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:
Nov. 04, 2025
Filed:
Mar. 30, 2022
Novomer, Inc., Rochester, NY (US);
Jonathan D. Tedder, Rochester, NY (US);
Alison M. Wilders, Rochester, NY (US);
Geoffrey W. Coates, Lansing, NY (US);
Catherine A. Falkner, Rochester, NY (US);
Novomer, Inc., Rochester, NY (US);
Abstract
Disclosed herein are compounds and methods useful as carbonylation catalysts that improve steric properties so that reaction with epoxide is improved, reaction with lactones is avoided, and polymer bonds to the metal centers are weakened, which facilitates faster ring closure, that improve stability of the carbonylation catalyst by not being susceptible to hydrolysis, which reduces side products and improves recovery yields of the carbonylation catalyst after using to make lactones, and that have improved steric and electron properties so that release time of a lactone product is minimized, which reduces side reactions.