Company Filing History:
Years Active: 1983-1994
Title: Innovator Spotlight: Tzu-Ching Chang and His Contributions to Chemical Processes
Introduction: Tzu-Ching Chang, based in Wilmington, DE, is an accomplished inventor with a significant focus on chemical processes. With a total of three patents to his name, he has made notable advancements in the field of chemistry, specifically in the preparation and separation of chemical compounds.
Latest Patents: Chang’s latest patents include innovative processes that showcase his expertise in chemical reactions. One of his key inventions is a process for preparing thiabendazole, which involves the acid-catalyzed condensation of o-phenyldiamine and 4-cyanothiazole in various solutions. This method highlights the interaction of water and miscible co-solvents to create an effective chemical reaction. Another significant patent details a process for separating amines using preferential aqueous salt extraction. This method efficiently separates amines with differing basicity constants through the conversion of the more reactive amine into a salt that is extracted with water. This innovative separation technique not only recycles amines but also allows for the reuse of sulfur dioxide in the generation of amine sulfite.
Career Highlights: Tzu-Ching Chang is currently employed at E.I. DuPont de Nemours and Company, known for its innovative solutions in the science and technology sector. His work at the company has positively impacted the field of chemistry through his inventive contributions to chemical preparation and separation processes.
Collaborations: Throughout his career, Chang has collaborated with notable coworkers, including Patti Ann Parziale and Lynn E. Applegate. These partnerships have fostered an environment of innovation and creativity, driving advancements in their respective projects.
Conclusion: Tzu-Ching Chang's contributions to the field of chemistry through his patents reflect his ingenuity and dedication as an inventor. His innovative processes not only enhance chemical preparations but also improve separation techniques, showcasing the significant impact of his work at E.I. DuPont de Nemours and Company. With a passion for innovation, Chang continues to pave the way for future advancements in the field.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.