Patents by Inventor Reo Mitsunaga

Reo Mitsunaga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • POLYPHENYLENE SULFIDE SHORT FIBER, FIBROUS STRUCTURE, FILTER FELT, AND BAG FILTER
    Publication number: 20200324234
    Abstract: A polyphenylene sulfide short fiber has a monofilament fineness of 0.70 to 0.95 dtex, a strength of 4.5 to 5.5 cN/dtex, a fiber length of 20 to 100 mm, and a melt flow rate (MFR) value of 200 to 295 g/10 min. The polyphenylene sulfide short fiber enables improvements to be made in the dust collection performance and mechanical strength without impairing the fiber productivity or felt productivity.
    Type: Application
    Filed: December 12, 2018
    Publication date: October 15, 2020
    Inventors: Takeshi Sugimoto, Reo Mitsunaga, Tatsuya Mori, Yuma Kobayashi
  • Laminated polyarylene sulfide heat-resistant filter
    Patent number: 10688753
    Abstract: A laminated polyarylene sulfide heat-resistant filter has a plurality of layers, at least including a first web layer that is a filtering surface, and a second web layer that is a non-filtering surface, the laminated polyarylene sulfide heat-resistant filter being characterized in that the first web layer contains 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 0.5 to 1.2 dtex, and 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 1.3 to 3.0 dtex taking a total of a weight percentages of the first web layer as 100 wt %, wherein the second web layer contains polyarylene sulfide fibers having a fineness of 1.0 to 4.0 dtex.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: June 23, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Tatsuya Mori, Takeshi Sugimoto, Reo Mitsunaga
  • LAMINATED POLYARYLENE SULFIDE HEAT-RESISTANT FILTER
    Publication number: 20190099981
    Abstract: A laminated polyarylene sulfide heat-resistant filter has a plurality of layers, at least including a first web layer that is a filtering surface, and a second web layer that is a non-filtering surface, the laminated polyarylene sulfide heat-resistant filter being characterized in that the first web layer contains 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 0.5 to 1.2 dtex, and 30 to 70 wt % of polyarylene sulfide fibers having a fineness of 1.3 to 3.0 dtex taking a total of a weight percentages of the first web layer as 100 wt %, wherein the second web layer contains polyarylene sulfide fibers having a fineness of 1.0 to 4.0 dtex.
    Type: Application
    Filed: March 13, 2017
    Publication date: April 4, 2019
    Inventors: Tatsuya Mori, Takeshi Sugimoto, Reo Mitsunaga
  • Polyphenylene sulfide fiber
    Patent number: 10106655
    Abstract: A poly(phenylene sulfide) fiber changes little in fiber structure and has excellent long-term heat resistance. Namely, the poly(phenylene sulfide) fiber has a degree of crystallization of 45.0% or higher, a content of movable amorphous components of 15.0% or less, and a weight-average molecular weight of 300,000 or less.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: October 23, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Hiroo Katsuta, Reo Mitsunaga, Daisuke Yamamoto, Shunsuke Horiuchi, Yoshitsugu Funatsu
  • POLYPHENYLENE SULFIDE FIBER
    Publication number: 20170226292
    Abstract: A poly(phenylene sulfide) fiber changes little in fiber structure and has excellent long-term heat resistance. Namely, the poly(phenylene sulfide) fiber has a degree of crystallization of 45.0% or higher, a content of movable amorphous components of 15.0% or less, and a weight-average molecular weight of 300,000 or less.
    Type: Application
    Filed: September 24, 2015
    Publication date: August 10, 2017
    Inventors: Hiroo Katsuta, Reo Mitsunaga, Daisuke Yamamoto, Shunsuke Horiuchi, Yoshitsugu Funatsu