Patents by Inventor Umesh Choudhary

Umesh Choudhary 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).

  • Method for deblocking a blocked isocyanate and method of making a polyurethane
    Patent number: 11254784
    Abstract: A method for deblocking a blocked isocyanate is described herein. The method includes contacting a blocked isocyanate and a halide ion source under conditions effective to provide a deblocked isocyanate. A method of making a polyurethane is also disclosed. The method of making a polyurethane includes combining a blocked isocyanate, a polyol, and a halide ion source in the presence of solvent and under conditions effective to provide the polyurethane.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: February 22, 2022
    Assignees: THE UNIVERSITY OF MASSACHUSETTS, BASF SE
    Inventors: Madhu Sheri, Umesh Choudhary, Todd Emrick, Sunitha Grandhee
  • METHOD FOR DEBLOCKING A BLOCKED ISOCYANATE AND METHOD OF MAKING A POLYURETHANE
    Publication number: 20200239623
    Abstract: A method for deblocking a blocked isocyanate is described herein. The method includes contacting a blocked isocyanate and a halide ion source under conditions effective to provide a deblocked isocyanate. A method of making a polyurethane is also disclosed. The method of making a polyurethane includes combining a blocked isocyanate, a polyol, and a halide ion source in the presence of solvent and under conditions effective to provide the polyurethane.
    Type: Application
    Filed: August 31, 2018
    Publication date: July 30, 2020
    Inventors: Madhu Sheri, Umesh Choudhary, Todd Emrick, Sunitha Grandhee
  • Unsaturated deoxybenzoin compounds and polymers prepared therefrom
    Patent number: 10065913
    Abstract: Deoxybenzoin compounds including unsaturation are disclosed. The unsaturated deoxybenxoin compounds have the structure (I), (II), or (III) wherein R1, R2, R3, R4, R5, R6, and n are defined herein. Also disclosed are polyesters including repeating units having the structure (IV), (V), or a combination thereof wherein Ar1, R7, and m are defined herein. The polyesters can be further functionalized, for example by various phosphorous-containing compounds. The polyesters described herein can be useful for the preparation of various articles having reduced flammability.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: September 4, 2018
    Assignee: THE UNIVERSITY OF MASSACHUSETTS
    Inventors: Aabid A. Mir, Todd Emrick, Umesh Choudhary
  • UNSATURATED DEOXYBENZOIN COMPOUNDS AND POLYMERS PREPARED THEREFROM
    Publication number: 20170101361
    Abstract: Deoxybenzoin compounds including unsaturation are disclosed. The unsaturated deoxybenxoin compounds have the structure (I), (II), or (III) wherein R1, R2, R3, R4, R5, R6, and n are defined herein. Also disclosed are polyesters including repeating units having the structure (IV), (V), or a combination thereof wherein Ar1, R7, and m are defined herein. The polyesters can be further functionalized, for example by various phosphorous-containing compounds. The polyesters described herein can be useful for the preparation of various articles having reduced flammability.
    Type: Application
    Filed: October 6, 2016
    Publication date: April 13, 2017
    Inventors: Aabid A. Mir, Todd Emrick, Umesh Choudhary