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For the Inventor, By the Inventor

Utsunomiya, Japan

Toru Yamaguchi

This inventor holds 10 USPTO granted patents. Top assignee: Japan Styrene Paper Corporation. Active years: 1984-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toru Yamaguchi. Retrieved from https://idiyas.com/inventor/toru-yamaguchi-new9afge

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

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 3.9

ph-index = 8

Forward Citations = 151(Granted Patents)


Location History:

  • Tsukui, JP (1984)
  • Hiratsuka, JP (1985)
  • Utsunomiya, JP (1986 - 1991)

Company Filing History:

goldMedal10 out of 48 
 
Japan Styrene Paper Corporation
 patents

Years Active: 1984-1991

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10 patents (USPTO):Explore Patents
1. 5015667 - Pre-foamed beads of polyethylene base resin (1991-05-14),
2. 4889671 - Production method of prefoamed particles of polyolefin resin (1989-12-26),
3. 4756948 - Core material for automobile bumpers (1988-07-12),
4. 4716021 - Heat treatment apparatus for polyolefin resin particles (1987-12-29),
5. 4704239 - Process for the production of expanded particles of a polymeric material (1987-11-03),
6. 4656197 - Pre-foamed particles of polyethylene resin (1987-04-07),
7. 4568608 - Pre-foamed particles of polypropylene-base resin (1986-02-04),
8. 4504653 - Process for producing polyolefin resin particles (1985-03-12),
9. 4504601 - Process for producing pre-foamed particles of polypropylene resin (1985-03-12),
10. 4443393 - Method of pressurizing treatment of pre-foamed particles of polyolefin (1984-04-17),

Title: Toru Yamaguchi: Innovator in Polyethylene Technology

Introduction

Toru Yamaguchi is a prominent inventor based in Utsunomiya, Japan. He has made significant contributions to the field of polyethylene technology, holding a total of 10 patents. His innovative work focuses on enhancing the properties and production methods of polyethylene-based materials.

Latest Patents

Yamaguchi's latest patents include a method for forming pre-foamed beads of polyethylene base resin. This method involves crosslinking a starting polyethylene-base resin with a density greater than 0.940 g/cm³. The resulting pre-foamed beads exhibit a crosslinking degree of 10-45% gel content, providing molded articles with excellent rigidity, dimensional accuracy, and superb dimensional stability under heat. Another notable patent is for the production method of prefoamed particles of polyolefin resin. This process involves dispersing starting particles of polyolefin resin containing a volatile foaming agent in a dispersant within a pressure vessel. The mixture is heated to a temperature above the softening point of the starting particles, followed by the release of the particles and dispersant into a lower pressure atmosphere while feeding a heating liquid.

Career Highlights

Toru Yamaguchi is currently associated with Japan Styrene Paper Corporation, where he continues to innovate and develop new technologies. His work has significantly impacted the industry, particularly in the production of advanced polyethylene materials.

Collaborations

Yamaguchi has collaborated with notable coworkers, including Hideki Kuwabara and Shohei Yoshimura. Their combined expertise has contributed to the successful development of various innovative projects.

Conclusion

Toru Yamaguchi's contributions to polyethylene technology exemplify the spirit of innovation. His patents and ongoing work continue to influence the industry, showcasing the importance of research and development in material 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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