This inventor holds 2 USPTO granted patents and 2 published patent applications. Top assignee: Air Products and Chemicals, Inc.. Active years: 1984-1997.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1984-1997
Title: Innovations of John Tze-Chiang Cheng
Introduction
John Tze-Chiang Cheng is a notable inventor based in Allentown, PA (US). He has made significant contributions to the field of polymer chemistry, holding a total of 2 patents. His work focuses on developing innovative solutions for various applications, particularly in the realm of absorbent materials and polymerization processes.
Latest Patents
One of Cheng's latest patents is for a liquid absorbent composition for nonwoven binder applications. This aqueous polymer composition comprises 10 to 40 wt % of a polymer in water, consisting essentially of 20-90 wt % α,β-ethylenically unsaturated carboxylic acid monomer and 10-80 wt % of one or more softening monomers. The composition is adjusted to a pH of 4-6 with alkali metal hydroxide or alkaline earth metal hydroxide and contains 0.1 to 3 wt % zirconium crosslinking salt. Such compositions can be applied to nonwoven and woven substrates to create superabsorbent products.
Another significant patent by Cheng addresses the reduction of wall fouling in the suspension polymerization of vinyl chloride. This invention relates to a method for minimizing wall fouling by wetting the surfaces of the polymerization reactor with a solution containing 5 to 50 wt % alkali metal hydroxide, 0.01 to 1 wt % free radical inhibitor, and 0.01 to 1 wt % surface active agent prior to charging the polymerization recipe. The wetted reactor surface is preferably heated to a temperature between 40°C and 100°C for at least 5 minutes before the polymerization recipe is introduced.
Career Highlights
John Tze-Chiang Cheng is currently employed at Air Products and Chemicals, Inc., where he continues to innovate and develop new technologies. His work has had a significant impact on the industry, particularly in enhancing the efficiency and effectiveness of polymer applications.
Collaborations
Cheng has collaborated with several notable colleagues, including Finn L Marten and Joel Erwin Goldstein. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
John Tze-Chiang Cheng is a distinguished inventor whose work in polymer chemistry has led to valuable innovations. His patents reflect a commitment
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile