This inventor holds 3 USPTO granted patents. Top assignee: The Dow Chemical Company. Active years: 1992-1994.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1992-1994
Title: The Innovations of Robert A. Sewell
Introduction
Robert A. Sewell is a notable inventor based in Terneuzen, Netherlands. He has made significant contributions to the field of polyether polyols and polyurethane foam. With a total of 3 patents to his name, Sewell's work has had a lasting impact on the chemical industry.
Latest Patents
One of Sewell's latest patents involves a process for the preparation of polyether polyols with a reduced unsaturation content. This innovative method includes reacting an alkylene oxide, specifically propylene oxide, with an initiator that contains at least three active hydrogen atoms per molecule. The reaction is conducted in the presence of an alkoxylation catalyst, which can be barium, strontium, or their respective compounds. Additionally, a processing aid is utilized to enhance the quality of the polyether polyols produced.
Another significant patent pertains to the development of an isocyanate-terminated prepolymer. This prepolymer is created from a polyisocyanate, specifically 4,4'-methylene diphenyldiisocyanate, and a polyoxyalkylene polyol. The polyol used has an average functionality of 2 to 4 and a hydroxyl equivalent weight ranging from 2200 to 3500. This invention is particularly relevant in the manufacturing of flexible polyurethane foam.
Career Highlights
Robert A. Sewell is currently associated with The Dow Chemical Company, where he continues to innovate and contribute to advancements in chemical processes. His expertise in polyether polyols and polyurethane technology has positioned him as a key figure in his field.
Collaborations
Sewell has collaborated with notable colleagues, including Johan A. Thoen and Richard J. Elwell. These partnerships have further enhanced the scope and impact of his inventions.
Conclusion
Robert A. Sewell's contributions to the field of polyether polyols and polyurethane foam exemplify the spirit of innovation. His patents reflect a commitment to advancing chemical processes and improving product quality. His work continues to influence the industry and inspire future innovations.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile