Location History:
- Nagaokakyo, JP (1987 - 1994)
- Tokyo, JP (1996)
Company Filing History:
Years Active: 1987-1996
Title: Seiichi Sumi: Innovator in Silver Halide Photographic Materials
Introduction
Seiichi Sumi is a prominent inventor based in Nagaokakyo, Japan. He has made significant contributions to the field of photographic materials, particularly in the development of silver halide photographic photosensitive materials. With a total of eight patents to his name, Sumi's work has had a lasting impact on the industry.
Latest Patents
Sumi's latest patents include innovative formulations for silver halide photographic photosensitive materials. One of his notable inventions discloses a silver halide photographic photosensitive material that comprises a support and at least one hydrophilic colloid layer. This layer includes a photosensitive layer made of monodispersed silver halide grains with an average grain size of 0.2 microns or less, containing at least 90 mol % of silver chloride. Additionally, the photosensitive layer incorporates a hydrazine derivative and a water-dispersible fine particle polymer, optimizing the performance of the photographic material. Another patent presents a silver halide photographic photosensitive material featuring a transparent support and a silver halide emulsion photosensitive layer, along with a non-photosensitive layer that contains dyes. This invention ensures specific transmission densities for optimal photographic results.
Career Highlights
Seiichi Sumi is currently associated with Mitsubishi Paper Mills Limited, where he continues to innovate in the field of photographic materials. His extensive research and development efforts have led to advancements that enhance the quality and efficiency of photographic products.
Collaborations
Sumi has collaborated with notable colleagues in his field, including Yoshio Shibata and Kunihiro Nakagawa. Their combined expertise has contributed to the success of various projects and patents.
Conclusion
Seiichi Sumi's contributions to the field of silver halide photographic materials demonstrate his innovative spirit and dedication to advancing technology. His patents reflect a deep understanding of the complexities involved in photographic materials, ensuring that his work will continue to influence the industry for years to come.