Masao Nakagawa

This inventor holds 14 USPTO granted patents. Top assignees: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Kanegafuchi Chemical Industry Co., Ltd.. Active years: 1976-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Nakagawa. Retrieved from https://idiyas.com/inventor/masao-nakagawa

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

USPTO Granted Patents = 14

% Patents Active = 100.0

Average Co-Inventor Count = 1.7

ph-index = 5

Forward Citations = 87(Granted Patents)

Location History:

Takasago, JA (1976)
Takasago, JP (1983 - 1984)
Kobe, JP (1984 - 1988)

Company Filing History:

13 out of 698

Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

patents

1 out of 109

Kanegafuchi Chemical Industry Co., Ltd.

patents

Years Active: 1976-1988

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4746706 - Polyolefin particles and process for preparing the same (1988-05-24),

2. 4722944 - Expandable particles of vinyl chloride resin composition for (1988-02-02),

3. 4721731 - Process for preparing expandable particles of vinyl chloride resin (1988-01-26),

4. 4703066 - Polyolefin particles and process for preparing the same (1987-10-27),

5. 4665102 - Polyolefin particles and process for preparing the same (1987-05-12),

6. 4618663 - Process for preparing .alpha.-methylstyrene-acrylonitrile copolymers (1986-10-21),

7. 4560735 - Process for preparing copolymer (1985-12-24),

8. 4539335 - Expandable thermoplastic resin particles and process for preparing the (1985-09-03),

9. 4438222 - Heat resistant expandable plastic particles and molded articles produced (1984-03-20),

10. 4433029 - Expandable thermoplastic polymer beads with method of producing same (1984-02-21),

11. 4430450 - Expandable thermoplastic polymer particles and process for producing the (1984-02-07),

12. 4424286 - Expanded shaped article comprising a heat resistant synthetic resin (1984-01-03),

13. 4368218 - Method of making expandable thermoplastic polymer beads (1983-01-11),

14. 3960787 - Process for preparing foamable synthetic resin granules (1976-06-01),

Title: Masao Nakagawa: Pioneering Innovations in Polyolefin and Vinyl Chloride Resins

Introduction: Masao Nakagawa, an accomplished inventor based in Kobe, Japan, holds a remarkable portfolio of 14 patents. His innovative contributions to materials science have paved the way for advancements in polyolefin and vinyl chloride resin applications.

Latest Patents: Among Nakagawa's notable inventions are his recent patents focusing on polyolefin particles and expandable vinyl chloride resin compositions. One significant patent outlines a novel process for preparing polyolefin particles with a halogenated surface region, achieved by irradiating ultraviolet rays onto an aqueous dispersion of polyolefin particles in the presence of a halogen gas. This innovation greatly enhances the ability of these particles to retain volatile blowing agents, leading to expandable particles with improved storability. Another important patent describes an expandable particle of vinyl chloride resin composition designed for bead-foaming. This formulation details specific proportions of vinyl chloride resin and acrylic resin, along with volatile organic blowing agents, enabling the production of foamed articles that can be molded into complex shapes with smooth surfaces and high expansion ratios.

Career Highlights: Throughout his career, Masao Nakagawa has been associated with prominent companies, including Kanegafuchi Kagaku Kogyo Kabushiki Kaisha and Kanegafuchi Chemical Industry Co., Ltd. His work in these organizations has significantly impacted the development of cutting-edge materials employed in various industries.

Collaborations: Nakagawa has collaborated with esteemed colleagues such as Tatehiko Nishida and Kiyoshi Mori. Their collective expertise has contributed to the success of many of Nakagawa's pioneering projects, further underscoring the importance of teamwork in the realm of innovation.

Conclusion: Masao Nakagawa's enduring legacy as an inventor is marked by his collection of patents that continue to influence the fields of materials science and engineering. His relentless pursuit of innovative solutions enables advancements that benefit various applications, securing his place as a key figure in the realm of invention.

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]