Company Filing History:

12 out of 386

Toda Kogyo Corporation

patents

2 out of 1,038

Nippon Electric Co., Ltd.

patents

Years Active: 1976-1992

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5133805 - Plate-like hematite particles, a pigment comprising the same and showing (1992-07-28),

2. 4851292 - Plate-like barium ferrite particles suitable for use in magnetic (1989-07-25),

3. 4806429 - Plate-like barium ferrite particles suitable for use in magnetic (1989-02-21),

4. 4781981 - Plate-like magnetoplumbite ferrite particles for magnetic recording and (1988-11-01),

5. 4752407 - Process for producing plate-like barium ferrite particles (1988-06-21),

6. 4698182 - Hexagonal plate-like barium ferrite particles for magnetic recording and (1987-10-06),

7. 4585568 - Plate-like barium ferrite particles for magnetic recording and process (1986-04-29),

8. 4584242 - Plate-like barium ferrite particles for magnetic recording and process (1986-04-22),

9. 4561988 - Process for production of plate-like barium ferrite particles for (1985-12-31),

10. 4548801 - Plate-like barium ferrite particles for use in magnetic recording and (1985-10-22),

11. 4539129 - Barium ferrite particles and process for producing said particles (1985-09-03),

12. 4529524 - Process for producing plate-like barium ferrite particles for magnetic (1985-07-16),

13. 4119536 - Method of disposing of a ferrous-ion containing acidic aqueous waste by (1978-10-10),

14. 3963630 - Lead zirconate-titanate powder of particle sizes between 0.02 and 0.2 (1976-06-15),

Title: Masao Kiyama: Innovator in Hematite and Barium Ferrite Technologies

Introduction

Masao Kiyama is a prominent inventor based in Kyoto, Japan, known for his significant contributions to the fields of materials science and engineering. With a total of 14 patents to his name, Kiyama has made remarkable advancements in the development of specialized particles used in various applications.

Latest Patents

Kiyama's latest patents include innovations such as plate-like hematite particles, which possess an average particle diameter ranging from 0.5 to 5.0 micrometers and a lamellar thickness of 50 to 500 angstroms. These particles exhibit a unique plate ratio, contributing to their effectiveness as an iron oxide pigment that displays a golden color. Additionally, he has developed plate-like barium ferrite particles suitable for magnetic applications. These particles feature a solid solution of zinc on their surface and have specific characteristics, including an average particle diameter of less than 0.1 micrometers and a coercive force ranging from 300 to 1,500 Oe.

Career Highlights

Throughout his career, Masao Kiyama has worked with notable companies such as Toda Kogyo Corporation and Nippon Electric Co., Ltd. His work has significantly impacted the development of advanced materials, particularly in the realm of pigments and magnetic particles.

Collaborations

Kiyama has collaborated with esteemed colleagues, including Toshio Takada and Norimichi Nagai, contributing to the advancement of innovative technologies in his field.

Conclusion

Masao Kiyama's contributions to materials science through his patents and collaborations highlight his role as a leading inventor in Japan. His work continues to influence various industries, showcasing the importance of innovation in technology.

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