Patents by Inventor Chaphekar Gopal Moreshwar

Chaphekar Gopal Moreshwar 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 thiourea
    Patent number: 6657082
    Abstract: The present invention relates to an improved process for the preparation of thiourea. The object of the present invention is to provide an improved process for the preparation of Thiourea using Calcium Cyanamide, carbon dioxide and hydrogen sulphide. The process of the present invention comprises passing a mixture of Carbon dioxide and hydrogen sulphide into a slurry formed by addition of major part of calcium cyanamide charge into water using constant stirring, maintaining alkaline pH at a temperature ranging between ambient to 80° C., stopping the addition of hydrogen sulphide, continuing the slow passing of carbon dioxide and addition of remaining part of calcium cyanamide charge and retaining the reaction mass to complete the secondary reactions to form the product for a period ranging from 2-5 hours and continuing passing of carbon dioxide at an increased rate for effecting decomposition of Ca(SH)2 for a period of 1.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: December 2, 2003
    Assignee: Council of Scientific and Industrial Research
    Inventors: Balakrishnan Srinivasa, Mahajan Shankar Shivram, Chaphekar Gopal Moreshwar, Gupte Milind Yeshwant, Kulkarni Mohan Parshuram, Bandarupalli Radha Krishna Murthy
  • PROCESS FOR THE PREPARATION OF THIOUREA
    Publication number: 20030060662
    Abstract: The present invention relates to an improved process for the preparation of thiourea. The object of the present invention is to provide an improved process for the preparation of Thiourea using Calcium Cyanamide, carbon dioxide and hydrogen sulphide. The process of the present invention comprises passing a mixture of Carbon dioxide ad hydrogen sulphide into a slurry formed by addition of major part of calcium cyanamide charge into water using constant stirring, maintaining alkaline pH at a temperature ranging between ambient to 80° C., stopping the addition of hydrogen sulphide, continuing the slow passing of carbon dioxide and addition of remaining part of calcium cyanamide charge and retaining the reaction mass to complete the secondary reactions to form the product for a period ranging from 2-5 hours and continuing passing of carbon dioxide at an increased rate for effecting decomposition of Ca(SH)2 for a period of 1.
    Type: Application
    Filed: March 24, 1998
    Publication date: March 27, 2003
    Inventors: BALAKRISHNAN SRINIVASA, MAHAJAN SHANKAR SHIVRAM, CHAPHEKAR GOPAL MORESHWAR, GUPTE MILIND YESHWANT, KULKARNI MOHAN PARSHURAM, BANDARUPALLI RADHA K MURTHY