This inventor holds 2 USPTO granted patents. Top assignees: Ciba-Geigy Ag, Ilford Limited. Active years: 1976-1977.
Company Filing History:
Years Active: 1976-1977
Title: John Douglas Ballantine: Innovator in Photographic Materials
Introduction
John Douglas Ballantine is a notable inventor based in Ilford, GB. He has made significant contributions to the field of photographic materials, particularly through his innovative methods for producing hardened gelatin layers. With a total of 2 patents, Ballantine's work has had a lasting impact on the industry.
Latest Patents
Ballantine's latest patents include the production of hardened gelatin layers by the addition of quaternary carbamoyl pyridinium compounds. This invention relates specifically to the hardening of silver halide photographic material. Another significant patent involves a method of producing a hardened gelatin layer using an aqueous solution of a 2-halogeno pyridinium compound. This method focuses on heating gelatin with the solution to achieve the desired hardening effect.
Career Highlights
Throughout his career, Ballantine has worked with prominent companies such as Ciba-Geigy AG and Ilford Limited. His experience in these organizations has allowed him to refine his expertise in the development of photographic materials and processes.
Collaborations
One of his notable coworkers is Norman A. Smith, with whom he has collaborated on various projects related to photographic technology.
Conclusion
John Douglas Ballantine's contributions to the field of photographic materials through his innovative patents and career achievements highlight his importance as an inventor. His work continues to influence the industry today.