This inventor holds 3 USPTO granted patents. Top assignee: Ciba-Geigy Ag. Active years: 1988-1989.
Company Filing History:
Years Active: 1988-1989
Title: Innovations of John A. Clark
Introduction
John A. Clark is a notable inventor based in Altrincham, GB. He has made significant contributions to the field of holography, holding a total of 3 patents. His work focuses on the development of multicolor holograms and methods for preparing holograms, showcasing his expertise and innovative spirit.
Latest Patents
Clark's latest patents include a groundbreaking method for creating multicolor holograms using gelatin as the binder. This method allows for interference fringes to lie in layers parallel to the substrate, with colors visible by reflection in incident natural light. The process involves treating the holographic material, which has been holographically exposed and processed, to produce a hologram. By applying a specific solution to selected areas of the gelatin, the interference fringes can be permanently separated, resulting in a bathochromic shift in the replay wavelength. Another significant patent details a method of preparing a hologram, which includes subjecting holographic material to exposure and developing it in a silver halide developing solution. This innovative approach utilizes a silver halide bleaching agent to convert developed silver to silver chloride, followed by fixing out the silver chloride.
Career Highlights
John A. Clark has had a distinguished career, working with Ciba-Geigy AG, a company known for its advancements in chemical and pharmaceutical products. His work has contributed to the company's reputation for innovation in the field of holography.
Collaborations
Throughout his career, Clark has collaborated with notable colleagues, including David W. Butcher and Alan Adshead. These partnerships have fostered a creative environment that has led to significant advancements in their respective fields.
Conclusion
John A. Clark's contributions to holography and his innovative patents highlight his role as a leading inventor in the industry. His work continues to influence the development of new technologies in holography, showcasing the importance of innovation in scientific advancement.