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For the Inventor, By the Inventor

Tokyo, Japan

Makoto Okaji

This inventor holds 9 USPTO granted patents. Top assignee: Mitsubishi Paper Mills Limited. Active years: 1991-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Makoto Okaji. Retrieved from https://idiyas.com/inventor/makoto-okaji

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

USPTO Granted Patents = 9

% Patents Active = 88.9

Average Co-Inventor Count = 3.4

ph-index = 4

Forward Citations = 39(Granted Patents)


Location History:

  • Nagaokakyo, JP (1991)
  • Tsukuba, JP (1991 - 1992)
  • Tokyo, JP (1995 - 2003)

Company Filing History:

goldMedal9 out of 622 
 
Mitsubishi Paper Mills Limited
 patents

Years Active: 1991-2003

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9 patents (USPTO):Explore Patents
1. 6503673 - Phthalocyanine composition, process for production thereof, and electrophotographic photoreceptor (2003-01-07),
2. 6485658 - Phthalocyanine, process for producing the same and electrophotographic photoreceptor using the same (2002-11-26),
3. 6225015 - Oxytitanium phthalocyanine process for the production thereof and electrophotographic photoreceptor to which the oxytitanium phthalocyanine is applied (2001-05-01),
4. 5378568 - Electrophotographic photoreceptor containing an azo pigment (1995-01-03),
5. 5171651 - Electrophotographic photoreceptor with a carrier transport layer (1992-12-15),
6. 5089366 - Novel hydrazone compound in an electrophotographic receptor (1992-02-18),
7. 5041349 - Electrophotographic disazo photoreceptor (1991-08-20),
8. 5013623 - Electrophotographic photoreceptor with stilbene compound (1991-05-07),
9. 4999269 - Electrophotographic photoreceptor with bisazo compound (1991-03-12),

Title: The Innovations of Makoto Okaji

Introduction

Makoto Okaji is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of technology, particularly in the area of phthalocyanine compositions and electrophotographic photoreceptors. With a total of 9 patents to his name, Okaji continues to push the boundaries of innovation.

Latest Patents

His latest patents include a phthalocyanine composition and a process for its production, as well as an electrophotographic photoreceptor utilizing this composition. These patents disclose a phthalocyanine composition characterized by main diffraction peaks at 7.0°, 9.0°, 14.1°, 18.0°, 23.7°, and 27.3° of Bragg angles (2θ±0.2°) in an X-ray diffraction spectrum with Cu Kα. This innovative work has the potential to enhance the efficiency and effectiveness of electrophotographic processes.

Career Highlights

Okaji is currently employed at Mitsubishi Paper Mills Limited, where he applies his expertise to develop cutting-edge technologies. His work has not only advanced the company's research but has also contributed to the broader field of materials science.

Collaborations

Throughout his career, Okaji has collaborated with notable colleagues, including Akira Itoh and Kozo Haino. These partnerships have fostered a creative environment that encourages the exchange of ideas and the development of innovative solutions.

Conclusion

Makoto Okaji's contributions to the field of technology through his patents and collaborations highlight his role as a leading inventor. His work continues to inspire advancements in materials science and technology.

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]
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