Masao Umezawa

Person

Kurita-gun, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Spandex having low set at low temperatures
- Patent number 6,639,041
- Issue date Oct 28, 2003
- DuPont Toray Co. Ltd.
- Hiroshi Nishikawa
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Coalesced multifilament spandex and method for its preparation
- Patent number 6,623,585
- Issue date Sep 23, 2003
- DuPont-Toray Co. Ltd.
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Process for the manufacture of spandex and the spandex made thereby
- Patent number 6,403,712
- Issue date Jun 11, 2002
- DuPont Toray Co. Ltd.
- Shingo Ito
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Process for making melt-spun spandex
- Patent number 6,399,003
- Issue date Jun 4, 2002
- DuPont Toray Co. Ltd.
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Polyurethane fiber containing poly(vinylidene fluoride)
- Patent number 6,376,071
- Issue date Apr 23, 2002
- DuPont Toray Co. Ltd.
- Toshihiro Tanaka
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Stable polyurethaneurea solutions
- Patent number 6,225,435
- Issue date May 1, 2001
- DuPont Toray Co. Ltd.
- Shingo Ito
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Coalesced multifilament spandex and method for its preparation
- Patent number 6,214,145
- Issue date Apr 10, 2001
- DuPont Toray Co., Ltd.
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Process of making polyurethane fiber
- Patent number 6,096,252
- Issue date Aug 1, 2000
- DuPont-Toray Co., Ltd.
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Durable polyurethane fiber and method for the manufacture thereof
- Patent number 5,962,130
- Issue date Oct 5, 1999
- DuPont-Toray Co., Ltd.
- Masao Umezawa
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Durable polyurethane fiber and method for the manufacture thereof
- Patent number 5,800,920
- Issue date Sep 1, 1998
- Dupont Toray
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Method for production of polyphenylene sulfone fibers
- Patent number 5,244,467
- Issue date Sep 14, 1993
- Toray Industries, Inc.
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Polyphenylene sulfone fibers and a method for production thereof
- Patent number 4,942,091
- Issue date Jul 17, 1990
- Toray Industries, Inc.
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Method of producing soft sheet
- Patent number 4,390,566
- Issue date Jun 28, 1983
- Toray Industries, Inc.
- Masao Umezawa
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...

Patents Applicationslast 30 patents

Information Patent Application
Spandex having low set at low temperatures
- Publication number 20020193550
- Publication date Dec 19, 2002
- Hiroshi Nishikawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Application
Coalesced multifilament spandex and method for its preparation
- Publication number 20010039790
- Publication date Nov 15, 2001
- Masao Umezawa
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING

Masao Umezawa

Person

Patents Grantslast 30 patents

Spandex having low set at low temperatures

Coalesced multifilament spandex and method for its preparation

Process for the manufacture of spandex and the spandex made thereby

Process for making melt-spun spandex

Polyurethane fiber containing poly(vinylidene fluoride)

Stable polyurethaneurea solutions

Coalesced multifilament spandex and method for its preparation

Process of making polyurethane fiber

Durable polyurethane fiber and method for the manufacture thereof

Durable polyurethane fiber and method for the manufacture thereof

Method for production of polyphenylene sulfone fibers

Polyphenylene sulfone fibers and a method for production thereof

Method of producing soft sheet

Patents Applicationslast 30 patents

Spandex having low set at low temperatures

Coalesced multifilament spandex and method for its preparation