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Hiroshi Nakazawa

This inventor holds 44 USPTO granted patents and 8 published patent applications and 3 EPO patents, primarily in Electrostatic Toner Development. Top assignees: Fuji Xerox Co., Ltd., Fujifilm Business Innovation Corp.. Active years: 1989-2025.

USPTO Granted Patents = 44 (Patent Applications = 8)

% Patents Active = 79.5

EPO Patents = 3 (Patent Applications = 1)

Average Co-Inventor Count = 4.5

ph-index = 7

Forward Citations = 212(Granted Patents)

Location History:

Minami-Ashigara-shi, JP (1999)
Minami-ashigara, JP (1994 - 2011)
Kanagawa, JP (1989 - 2024)

Company Filing History:

Fujifilm Business Innovation Corp.

patents

Years Active: 1989-2025

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Areas of Expertise:

Electrostatic Toner

Image Forming Method

Electrophotographic Developer

Production Method

Toner Cartridge

Electrostatic Charge

Image Developer

Color Toner

One-Component Developer

Mono-Component Developer

Image Forming Apparatus

Resin Particle Dispersion

44 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12222676 - Preparing method of electrostatic charge image developing toner, electrostatic charge image developing toner, and electrostatic charge image developer (2025-02-11),

2. 12111613 - Preparing method of electrostatic charge image developing toner and electrostatic charge image developing toner (2024-10-08),

3. 12105469 - Electrostatic charge image developing toner, electrostatic charge image developer, method for producing electrostatic charge image developing toner, toner cartridge, process cartridge, image forming apparatus, and image forming method (2024-10-01),

4. 12078959 - Method for producing toner for developing electrostatic charge image, and toner for developing electrostatic charge image (2024-09-03),

5. 12066789 - Method for producing toner for developing electrostatic charge image, toner for developing electrostatic charge image, and electrostatic charge image developer (2024-08-20),

6. 11892800 - Method for producing toner for electrostatic charge image development, toner for electrostatic charge image development, and electrostatic charge image developer (2024-02-06),

7. 11675285 - Electrostatic image developing toner, method for producing electrostatic image developing toner, electrostatic image developer, toner cartridge, process cartridge, and image forming apparatus (2023-06-13),

8. 11586120 - Toner for developing electrostatic charge image, electrostatic charge image developer, method for producing toner for developing electrostatic charge image, toner cartridge, process cartridge, image forming apparatus, and image forming method (2023-02-21),

9. 8563208 - Electrostatic charge image developing toner and method of producing the same, electrostatic charge image developer, toner cartridge, process cartridge, and image forming device (2013-10-22),

10. 8512926 - Electrophotographic toner, electrophotographic developer, toner cartridge, and image forming method (2013-08-20),

11. 8431301 - Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, and image forming apparatus (2013-04-30),

12. 8329375 - Electrostatic charge image developing toner and method of producing the same, electrostatic charge image developer, toner cartridge, process cartridge, and image forming device (2012-12-11),

13. 8021813 - Electrostatic-image-developing toner, method of producing the same, electrostatic image developer, image forming method and image forming apparatus (2011-09-20),

14. 7951519 - Toner for development of electrostatic image, method for manufacturing the same, developer for development of electrostatic image, toner cartridge, process cartridge, and image forming apparatus (2011-05-31),

15. 7901857 - Electrostatic latent image developing toner, production method thereof, electrostatic latent image developer, and image forming method (2011-03-08),

Title: Innovator Hiroshi Nakazawa: Pioneering the Future of Electrostatic Toner Technologies

Introduction

Hiroshi Nakazawa, based in Minami-ashigara, Japan, is a prominent inventor with an impressive portfolio of 44 patents. His innovative contributions primarily focus on the fields of electrostatic charge image developing toners, essential for printing technologies. His work showcases his dedication to advancing imaging solutions that enhance the quality and efficiency of printed materials.

Latest Patents

Among Nakazawa's latest notable patents are the "Preparing Method of Electrostatic Charge Image Developing Toner," "Electrostatic Charge Image Developing Toner," and "Electrostatic Charge Image Developer." These patents detail a sophisticated method for preparing electrostatic charge image developing toners, which involves aggregating binder resin and release agent particles within a dispersion. The process includes heating and coalescing the aggregated particles, followed by filtering and cleaning to yield high-quality toner particles. A unique feature of his preparation method is the addition of a polymer dispersant, which ensures that the dispersion maintains optimal quality during aggregation.

Career Highlights

Nakazawa's career is highlighted by his experience at prestigious companies, including Fuji Xerox Co., Ltd. and Fujifilm Business Innovation Corp. His work at these organizations has played a significant role in shaping modern printing technologies and developing innovative toner solutions that have paved the way for advancements in the field.

Collaborations

Throughout his career, Nakazawa has collaborated with notable colleagues such as Masanobu Ninomiya and Shuji Sato. Their combined expertise has contributed to a wealth of knowledge in electrostatic charge imaging, fostering innovation within the company and leading to the successful development of various patented technologies.

Conclusion

Hiroshi Nakazawa's extensive experience and contributions to the field of electrostatic toners exemplify the profound impact of innovation on the printing industry. His patents not only reflect his technical prowess but also his commitment to enhancing the capabilities of imaging technologies. As he continues to push the boundaries of what is possible, Nakazawa remains a key figure in the pursuit of excellence in electrostatic developing toners.

Profile summary based on public USPTO records.

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