Patents by Inventor Nachiappan Chidambaram

Nachiappan Chidambaram 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: 20070098786
    Abstract: An enteric valproic acid soft gelatin capsule, in which the enteric polymer is a component of the capsule shell rather than a coating, has been developed. The fill material comprises valproic acid or divalproex sodium and, optionally, one or more pharmaceutically acceptable excipients such as corn oil. The capsule shell is prepared from a mass comprising a film-forming polymer, an acid insoluble polymer, an aqueous solvent, and optionally a plasticizer. Suitable film-forming polymers include gelatin. Suitable acid-insoluble polymers include acrylic-acid/methacrylic acid copolymers. The acid-insoluble polymer is present in an amount from about 8% to about 20% by weight of the wet gel mass. The weight ratio of acid-insoluble polymer to film-forming polymer is from about 25% to about 50%. The aqueous solvent is water or an aqueous solution of alkalis such as ammonia or diethylene amine or hydroalcoholic solutions of the same. Suitable plasticizers include glycerin and triethylcitrate.
    Type: Application
    Filed: October 11, 2006
    Publication date: May 3, 2007
    Inventors: Nachiappan Chidambaram, Aqeel Fatmi
  • Publication number: 20070082046
    Abstract: An enteric valproic acid soft gelatin capsule, in which the enteric polymer is a component of the capsule shell rather than a coating, has been developed. The fill material comprises valproic acid or divalproex sodium and, optionally, one or more pharmaceutically acceptable excipients such as corn oil. The capsule shell is prepared from a mass comprising a film-forming polymer, an acid insoluble polymer, an aqueous solvent, and optionally a plasticizer. Suitable film-forming polymers include gelatin. Suitable acid-insoluble polymers include acrylic-acid/methacrylic acid copolymers. The acid-insoluble polymer is present in an amount from about 8% to about 20% by weight of the wet gel mass. The weight ratio of acid-insoluble polymer to film-forming polymer is from about 25% to about 50%. The aqueous solvent is water or an aqueous solution of alkalis such as ammonia or diethylene amine or hydroalcoholic solutions of the same. Suitable plasticizers include glycerin and triethylcitrate.
    Type: Application
    Filed: October 11, 2005
    Publication date: April 12, 2007
    Inventors: Nachiappan Chidambaram, Aqeel Fatmi
  • Publication number: 20070053868
    Abstract: Liquid and semi-solid pharmaceutical compositions, which can be administered in liquid form or can be used for preparing capsules, are described herein. The composition comprises the salt of one ore more active agents, polyethylene glycol, 0.2-1.0 mole equivalents of a de-ionizing agent per mole of active agent, and water. The pH of the composition is adjusted within the range of 2.5-7.5. The de-ionizing agent causes partial de-ionization (neutralization) of the salt of the active agent resulting in enhanced bioavailability of salts of weakly acidic, basic or amphoteric active agents as well as lesser amounts of polyethylene glycol (PEG) esters.
    Type: Application
    Filed: March 3, 2006
    Publication date: March 8, 2007
    Inventors: Nachiappan Chidambaram, Aqeel Fatmi
  • Publication number: 20060165778
    Abstract: A gel mass is provided that is useful in manufacturing enteric soft or hard capsules, or enteric tablets without coating.
    Type: Application
    Filed: June 27, 2003
    Publication date: July 27, 2006
    Inventors: Emadeldin Hassan, Aqeel Fatmi, Nachiappan Chidambaram
  • Publication number: 20060115527
    Abstract: Controlled release preparations and capsules are provided. Also provided are emulsions and suspensions, including compositions and methods of manufacturing controlled release capsules, where the fill contains a suspension and/or an emulsion.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 1, 2006
    Inventors: Emadeldin Hassan, Nachiappan Chidambaram, Aqeel Fatmi
  • Publication number: 20060088590
    Abstract: A non-blooming plasticizer composition and methods of using the composition are described herein. The composition is a mixture of sorbitol and sorbitan wherein the ratio of sorbitan and sorbitol is between about 0.40 and about 1.2 by weight, more preferably from about 0.45-0.50 to about 0.70 by weight, wherein the composition contains less than 20% of other dextrose hydrolytic degradation products. The non-blooming plasticizer compositions can be mixed, alone or in combination with other shell additives, with gelatin or non-gelatin materials to prepare soft capsules for the delivery of pharmaceutical, nutritional and personal care products, such as bath oils, shampoos and conditioners, and skin lotions.
    Type: Application
    Filed: March 18, 2005
    Publication date: April 27, 2006
    Inventors: Karunakar Sukuru, Nachiappan Chidambaram, Aqeel Fatmi