The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2026
Filed:
Jun. 02, 2023
International Business Machines Corporation, Armonk, NY (US);
The Trustees of Columbia University IN the City of New York, New York, NY (US);
Luis M. Campos, New York, NY (US);
Dino Wu, New York, NY (US);
James L. Hedrick, Pleasanton, CA (US);
Nathaniel H. Park, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
The Trustees of Columbia University in the City of New York, New York, NY (US);
Abstract
Introduce into a reactor a polyurethane having a benzylic linkage. In one aspect, induce a chemical reduction through a reducing agent and a catalyst to depolymerize the polyurethane having the benzylic linkage. In another aspect, introduce hydrogen bromide into the reactor, and react the polyurethane with the hydrogen bromide to recover constituents of the polyurethane via acid-catalyzed bromine-substitution to cleave the benzylic linkage of the polyurethane.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile