Patents by Inventor Sandip Kumar Singh

Sandip Kumar Singh 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).

  • LIGNIN-BASED ADHESIVE FORMULATIONS AND RELATED METHODS
    Publication number: 20250368873
    Abstract: Adhesive compositions are provided which comprise a crosslinked lignin polymer network comprising lignin polymer chains and carbodiimide linkages, wherein crosslinks are present between the lignin polymer chains, between portions of a lignin polymer chain, or both, and wherein the carbodiimide linkages are each represented by formula —N?C?N—, wherein at least one “—” represents a covalent bond that connects the carbodiimide linkage to a lignin polymer chain. Adhesive formulations for providing the adhesive compositions are also provided as well as related methods.
    Type: Application
    Filed: June 2, 2025
    Publication date: December 4, 2025
    Inventors: Bala Subramaniam, Sandip Kumar Singh, Thomas P. Binder, Erik Hagberg
  • Process for depolymerization of lignin
    Patent number: 9550710
    Abstract: The present invention discloses a process for depolymerization of lignin to yield substituted phenolic monomers using Brönsted ionic liquid as catalyst under mild reaction conditions to obtain an overall yield of monomers up to 97%.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: January 24, 2017
    Assignee: Council of Scientific and Industrial Research
    Inventors: Paresh Laxmikant Dhepe, Ashutosh Anant Kelkar, Babasaheb Mansub Matsagar, Sandip Kumar Singh
  • PROCESS FOR DEPOLYMERIZATION OF LIGNIN
    Publication number: 20160168062
    Abstract: The present invention discloses a process for depolymerization of lignin to yield substituted phenolic monomers using Brönsted ionic liquid as catalyst under mild reaction conditions to obtain an overall yield of monomers up to 97%.
    Type: Application
    Filed: May 9, 2014
    Publication date: June 16, 2016
    Inventors: Paresh Laxmikant Dhepe, Ashutosh Anant Kelkar, Babasaheb Mansub Matsagar, Sandip Kumar Singh