Company Filing History:

9 out of 32

Du Pont Toray Company Limited

patents

3 out of 3,476

Toray Industries, Inc.

Years Active: 1983-2003

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6639041 - Spandex having low set at low temperatures (2003-10-28),

2. 6623585 - Coalesced multifilament spandex and method for its preparation (2003-09-23),

3. 6403712 - Process for the manufacture of spandex and the spandex made thereby (2002-06-11),

4. 6399003 - Process for making melt-spun spandex (2002-06-04),

5. 6376071 - Polyurethane fiber containing poly(vinylidene fluoride) (2002-04-23),

6. 6225435 - Stable polyurethaneurea solutions (2001-05-01),

7. 6214145 - Coalesced multifilament spandex and method for its preparation (2001-04-10),

8. 6096252 - Process of making polyurethane fiber (2000-08-01),

9. 5962130 - Durable polyurethane fiber and method for the manufacture thereof (1999-10-05),

10. 5800920 - Durable polyurethane fiber and method for the manufacture thereof (1998-09-01),

11. 5244467 - Method for production of polyphenylene sulfone fibers (1993-09-14),

12. 4942091 - Polyphenylene sulfone fibers and a method for production thereof (1990-07-17),

13. 4390566 - Method of producing soft sheet (1983-06-28),

Title: An Overview of Inventor Masao Umezawa

Introduction

Masao Umezawa, a prominent inventor based in Shiga, Japan, has made significant contributions to the field of materials science, particularly in the development of innovative spandex materials. With 13 patents to his name, Umezawa's work reflects the intersection of technology and textile engineering.

Latest Patents

Umezawa's latest inventions include the "Spandex Having Low Set at Low Temperatures" and "Coalesced Multifilament Spandex and Method for its Preparation." The first patent presents a novel low-set spandex based on copoly(alkylene ethers), featuring unique copolymers that incorporate tetramethylene ether along with either ethylene ether or 1,2-propylene ether moieties. This innovation aims to improve the performance of spandex in varying temperature conditions. The second patent outlines a process for manufacturing high-quality, well-coalesced spandex by dry-spinning high-melting thermoplastic polyurethane, bundling the filaments, and guiding them appropriately. This method enhances the fabric's properties, including heat settability, uniformity, and the ease of knitting and weaving, resulting in superior surface characteristics.

Career Highlights

Throughout his career, Masao Umezawa has been associated with esteemed companies such as DuPont and Toray Industries, Inc. His tenure at these organizations has allowed him to apply his expertise and creativity in developing advanced materials that cater to various industrial applications.

Collaborations

Umezawa has collaborated with notable colleagues like Hideki Nakanishi and Toshikazu Matsuda. These partnerships have fostered an environment of innovation, leading to the creation of groundbreaking solutions in the field of textiles.

Conclusion

Masao Umezawa stands out as a leading figure in innovation and invention within the textile industry. With a focus on enhancing spandex materials, his contributions through patents reflect a commitment to pushing the boundaries of material science. As he continues to work and collaborate with industry experts, Umezawa's future innovations are anticipated to further revolutionize the fabric and textile sectors.

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