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For the Inventor, By the Inventor

Hitachi, Japan

Masahiro Ono

This inventor holds 11 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1984-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Ono. Retrieved from https://idiyas.com/inventor/masahiro-ono-tztrvh0l

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 5.7

ph-index = 4

Forward Citations = 44(Granted Patents)


Company Filing History:

goldMedal11 out of 42,740 
 
Hitachi, Ltd.
 patents

Years Active: 1984-1993

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11 patents (USPTO):Explore Patents
1. 5223594 - Flame-retardant resin composition containing a bromostyrene prepolymer (1993-06-29),
2. 5212244 - Thermosetting resin composition, and prepreg and laminated sheet which (1993-05-18),
3. 5080965 - Prepreg from poly(p-hydroxystyrene), epoxy-modified polybutadiene and (1992-01-14),
4. 5041478 - Resin composition for printed circuit board (1991-08-20),
5. 4946734 - Resin composition for printed circuit board and such board formed by use (1990-08-07),
6. 4931507 - Composition comprising poly(p-hydroxystrene) derivative, epoxy-modified (1990-06-05),
7. 4784917 - Thermosetting resin composition and laminate and process for the (1988-11-15),
8. 4738900 - Thermo-setting, polymerizable composition and wiring board (1988-04-19),
9. 4607094 - Thermosetting resin composition from aromatic cyanamide (1986-08-19),
10. 4587162 - Resin composition and laminate produced therefrom comprising a cyclized (1986-05-06),
11. 4486583 - Heat-resistant resin from aromatic cyanamide compound and aromatic amine (1984-12-04),

Title: Masahiro Ono: Innovator in Flame-Retardant Resin Technology

Introduction

Masahiro Ono is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of materials science, particularly in the development of flame-retardant resin compositions. With a total of 11 patents to his name, Ono's work has had a substantial impact on the industry.

Latest Patents

One of his latest patents is focused on a flame-retardant resin composition that contains a bromostyrene prepolymer. This innovative composition is characterized by a prepolymer represented by a specific general formula, where R1 stands for a hydrogen atom or an unreactive saturated group, and R2 represents a reactive unsaturated group. The parameters m and n are defined as positive numbers ranging from 1 to 4, while X and Y denote copolymerization ratios that fall between 0.3 and 0.7, ensuring that their total equals 1. This flame-retardant resin composition is notable for its uniform crosslinking density and minimal stress concentration, making it ideal for producing laminates for multilayer printed wiring boards that require high thermal impact resistance and excellent heat resistance.

Career Highlights

Masahiro Ono has dedicated his career to advancing materials technology at Hitachi, Ltd. His innovative approaches have led to the development of various high-performance materials that meet the demands of modern applications.

Collaborations

Ono has collaborated with notable colleagues, including Akio Takahashi and Toshikazu Narahara, to further enhance the research and development of flame-retardant materials.

Conclusion

Masahiro Ono's contributions to the field of flame-retardant resin technology exemplify his commitment to innovation and excellence. His work continues to influence the industry and pave the way for future advancements in materials science.

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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