Patents by Inventor Suneel Yeshwant Dike

Suneel Yeshwant Dike 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 preparation of atovaquone and novel intermediates thereof
    Patent number: 7847127
    Abstract: Disclosed herein is a novel process for preparation of atovaquone. The process includes reacting 1,4-naphthoquinone with trans-4-(4-chlorophenyl) cyclohexane carboxylic acid followed by halogenation to obtain a dihalo-compound. Further, dehydrohalogenation of the dihalo-compound produces a monohalogeno-compound which under goes hydrolysis to produce atovaquone. The invention also discloses atovaquone in a substantially pure and well defined polymorphic form designated as “Form IPCA-ATO,” and the preparation thereof.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: December 7, 2010
    Assignee: IPCA Laboratories Limited
    Inventors: Ashok Kumar, Suneel Yeshwant Dike, Pramil Kumar Mathur, Nellithanath Thankachen Byju, Brajesh Sharma, Swapnil Shreekant Kore, Vitthal Suryabhan Buchude, Dharmendra Singh
  • NEW PROCESS FOR PREPARATION OF ATOVAQUONE AND NOVEL INTERMEDIATES THEREOF
    Publication number: 20100081847
    Abstract: Disclosed herein is a novel process for preparation of atovaquone. The process includes reacting 1,4-naphthoquinone with trans-4-(4-chlorophenyl) cyclohexane carboxylic acid followed by halogenation to obtain a dihalo-compound. Further, dehydrohalogenation of the dihalo-compound produces a monohalogeno-compound which under goes hydrolysis to produce atovaquone. The invention also discloses atovaquone in a substantially pure and well defined polymorphic form designated as “Form IPCA-ATO,” and the preparation thereof.
    Type: Application
    Filed: October 21, 2009
    Publication date: April 1, 2010
    Inventors: Ashok Kumar, Suneel Yeshwant Dike, Pramilkumar Mathur, Nellithanath Thankachen Byju, Brajesh Sharma, Swapnil Shreekant Kore, Vitthal Suryabhan Buchude, Dharmendra Singh
  • NOVEL POLYMORPH OF ATOVAQUONE
    Publication number: 20090221715
    Abstract: The present invention relates to a novel polymorphic form of atovaquone. More particularly, it relates to a novel crystalline form, that has improved solubility and other bulk characteristics suitable for pharmaceutical application. The present invention also relates to processes for preparing a new polymorphic form of atovaquone and its use in industry.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 3, 2009
    Inventors: Ashok Kumar, Suneel Yeshwant Dike, Pramilkumar Mathur, Nellithanath Thankachen Byju, Brajesh Sharma, Swapnil Shreekant Kore, Vitthal Suryabhan Buchude, Dharmendra Singh
  • Tramadol recovery process
    Patent number: 7470816
    Abstract: A process for the resolution of isomeric tramadol mixtures comprising: providing a purification stock comprising both cis and trans tramadol; contacting the purification stock with an acid under conditions effective to form an acid salt of the cis and trans tramadol in the purification stock; and separating the cis tramadol acid salt from the trans tramadol to obtain a purified cis tramadol acid salt; and optionally converting the cis tramadol acid salt to cis tramadol or to a pharmaceutically active salt thereof.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: December 30, 2008
    Assignee: IPAC Laboratories Limited
    Inventors: Ashok Kumar, Suneel Yeshwant Dike, Satish Rajanikant Soudagar, Chirag Hasmukh Shah, Sandeep Madhavrao Burudkar, Prashant Gautam, Byju Nellithanath Thankachen, Ashvini Saxena, Manavalan Saravanan, Gunjan Pramod Pathak, Virendra Pal, Rahul Karde, Jaysingh Gehlot
  • Process for manufacture of 4-amino-hydroxybutylidene-1, 1-bisphosphonic acid and its salts
    Patent number: 7414151
    Abstract: The preset invention relates to a cost effective, high yielding, reproducible method for the manufacture of alendronic acid or its salt, such as sodium alendronate, from inexpensive and readily available pyrrolidone using phosphonating agents such as PCl3 in the presence of acids such as sulphonic acids, sulphuric acid or phosphoric acid, and pharmaceutical dosage forms of alendronic acid or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: August 19, 2008
    Assignee: IPCA Laboratories Ltd.
    Inventors: Ashok Kumar, Suneel Yeshwant Dike, Avinash Manohar Nijasure, Vijaya Bhaware