This inventor holds 3 USPTO granted patents, plus 1 CIPO patent. Top assignee: Nova Chemicals (International) S.a.. Active years: 1999-2002.
Company Filing History:
Years Active: 1999-2002
Title: Jeff C Stewart: Innovator in Polymerization Technology
Introduction
Jeff C Stewart is a notable inventor based in Windsor, CA. He has made significant contributions to the field of polymer chemistry, particularly in the development of catalysts for high molecular weight ethylene copolymers. With a total of 3 patents to his name, Stewart's work has advanced the understanding and application of polymerization processes.
Latest Patents
Stewart's latest patents include innovative solutions for polymerization catalysts. One of his notable inventions is a polymerization catalyst having a phosphinimine ligand. This invention outlines a solution process for preparing high molecular weight ethylene copolymers by contacting olefin monomers with a catalyst system at a polymerization temperature of 80°C or higher. The catalyst system comprises an unbridged Group 4 metal compound with a monocyclopentadienyl ligand, a phosphinimine ligand, and at least one uninegative, activation reactive ligand. This process can be practiced at elevated temperatures to achieve high number average molecular weight polymers.
Another significant patent is the high-temperature solution polymerization process with phosphinimine. Similar to his previous invention, this patent details a solution process for the preparation of high molecular weight ethylene copolymers. The catalyst system and conditions are consistent with his earlier work, emphasizing the importance of temperature in achieving desired polymer characteristics.
Career Highlights
Jeff C Stewart is currently associated with Nova Chemicals, an international leader in the chemical industry. His role at the company allows him to leverage his expertise in polymer chemistry to drive innovation and improve product offerings. Stewart's work has not only contributed to the company's success but has also positioned him as a key figure in the field of polymerization technology.
Collaborations
Throughout his career, Stewart has collaborated with esteemed colleagues, including Douglas W Stephan and Stephen John Brown. These collaborations have fostered a productive environment for innovation and have led to advancements in polymer chemistry.
Conclusion
Jeff C Stewart's contributions to polymerization technology through his patents and work at Nova Chemicals highlight his role as an influential inventor in the field. His innovative approaches to catalyst development continue to shape the future of polymer chemistry.