This inventor holds 1 USPTO granted patent. Top assignee: A E Staley Manufacturing Company. Active years: 1987.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1987
Title: John D. Downs and His Polyester Preparation Process
Introduction
John D. Downs was an inventor associated with A. E. Staley Manufacturing Company in Decatur, Illinois. His patent work addressed the preparation of glycoside-containing polyester products with improved color characteristics.
Latest Patents
Downs is credited with 1 patent: “Glycoside-Containing Polyester Preparation Process.” The process reacts a polyol containing at least a minor proportion of a glycoside reactant with a lower alkyl ester of a polybasic acid. Compared with using the corresponding acid or anhydride, this approach improves the color of the resulting polyester. The improvement is especially pronounced when the polyester includes an aromatic polybasic acid and its lower alkyl ester is used in the reaction.
Career Highlights
Downs’s documented patent contribution reflects work on polyester chemistry and manufacturing processes. The invention focused on improving product color through the selection of reactants used during polyester preparation.
Collaborations
Downs’s listed coworkers include Kenneth B. Moser and C. Deane Roth. His patent is associated with A. E. Staley Manufacturing Company.
Conclusion
John D. Downs’s patent describes a practical chemical process for producing glycoside-containing polyesters with improved color, particularly when aromatic acid esters are used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile