Patents by Inventor Kothandapani Loganathan

Kothandapani Loganathan 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).

  • Process for the preparation of d-threo-ritalinic acid hydrochloride by resolution of dl-threo-ritalinic acid using chiral carboxylic acid
    Patent number: 8552030
    Abstract: The invention disclosed in this application relates to an improved process for the manufacture of d-threo-ritalinic acid hydrochloride and l-threo-ritalinic acid hydrochloride in an optically pure form by the resolution of dl-threo-ritalinic acid using a chiral carboxylic acid The d-threo-ritalinic acid hydrochloride prepared by the process of the present invention on esterification gives d-threo-methylphenidate, a very well known CNS stimulant.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: October 8, 2013
    Assignee: Malladi Drugs & Pharmaceuticals Ltd.
    Inventors: Tangirala Prakasam, Borkatte Narasimha Hitesh Kumar, Sangu Perumal, Kothandapani Loganathan
  • Process for the Preparation of d-threo-Ritalinic Acid Hydrochloride by Resolution of dl-threo-Ritalinic Acid Using Chiral Carboxylic Acid
    Publication number: 20110130569
    Abstract: The invention disclosed in this application relates to an improved process for the manufacture of d-threo-ritalinic acid hydrochloride and l-threo-ritalinic acid hydrochloride in an optically pure form by the resolution of dl-threo-ritalinic acid using a chiral carboxylic acid The d-threo-ritalinic acid hydrochloride prepared by the process of the present invention on esterification gives d-threo-methylphenidate, a very well known CNS stimulant.
    Type: Application
    Filed: July 3, 2009
    Publication date: June 2, 2011
    Inventors: Tangirala Prakasam, Borkatte Narasimha Hitesh Kumar, Sangu Perumal, Kothandapani Loganathan