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For the Inventor, By the Inventor

Hino, Japan

Kaoru Iwata

This inventor holds 18 USPTO granted patents, primarily in Optical Materials. Top assignees: Teijin Limited, Bayer Aktiengesellschaft, Other. Active years: 1976-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kaoru Iwata. Retrieved from https://idiyas.com/inventor/kaoru-iwata

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

Calculating rank
USPTO Granted Patents = 18

% Patents Active = 88.9

Average Co-Inventor Count = 3.9

ph-index = 10

Forward Citations = 231(Granted Patents)


Location History:

  • Hino, JA (1976)
  • Hino, JP (1981 - 2002)
  • Hachioji, JP (1983 - 2005)

Company Filing History:

goldMedal16 out of 1,605 
 
Teijin Limited
 patents
silverMedal1 out of 12,269 
 
Bayer Aktiengesellschaft
 patents
bronzeMedal2 out of 834,659 
Other
 patents
where one patent can have more than one assignee

Years Active: 1976-2005

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Areas of Expertise:
Optical Film
Cyclic Olefin Polymer
Polycarbonate Film
Hydrogenated Copolymer
Aromatic Polyethersulfone
Acylated Cellulose Film
Naphthalocyanine Compound
Visible Light-Sensitive Polyester
Selective Light-Transmitting Structure
Melamine Group-Acrylate
Organic Nonlinear Optical Substance
Sulfur Compound-Coordinate Bond
18 patents (USPTO):Explore Patents
1. 6881453 - Optical film (2005-04-19),
2. 6476153 - Process for producing hydrogenated &agr;-olefin-dicyclopentadiene copolymer, method for molding the same and optical material (2002-11-05),
3. 6388032 - Cyclic olefin polymer containing little catalyst residue (2002-05-14),
4. 6232407 - Process for producing hydrogenated &agr;-olefin-dicyclopentadiene copolymer, method for molding the same and optical material (2001-05-15),
5. 6191243 - &agr;-olefin-cycloolefin copolymers and process for their production (2001-02-20),
6. 5958305 - Film of aromatic polyethersulfone, process for the production thereof, (1999-09-28),
7. 5759449 - Film of aromatic polyethersulfone, process for the production thereof, (1998-06-02),
8. 5695694 - Method of producing an acylated cellulose film (1997-12-09),
9. 5645766 - Film of aromatic polyethersulfone process for the production thereof and (1997-07-08),
10. 5561180 - Polycarbonate film for optical purposes and a production process thereof (1996-10-01),
11. 5478518 - Polycarbonate film for optical purposes and a production process thereof (1995-12-26),
12. 5268478 - Sulfur compound-coordinate bonded organic coloring matter, compositions (1993-12-07),
13. 5196147 - Organic nonlinear optical substance (1993-03-23),
14. 5009986 - Naphthalocyanine based compound and optical recording medium containing (1991-04-23),
15. 4495343 - Visible light-sensitive polyester polymer and visible light-sensitive (1985-01-22),

Title: The Innovative Mind of Kaoru Iwata

Introduction

Kaoru Iwata, an accomplished inventor based in Hino, Japan, has made significant strides in the realm of optical materials, holding a total of 18 patents to his name. His work has not only advanced technology in various fields but also laid the groundwork for future innovations.

Latest Patents

Among his latest contributions is an innovative optical film that boasts a unique composition as a single polymer film. This film demonstrates a smaller phase difference as the wavelength decreases, crafted from an olefin-based polymer featuring an alicyclic group in its side chain. The alicyclic group constitutes 60 to 90 wt % of the polymer, and it meets specific phase difference criteria at wavelengths of 450 nm and 550 nm. Additionally, Iwata developed a process for producing hydrogenated α-olefin-dicyclopentadiene copolymer, which involves the distillation of unreacted compounds in a specialized hydrocarbon solvent. He also proposed methods for molding this copolymer into optical materials, showcasing his commitment to enhancing material science.

Career Highlights

Throughout his professional journey, Kaoru Iwata has excelled in his roles, particularly during his time at Teijin Limited. His contributions to the company and the broader field of optical materials have been groundbreaking, solidifying his position as a leading inventor in this domain.

Collaborations

Iwata has collaborated with notable peers, including Hideaki Nitta and Takeshi Sasaki. These partnerships have propelled his innovative projects forward, fostering a collaborative spirit that is essential for technological advancement.

Conclusion

Kaoru Iwata's work in the field of optical materials underscores the importance of innovation and collaboration in driving technological progress. With his impressive portfolio of patents and a dedication to his craft, Iwata continues to inspire future generations of inventors and researchers.

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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