Sadatugu Terada

This inventor holds 16 USPTO granted patents. Top assignees: Konishiroku Photo Industry Co., Ltd., Hokuetsu Paper Mills, Ltd.. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sadatugu Terada. Retrieved from https://idiyas.com/inventor/sadatugu-terada

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 16

% Patents Active = 100.0

Average Co-Inventor Count = 4.9

ph-index = 6

Forward Citations = 108(Granted Patents)

Location History:

Hino, JA (1976)
Hachoiji, JP (1979)
Hachioji, JP (1978 - 1984)
Hino, JP (1979 - 1985)

Company Filing History:

16 out of 1,252

Konishiroku Photo Industry Co., Ltd.

patents

1 out of 10

Hokuetsu Paper Mills, Ltd.

patents

where one patent can have more than one assignee

Years Active: 1976-1985

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4507378 - Method for the production of toner for electrophotography and the toner (1985-03-26),

2. 4486559 - Toner composition for the development of electrostatic latent images and (1984-12-04),

3. 4450221 - Encapsulated lyophilic magnetic particle and resin toner (1984-05-22),

4. 4448871 - Toner for developing an electrostatically charged image and (1984-05-15),

5. 4415644 - Electrostatic image developing toner and a method for the production (1983-11-15),

6. 4353979 - Light-sensitive silver halide photographic materials (1982-10-12),

7. 4272601 - Coated developer carrier for electrophotography (1981-06-09),

8. 4242444 - Process for the preparation of light-sensitive silver halide (1980-12-30),

9. 4200465 - Antistatic light-sensitive silver halide photographic element (1980-04-29),

10. 4192683 - Photographic light-sensitive material (1980-03-11),

11. 4154615 - Color diffusion transfer unit with polymeric quaternary nitrogen mordant (1979-05-15),

12. 4149890 - Diffusion transfer photographic material with fluorine containing (1979-04-17),

13. 4142899 - Color diffusion transfer photographic unit (1979-03-06),

14. 4138257 - Process for the treatment of photographic materials (1979-02-06),

15. 4118231 - Light-sensitive silver halide photographic materials containing (1978-10-03),

Title: The Innovations of Sadatugu Terada

Introduction

Sadatugu Terada is a notable inventor based in Hino, Japan. He has made significant contributions to the field of electrophotography, holding a total of 16 patents. His work has advanced the technology used in toner production, which is essential for printing and imaging processes.

Latest Patents

Among his latest patents, Terada has developed a method for the production of toner for electrophotography. This invention involves polymerizing an aqueous suspension of a monomer in the presence of a dispersant, which is selected from orthophosphate, pyrophosphate, and polyphosphate, along with a colorant and an anionic surfactant. The polymerization product is treated with dilute acid and rinsed with water to remove the dispersant from the final product. Additionally, he has created a toner composition for the development of electrostatic latent images, which includes a polymer obtained by polymerizing a polymerizable monomer in the presence of a chlorinated polyolefin.

Career Highlights

Throughout his career, Terada has worked with prominent companies such as Konishiroku Photo Industry Co., Ltd. and Hokuetsu Paper Mills, Ltd. His experience in these organizations has allowed him to refine his expertise in toner technology and electrophotography.

Collaborations

Some of his notable coworkers include Masao Ishihara and Kiyoshi Tamaki. Their collaboration has contributed to the innovative advancements in the field of imaging technology.

Conclusion

Sadatugu Terada's contributions to toner production and electrophotography have made a lasting impact on the industry. His innovative patents and collaborations with esteemed colleagues highlight his dedication to advancing technology in this field.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]