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:
Mar. 22, 2022
Filed:
Jun. 20, 2019
Applicant:
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Inventors:
Charles J. Harlan, Houston, TX (US);
Matthew W. Holtcamp, Huffman, TX (US);
Subramaniam Kuppuswamy, Mont Belvieu, TX (US);
Steven C. Haas, Manvel, TX (US);
Assignee:
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 17/00 (2006.01);
U.S. Cl.
CPC ...
C07F 17/00 (2013.01);
Abstract
A process to synthesize a Group 4 ansa-metallocene. The process includes reacting an alkaline earth metal dianion dicyclopentadiene ligand-Lewis base complex with a Group 4 metal tetrahalide in the presence of an alkali metal halide, and forming the Group 4 ansa-metallocene dihalide with high yield and purity.