstract: Formulations have been developed to improve the solubility of corticosteroids such as fluticasone proprionate in a composition designed to achieve localized release of the drug in the small intestine and/or colon. In one embodiment, solid dispersions of fluticasone are prepared wherein the drug is blended with or coated onto a highly water soluble substrate such as nonpareil (sugar beads) then coated with a layer of polymer soluble in small intestinal fluid, then coated with an enteric coating. The inner polymer layer controls release of the drug, and the enteric coating, a pH sensitive polymer that is broken down in the ileum and colon, controls localized release of drug at various sites within the gastrointestinal tract. The multilayer pharmaceutical composition can be in the form of pellets, tablets compressed from pellets or pellets packed into capsules. The release profile of the drug can be manipulated by (1) altering size or shape (i.e.
    Type: Application
    Filed: February 28, 2007
    Publication date: April 3, 2008
    Inventors: Glynn Wilson, Gerhard Renner, Hema Ravishankar, Preeti Patil
  • Publication number: 20080044470
    Abstract: A pharmaceutical preparation comprising: a) a core with an active ingredient and with an organic acid and/or the salt of an organic acid; and b) a coating which envelops the core and which comprises a polymer content of (meth)acrylate copolymers which have not more than 15% by weight of cationic or anionic groups, and which comprises at least 60% by weight of a (meth)acrylate copolymer which is composed of free-radically polymerized units of 93 to 98% by weight C1- to C4-alkyl esters of acrylic or of methacrylic acid and 7 to 2% by weight (meth)acrylate monomers having a quaternary ammonium group in the alkyl radical, wherein the active ingredient has a solubility in water of at least 10 g/l at 20° C. and the coating comprises silicon dioxide particles having an average particle size in the range from 1 to 50 ?m.
    Type: Application
    Filed: April 3, 2007
    Publication date: February 21, 2008
    Applicant: ROEHM GMBH
    Inventors: Hans-Ulrich Petereit, Hema Ravishankar, Shraddh Bodinge
  • Publication number: 20060269605
    Abstract: The invention relates to a multilayer pharmaceutical dosage form for the controlled release of active substances, containing: a) a core layer containing a substance that acts in a modulatory manner with regard to the release of active substances, optionally a neutral core and/or an active substance; b) an inner control layer that influences the release of the substance that acts in a modulatory manner and of the optionally contained active substance from the core layer, containing pharmaceutically useable polymers, waxes, resins and/or proteins; c) an active substance layer containing a pharmaceutical active substance and, optionally, a substance that acts in a modulatory manner; d) an outer control layer containing a (meth)acrylate copolymer or a mixture consisting of a number of (meth)acrylate copolymers comprised of 98 to 85 C1-C4 alkyl esters of (meth)acrylic acid and 2 to 15% by weight of methacrylate monomers with a quaternary ammonium group in the alkyl radical and optionally containing pharmaceuticall
    Type: Application
    Filed: September 15, 2004
    Publication date: November 30, 2006
    Applicant: Roehm Gmbh & Co. KG
    Inventors: Rosario Lizio, Hans-Ulrich Petereit, Manfred Assmus, Hema Ravishankar
  • Patent number: 6759395
    Abstract: The invention provides a novel soft gelatin capsule comprising a fill material consisting essentially of S-adenosylmethionine (SAMe) salt disposed within an enteric coated soft gelatin film.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: July 6, 2004
    Assignee: Orchid Chemicals & Pharmaceuticals, Ltd.
    Inventors: Canakapalli Bhaktavatsala Rao, Prasanta Kumar Chakrabarti, Hema Ravishankar
  • Publication number: 20020164369
    Abstract: The invention provides a novel soft gelatin capsule comprising a fill material consisting essentially of S-adenosylmethionine (SAMe) salt disposed within an enteric coated soft gelatin film.
    Type: Application
    Filed: December 18, 2001
    Publication date: November 7, 2002
    Inventors: Canakapalli Bhaktavatsala Rao, Prasanta Kumar Chakrabarti, Hema Ravishankar