Patents by Inventor Alva Woo

Alva Woo 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).

  • Publication number: 20230235100
    Abstract: Provided in this disclosure are zirconium and hafnium complexes that contain 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one other ligand. The use of such a complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene).
    Type: Application
    Filed: April 16, 2021
    Publication date: July 27, 2023
    Applicant: NOVA CHEMICALS (INTERNATIONAL) S.A.
    Inventors: Xiaoliang Gao, Charles Carter, P. Scott Chisholm, Janelle Smiley-Wiens, Darryl Morrison, Alva Woo, Cheng Fan, Chia Yun Chang, Frederick Chiu