Patents by Inventor Rajan Hiralal Naik

Rajan Hiralal Naik 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 synthesis of dipyrromethanes
    Patent number: 6852864
    Abstract: The present invention provides an improved method for the preparation of dipyrromethanes by reacting the pyrrole with an aldehyde in the presence of an cation exchange resin.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: February 8, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Rajan Hiralal Naik, Padmakar Laxman Joshi
  • Process for the synthesis of dipyrromethanes
    Publication number: 20030187278
    Abstract: The present invention provides an improved method for the preparation of dipyrromethanes by reacting the pyrrole with an aldehyde in the presence of an cation exchange resin.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Inventors: Rajan Hiralal Naik, Padmakar Laxman Joshi
  • Pesticidal ester preparation
    Patent number: 5750757
    Abstract: A process for the preparation of an S-alkyl ester of an N-alkyl carbamothioic acid having the formula: ##STR1## wherein R and R.sub.2 are each an alkyl group and R.sub.1 is hydrogen or alkyl, which includes refluxing the corresponding alkyl ester of N-alkyl thiocarbamio acid having the formula I ##STR2## wherein R and R.sub.2 are each alkyl and R.sub.1 is hydrogen or alkyl, in the presence of an acid catalyst selected from the group consisting of iodine and sulfuric acid.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: May 12, 1998
    Assignee: Council of Scientific and Industrial Research
    Inventors: Abdul Rakeeb Abdul Subhan Deshmukh, Rajan Hiralal Naik, Sagun Kashinath Tandel, Srinivasachari Rajappa