logo

For the Inventor, By the Inventor

Omiya, Japan

Masao Onizawa

This inventor holds 25 USPTO granted patents and 1 published patent application, primarily in Rubber Chemistry. Top assignees: Sanyo Trading Co., Ltd., J.m. Huber Corporation, Other. Active years: 1977-2002.

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

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

USPTO Granted Patents = 25 

% Patents Active = 92.0

Average Co-Inventor Count = 1.1

ph-index = 8

Forward Citations = 149(Granted Patents)


Location History:

  • Ohmiya, JA (1977 - 1978)
  • Kunitachi, JA (1978)
  • Ohmiya, JP (1978 - 1981)
  • Kunitachi, JP (1979 - 1981)
  • Omiya, JP (1999 - 2001)
  • Omiya, Saitama-ken, JP (2001)
  • Omiya-shi, Saitama-ken, JP (1999 - 2002)

Company Filing History:

goldMedal20 out of 20 
 
Sanyo Trading Co., Ltd.
 patents
silverMedal2 out of 356 
 
J.m. Huber Corporation
 patents
bronzeMedal5 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1977-2002

Loading Chart...
Areas of Expertise:
Crosslinking
Isoprene Rubber
Ethylene-Propylene-Diene
Silane-Treated Clay
Curable Composition
Vulcanizable Rubber
Amino Acids
Chloroprene Rubber
Bromobutyl Rubber
Vinyl Chloride Resin
Rubber Compositions
25 patents (USPTO):Explore Patents
1. 6403713 - METHOD FOR CROSSLINKING OF ISOPRENE-ISOBUTYLENE RUBBER, ETHYLENE-PROPYLENE-DIENE RUBBER CONTAINING ETHYLIDENENORBORNENE AS UNSATURATED COMPONENT, OR MIXTURE THEREOF; AND CROSSLINKED RUBBER PRODUCT OBTAINED BY SAID METHOD (2002-06-11),
2. 6388008 - Crosslinking isoprene-isobutylene rubber with alkylphenol-formaldehyde resin, hydrazide and epoxy compound (2002-05-14),
3. 6255394 - Crosslinking isoprene-isobutylene rubber with alkylphenol-formaldehyde resin and hydrazide (2001-07-03),
4. 6197105 - Hydrous clay slurry mixture containing a silane-treated clay (2001-03-06),
5. 6013699 - Silane-treated clay production method, silane-treated clay and (2000-01-11),
6. 5990204 - Crosslinking isoprene-isobutylene rubber with alkyphenol-formaldehyde (1999-11-23),
7. 5871846 - Silane-treated clay production method, silane-treated clay and (1999-02-16),
8. 4289861 - Curable rubber compositions with amino acids (1981-09-15),
9. 4286079 - Curable composition (1981-08-25),
10. 4273897 - Vulcanizable rubber compositions with amino acids (1981-06-16),
11. 4262098 - Curable composition of amino acid and chlorinated polyethylene (1981-04-14),
12. 4254016 - Composition containing vinylpyridine-styrene-butadiene copolymer, and (1981-03-03),
13. 4202952 - Method of vulcanizing bromobutyl rubber with amino acids (1980-05-13),
14. 4177337 - Vulcanizable rubber compositions and vulcanized rubber prepared therefrom (1979-12-04),
15. 4150945 - Method of treating textiles with a curable composition of an acrylic (1979-04-24),

Title: Innovations and Contributions of Masao Onizawa in Rubber Technology

Introduction

Masao Onizawa, hailing from Ohmiya, Japan, is a prominent inventor with a remarkable portfolio of 25 patents. His contributions to the field of rubber technology have led to significant advancements in the methods of crosslinking various types of rubbers, enhancing their properties and applications in various industries.

Latest Patents

Onizawa's recent patents showcase his innovative methods for crosslinking rubber materials. One of his latest inventions is a method for crosslinking isoprene-isobutylene rubber and ethylene-propylene-diene rubber, utilizing an alkylphenol-formaldehyde resin and other compounds. This method sets itself apart by producing a crosslinked rubber product that is low in compression set and corrosivity to metals, all without the use of halogen compounds. Another notable patent involves a novel approach for crosslinking isoprene-isobutylene rubber with specific additives, which yields a high-hardness crosslinked rubber product, again avoiding halogen compounds and minimizing the carbon black content.

Career Highlights

Throughout his career, Onizawa has been associated with esteemed companies, particularly Sanyo Trading Co., Ltd. His work at these organizations highlights his commitment to advancing rubber technology, fostering innovation, and maintaining high standards in materials science.

Collaborations

Masao Onizawa has collaborated with notable professionals in the field, including Gary M. Freeman and Carl J. Marshall, Jr. These collaborations have undoubtedly enriched his research, leading to the development of innovative solutions and patents that push the boundaries of what is possible in rubber technology.

Conclusion

Masao Onizawa's innovative contributions to the realm of rubber technology are a testament to his expertise and commitment to advancing the industry. His patents not only enhance the performance of rubber products but also pave the way for future innovations, showcasing the significance of his work in material science. As he continues to explore new methods and applications, Onizawa remains a pivotal figure in the evolution of rubber technology.

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]
Loading…