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For the Inventor, By the Inventor

Otake, Japan

Seiji Hayashi

This inventor holds 12 USPTO granted patents. Top assignee: Mitsubishi Rayon Company, Limited. Active years: 1990-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seiji Hayashi. Retrieved from https://idiyas.com/inventor/seiji-hayashi-b8rf84k5

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

Calculating rank
USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 5.3

ph-index = 6

Forward Citations = 135(Granted Patents)


Location History:

  • Kawasaki, JP (1990 - 1992)
  • Otake, JP (1995 - 2005)

Company Filing History:

goldMedal12 out of 1,357 
 
Mitsubishi Rayon Company, Limited
 patents

Years Active: 1990-2005

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12 patents (USPTO):Explore Patents
1. 6860922 - Hollow fiber membrane for the degassing of inks, ink degassing method, ink degassing apparatus, method for the fabrication of an ink cartridge, and ink (2005-03-01),
2. 6858063 - Hollow fiber membrane for the degassing of inks, ink degassing method, ink degassing apparatus, method for the fabrication of an ink cartridge, and ink (2005-02-22),
3. 6824261 - Hollow fiber membrane for the degassing of inks, ink degassing method, ink degassing apparatus, method for the fabrication of an ink cartridge, and ink (2004-11-30),
4. 6447679 - Hollow fiber membrane (2002-09-10),
5. 6114068 - Sheet for forming a polymer gelled electrolyte, a polymer gelled (2000-09-05),
6. 5540874 - Cellulose solution for shaping and method of shaping the same (1996-07-30),
7. 5413858 - Acrylic fiber and process for production thereof (1995-05-09),
8. 5164113 - Optical active compound and liquid crystal composition (1992-11-17),
9. 5149462 - Optically active compound (1992-09-22),
10. 5124069 - Optically active substance and liquid crystal composition comprising same (1992-06-23),
11. 5098599 - Optically active compound and liquid crystal composition (1992-03-24),
12. 4925591 - Mesomorphic compound having .beta.-hydroxycarboxyl group as chiral (1990-05-15),

Title: Innovations of Seiji Hayashi in Ink Degassing Technology

Introduction

Seiji Hayashi is a prominent inventor based in Otake, Japan, known for his significant contributions to ink degassing technology. With a total of 12 patents to his name, Hayashi has developed innovative solutions that enhance the quality and performance of ink products.

Latest Patents

Among his latest patents are the hollow fiber membrane for the degassing of inks, an ink degassing method, an ink degassing apparatus, and a method for the fabrication of an ink cartridge. His inventions focus on a gas-permeable hollow fiber membrane that features an inner diameter of 50 to 500 micrometers and a membrane thickness of 10 to 150 micrometers. This composite hollow fiber membrane consists of a three-layer structure, which includes a nonporous layer with porous layers on both sides. The technology allows for the effective removal of dissolved gases from ink by passing it through the hollow fibers and evacuating the outer surface. This method not only minimizes pressure loss during degassing but also ensures stable performance even with pressure fluctuations.

Career Highlights

Seiji Hayashi is associated with Mitsubishi Rayon Company, Limited, where he has been instrumental in advancing ink technology. His work has significantly impacted the efficiency and reliability of ink products in various applications.

Collaborations

Hayashi has collaborated with notable colleagues, including Keiichi Sakashita and Jun Nakauchi, contributing to the development of innovative solutions in the field of ink technology.

Conclusion

Seiji Hayashi's contributions to ink degassing technology exemplify the importance of innovation in enhancing product quality. His patents reflect a commitment to advancing the field and improving the performance of ink products.

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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