Patents by Inventor Sarkar Subrata

Sarkar Subrata 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).

  • JET PUMP
    Publication number: 20210317845
    Abstract: A jet pump may include a body that may include an inlet portion having a motive port and a first induce port, a throat, a tapered wall connecting the inlet portion with the throat, a discharge port, and a diffuser connecting the throat and the discharge port. The tapered wall may include a converging angle of about 5 degrees.
    Type: Application
    Filed: April 13, 2021
    Publication date: October 14, 2021
    Inventors: Kuntalika Das, Sarkar Subrata, Alan Massey
  • Method of preparation of paclitaxel (taxol) using 3-(alk-2-ynyloxy) carbonyl-5-oxazolidine carboxylic acid
    Patent number: 6506905
    Abstract: 3-(alk-2-ynyloxy)carbonyl-5-oxazolidine carboxylic acid and its analogs having a formula and wherein R1 is hydrogen, aryl, heteroaryl, alkyl, alkenyl, alkynyl, R2 and R3 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, R4 is hydrogen, alkyl, alkenyl, alkynyl, aryl, substituted aryl, heteroaryl, R5 and R6 independently selected from hydrogen, alkyl, alkenyl,alkynyl, arly, heteroaryl, alkoxy, alkeyloxy, alkynyloxy, aryloxy, heteroaryloxy.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: January 14, 2003
    Assignee: Dabur India Limited
    Inventors: Sharma Arun Prakash, Sarkar Subrata