Company Filing History:
Years Active: 1990-1997
Title: Biography of Inventor John D Hepworth
Introduction: John D Hepworth is a notable inventor based in Preston, GB. He has made significant contributions to the field of photochromic compounds, holding a total of four patents. His work has advanced the understanding and application of naphthopyran compounds.
Latest Patents: One of his latest patents includes innovations in photochromic naphthopyran compounds. This patent describes a naphthopyran compound of general formula (I), where R1 represents an alkyl group or an aryl group. Each of R4 and R5, which may be the same or different, independently represents an alkyl, alkenyl, carbocyclic, or heterocyclic group. Additionally, R4 and R5 can form a carbocyclic ring or a heterocyclic ring with the carbon atom to which they are attached.
Career Highlights: Throughout his career, John D Hepworth has been recognized for his innovative work in the field of chemistry. His patents have contributed to advancements in materials science and have practical applications in various industries.
Collaborations: John has collaborated with esteemed colleagues, including Martin Rickwood and Christopher D Gabbutt. These partnerships have fostered a creative environment that has led to groundbreaking discoveries in his field.
Conclusion: John D Hepworth's contributions to the field of photochrom