This inventor holds 5 USPTO granted patents. Top assignee: Ciba-Geigy Corporation. Active years: 1984-1993.
Location History:
- Ettingen, CH (1984)
- Marly, CH (1989 - 1993)
Company Filing History:
Years Active: 1984-1993
Title: The Innovations of Henri Dubas
Introduction
Henri Dubas is a notable inventor based in Marly, Switzerland. He has made significant contributions to the field of photographic materials, particularly in the stabilization of magenta couplers. With a total of 5 patents to his name, Dubas has established himself as a key figure in his area of expertise.
Latest Patents
Among his latest patents, Dubas has developed substituted benzophenone stabilizers. These compounds, characterized by the formula ##STR1##, where R is hydrogen or hydroxyl, R.sub.1 is alkyl, alkoxy, amino, or aryl, and R.sub.2 is hydrocarbylcarbonyl or hydrocarbylsulfonyl, are highly suitable for stabilizing magenta couplers in photographic materials. Additionally, he has patented a process for stabilizing magenta couplers and the corresponding image, utilizing similar compounds to enhance the stability of photographic materials.
Career Highlights
Henri Dubas has been associated with Ciba-Geigy Corporation, a prominent company in the chemical and pharmaceutical industry. His work has focused on innovative solutions that improve the quality and longevity of photographic products.
Collaborations
Throughout his career, Dubas has collaborated with notable colleagues, including David G Leppard and David H Steinberg. These partnerships have contributed to the advancement of his research and the successful development of his patents.
Conclusion
Henri Dubas is a distinguished inventor whose work has significantly impacted the field of photographic materials. His innovative patents and collaborations highlight his dedication to advancing technology in this area.