Patents by Inventor Arun Kanti Das

Arun Kanti Das 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).

  • Eco friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soaked L (green grams)
    Patent number: 7179624
    Abstract: The present invention relates to a new eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soked phaseolus aureus L (green grams).
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: February 20, 2007
    Assignee: Council of Scientific and Industrial Research
    Inventors: Pardhasaradhi Malladi, Kumaraswamy Gullapalli, Ramesh Sunkanapally, Chembumkulam Kamalakshyamma Snehalatha Nair, Arun Kanti Das
  • Eco friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soaked phaseolus aureus L (green gram)
    Publication number: 20040191879
    Abstract: The present invention relates to a new eco-friendly process for the preparation of chiral alcohols by asymmetric reduction of prochiral ketones in water using soked phaseolus aureus L (green grams).
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Inventors: Pardhasaradhi Malladi, Kumaraswamy Gullapalli, Ramesh Sunkanapally, Chembumkulam Kamalakshyamma Nair, Arun Kanti Das
  • Process for the preparation of N-(2,3-Dihydrobenzo[1,4]dioxin-2-carbonyl)piperazine
    Patent number: 6608200
    Abstract: Described herein is an improved process for the preparation of N-(2,3-Dihydrobenzo[1,4]dioxin-2-carbonyl)piperazine which includes heating a reaction mixture ethyl of 2,3-dihydrobenzo[1,4]dioxin-2-carboxylate and piperazine. The reaction mixture is then subjected to series of washes and extraction to yield N-(2,3-Dihydrobenzo[1,4]dioxin-2-carbonyl)piperazine having a purity of greater than 99.9%.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: August 19, 2003
    Assignee: Council of Scientific & Industrial Research
    Inventors: Malladi Pardhasaradhi, Gullapalli Kumaraswamy, Arun Kanti Das, Nivedita Jena, Chembumkulam Kamalakshyamma Snehalatha Nair, Mudiganti Naga Venkata Sastry
  • Process for the preparation of ethyl 2,3-dihydrobenzo[1,4]dioxin-2-carboxylate
    Patent number: 6555695
    Abstract: The present invention relates to an improved process for the preparation of ethyl 2,3-dihydrobenzo[1,4]dioxin-2-carboxylate. More particularly the present invention provides a process for the preparation of ethyl 2,3-dihydrobenzo[1,4]dioxin-2-carboxylate in hydrocarbon solvent in the presence of a base and catalytic amount of a phase transfer catalyst.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: April 29, 2003
    Assignee: Council of Scientific & Industrial Research
    Inventors: Malladi Pardhasaradhi, Gullapalli Kumaraswamy, Arun Kanti Das, Nivedita Jena, Chembumkulam Kamalakshyamma Snehalatha Nair