Patents by Inventor Gurunath H. Kulkarni

Gurunath H. Kulkarni 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 aryl esters of N-alkyl carbamic acids
    Patent number: 5066819
    Abstract: The invention relates to a process for the preparation of aryl esters of N-alkyl carbamic acids. The process comprises reacting an alkyl N-alkyl carbamate of the general formula:R.sub.1 --NH--COO--R.sub.3wherein R.sub.1 and R.sub.3 are both alkyl groups, with a substituted phenol in the presence of a halogen-containing phosphorous compound to produce an aryl ester of N-alkyl carbamic acid having the general formula:R.sub.1 --NH--COO--R.sub.2wherein R.sub.1 is an alkyl group and R.sub.2 is an aryl group derived from the substituted phenol. In a preferred embodiment of the invention, the process is used for the preparation of aryl esters of N-methyl carbamic acid.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: November 19, 1991
    Assignee: Council of Scientific & Industrial Research
    Inventors: Gurunath H. Kulkarni, Rajan H. Naik, Srinivasachari Rajappa