Company Filing History:

13 out of 1,252

Konishiroku Photo Industry Co., Ltd.

Years Active: 1976-1991

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5041667 - Process for producing chlorophenylhydrazine compounds (1991-08-20),

2. 4960686 - Silver halide photographic light-sensitive material containing oxonol dye (1990-10-02),

3. 4356258 - Silver halide color photographic material containing yellow coupler (1982-10-26),

4. 4314023 - Photographic silver halide materials containing yellow coupler (1982-02-02),

5. 4304845 - Silver halide photographic materials containing photographic yellow (1981-12-08),

6. 4289847 - Method of forming dye image (1981-09-15),

7. 4275148 - Light-sensitive silver halide color photographic materials (1981-06-23),

8. 4189321 - Process for forming magenta dye images (1980-02-19),

9. 4070191 - Silver halide emulsion containing colored magenta coupler for photography (1978-01-24),

10. 4057432 - Acylacetanilide coupler with heterocyclic diacyl amino coupling-off group (1977-11-08),

11. 4012258 - Process for forming color photographic images (1977-03-15),

12. 4009035 - Process for forming cyan dye photographic images (1977-02-22),

13. 4008086 - Silver halide emulsion containing photographic yellow coupler (1977-02-15),

14. 3973968 - Photographic acyl acetanilide color couplers with (1976-08-10),

Title: The Innovative Contributions of Tamotsu Kojima

Introduction

Tamotsu Kojima, an esteemed inventor based in Hino, Japan, has made significant contributions to the fields of chemistry and photography through his extensive work and innovative spirit. With a remarkable portfolio of 14 patents, his inventions have paved the way for advancements in agricultural and photographic materials.

Latest Patents

Among Tamotsu Kojima's latest patents, noteworthy innovations include a method for producing chlorophenylhydrazine compounds. This process allows for the chlorination of hydrogen atoms on the phenyl nucleus in beta-imidated phenylhydrazine compounds, followed by hydrolysis of the chlorinated product. The resulting chlorophenylhydrazine compound serves as an essential starting material for the creation of herbicides, insecticides, and photographic couplers, all produced with high yield and minimal cost.

Another significant patent involves the development of silver halide photographic light-sensitive materials containing oxonol dyes. This innovation highlights a complex formula allowing for multiple substituents that improve the material's water solubility and functionality.

Career Highlights

Throughout his career, Tamotsu Kojima has been affiliated with prominent companies such as Konishiroku Photo Industry Co., Ltd. and Konica Corporation. His work in these companies has been instrumental in shaping new technologies and methodologies within the industry.

Collaborations

Tamotsu has had the privilege of collaborating with esteemed colleagues, notably Takaya Endo and Mitsuto Fujiwhara. These collaborations have enriched his projects and contributed to successful outcomes in their shared pursuits.

Conclusion

Tamotsu Kojima's legacy as an inventor is marked by his pioneering patents and fruitful collaborations. His contributions continue to influence advancements in chemistry and photography, solidifying his position as a noteworthy figure in the world of inventions.

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Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.