Patents by Inventor Qianli Chu

Qianli Chu 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).

  • Cyclobutane-containing thermally cleavable polymers
    Patent number: 12104012
    Abstract: A polymer is made by polymerization of CBDA-4 monomers with a glycerol linker through a condensation reaction. The resulting polymer is thermally cleavable having a plurality of CBDA-4 monomers linked with the glycerol linkers, making it recyclable when heated and degraded. The resulting intermediate material can be hydrolyzed back to initial starting material for synthesizing CBDA-4 monomers.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: October 1, 2024
    Assignee: UNIVERSITY OF NORTH DAKOTA
    Inventors: Qianli Chu, Zhihan Wang
  • Method of making cyclobutane-1, 2-diacids degradable building blocks for materials
    Patent number: 11453635
    Abstract: A method of making cyclobutane-1,2-diacid building blocks includes using trans-cinnamic acid in its beta form (head to head packing) and photodimerizing the trans-cinnamic acid to create cis-cyclobutane-1,2-dicarboxylic acid (CBDA-4).
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: September 27, 2022
    Assignee: University of North Dakota
    Inventors: Qianli Chu, Zhihan Wang
  • Polymers comprising 1,3-cyclobutane dimethanol (CBDO-1)
    Patent number: 11326054
    Abstract: A polymer includes a plurality of repeated polymerized units according to scheme (2):
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: May 10, 2022
    Assignee: The University of North Dakota
    Inventors: Qianli Chu, Rahul Shahni
  • POLYMERS COMPRISING 1,3-CYCLOBUTANE DIMETHANOL (CBDO-1)
    Publication number: 20220025173
    Abstract: A polymer includes a plurality of repeated polymerized units according to scheme (2):
    Type: Application
    Filed: August 25, 2020
    Publication date: January 27, 2022
    Applicant: The University of North Dakota
    Inventors: Qianli Chu, Rahul Shahni
  • CYCLOBUTANE-CONTAINING THERMALLY CLEAVABLE POLYMERS
    Publication number: 20210363294
    Abstract: A polymer is made from polymerization of CBDA monomers. The resulting polymer is thermally cleavable, making it recyclable when heated and degraded. The resulting intermediate material can be hydrolyzed back to initial starting material for synthesizing CBDA monomers.
    Type: Application
    Filed: November 25, 2019
    Publication date: November 25, 2021
    Applicant: University of North Dakota
    Inventors: Qianli Chu, Zhihan Wang
  • METHOD OF MAKING CYCLOBUTANE-1, 2-DIACIDS DEGRADABLE BUILDING BLOCKS FOR MATERIALS
    Publication number: 20210347718
    Abstract: A method of making cyclobutane-1,2-diacid building blocks includes using trans-cinnamic acid in its beta form (head to head packing) and photodimerizing the trans-cinnamic acid to create cis-cyclobutane-1,2-dicarboxylic acid (CBDA4).
    Type: Application
    Filed: November 25, 2019
    Publication date: November 11, 2021
    Applicant: University of North Dakota
    Inventors: Qianli Chu, Zhihan Wang
  • CYCLOBUTANE-1, 3-DIACID BUILDING BLOCKS
    Publication number: 20190002387
    Abstract: A method of making polymers utilizes cyclobutane-1,3-diacid (CBDA) molecules as polymer building blocks includes and linker molecules with a non-reactive R group and at least two reactive X groups used to create chemically stable polymers of CBDA. The resulting polymers are thermally, photochemically, and chemically stable.
    Type: Application
    Filed: June 30, 2018
    Publication date: January 3, 2019
    Inventors: Qianli Chu, Zhihan Wang
  • CARBON DIOXIDE CAPTURE AND CONVERSION TO A CARBAMATE SALT AND POLYUREA
    Publication number: 20140024800
    Abstract: A method for treating carbon dioxide includes preparing a polyamine composition and delivering a stream containing carbon dioxide to the polyamine composition. The carbon dioxide reacts with polyamine in the polyamine composition to form a carbamate salt. A method for producing polyurea from carbon dioxide includes delivering a stream containing carbon dioxide to a polyamine composition. The carbon dioxide reacts with polyamine in the polyamine composition to form a carbamate salt. The method also includes dehydrating the carbamate salt to produce polyurea.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 23, 2014
    Applicant: UNIVERSITY OF NORTH DAKOTA
    Inventor: Qianli Chu