This inventor holds 2 USPTO granted patents. Top assignee: E.i. Dupont De Nemours and Company. Active years: 1976-1979.
Company Filing History:
Years Active: 1976-1979
Title: The Innovations of Ernest Anton Stefancsik
Introduction
Ernest Anton Stefancsik is a notable inventor based in Flemington, NJ (US). He has made significant contributions to the field of pigments, particularly in the development of metalized azo pigments. With a total of two patents to his name, Stefancsik's work has had a considerable impact on industrial coatings.
Latest Patents
Stefancsik's latest patents include a process for preparing metalized azo pigments. This innovative method involves the preparation of aqueous-stable metalized azo pigment from 5-amino or 4-amino-2-chloro-toluene-5-sulfonic acid and 3-hydroxy-2-naphthoic acid with calcium and strontium salts. The process entails diazotizing one of the 2-chloro-5-amino-toluene-4-sulfonic acids, contacting the diazo with an inorganic salt of calcium, coupling the diazo with 3-hydroxy-2-naphthoic acid, and finally contacting the coupled diazo with an inorganic salt of strontium. The resulting metalized azo pigment exhibits high stability in aqueous coating compositions. Another significant patent involves the preparation of yellow azo pigment from dichloroaniline by coupling 2,4- or 2,5-dichloroaniline with barbituric acid. These pigments provide high color strength, hiding power, lightfastness, and bleed resistance, making them particularly useful in industrial finishes.
Career Highlights
Stefancsik is associated with E.I. DuPont de Nemours and Company, where he has been able to apply his innovative ideas in a corporate setting. His work has contributed to advancements in the field of pigments, enhancing the quality and performance of industrial coatings.
Collaborations
Throughout his career, Stefancsik has collaborated with notable colleagues, including Edward E. Jaffe and William J. Marshall. These collaborations have likely enriched his research and development efforts, leading to successful innovations in pigment technology.
Conclusion
Ernest Anton Stefancsik's contributions to the field of pigments through his patents and work at E.I. DuPont de Nemours and Company highlight his role as an influential inventor. His innovative processes for creating stable and effective pigments have made