Patents by Inventor Bhalchandra Shripad Lele

Bhalchandra Shripad Lele 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).

  • Single step process for the preparation of poly (oxyalkylene)-alpha, omega-dicarboxylic acid
    Patent number: 6239252
    Abstract: The invention relates to single step process for the preparation of poly (oxyalkylene)-alpha, omega-dicarboxylic acids of the formula HO2CCH2O(CH2CHRO)nCH2CO2H, wherein R is hydrogen, methyl or mixtures of hydrogen and methyl on the individual molecule and n is an integer of from 100 to 2500, comprising the steps of reacting, an oxidising agent such as poly (oxyalkylene glycol) with Jone's reagent in a polar solvent at a temperature in the range of 10° C. to room temperature for a period ranging between 1 hour to 12 hours, quenching the reaction by adding free radical scavanger, removing oxidation by-products from reaction mixture by adsorbing them on an adsorbing agent to obtain dicarboxylic acids in the solution, and evaporating the clear solution to obtain poly (oxyalkylene)-alpha, omega-dicarboxylic acids.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: May 29, 2001
    Assignee: Council of Scientific and Industrial Research
    Inventors: Bhalchandra Shripad Lele, Mohan Gopalkrishna Kulkarni