Patents by Inventor Akihira Watanabe

Akihira Watanabe 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).

  • Publication number: 20220269356
    Abstract: A writing feel improving sheet comprising a base material and a writing feel improving layer with which a touch pen is brought into contact, wherein the writing feel improving layer contains an antiviral agent, and a number of peaks with an amplitude of 1.5 or more in a frequency range of 1 to 2 Hz is 3 or more and 20 or less.
    Type: Application
    Filed: February 14, 2022
    Publication date: August 25, 2022
    Applicant: LINTEC CORPORATION
    Inventors: Akihira WATANABE, Minami NAKANISHI, Hiroki HOSHINO
  • Patent number: 6353063
    Abstract: A process for producing a polyolefin in the presence of a transition metal-containing metallocene catalyst that maintains stable operation for long periods of time without suffering from adhesion of the produced polymer to the wall of a reactor or formation of a sheet-like polymer or a massive polymer. The process utilizes a transition metal-containing metallocene catalyst and an organoaluminum compound represented by formula: R1nAl(OR2)3−n, wherein R1 represents a C1-20 alkyl group, an aryl group, hydrogen or halogen; R2 represents a C1-20 alkyl group or an aryl group; and n is a number selected from 0≦n<3, under conditions such that the temperature of the wall of a polymerization reactor, Tw (° C.), and the polymerization temperature, Tr (° C.), satisfy the relationship: 0.5<Tr−Tw<10.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: March 5, 2002
    Assignee: Japan Polychem Corporation
    Inventors: Masafumi Shimizu, Yoshiyuki Ishihama, Akihira Watanabe
  • Patent number: 6300451
    Abstract: Copolymers, and processes to make them, are provided which are derived from monomers comprising: a) one mono-olefin having a single Ziegler-Natta polymerizable bond; b) a second monomer having at least one Ziegler-Natta polymerizable bond; c) a third monomer having at least two Ziegler-Natta polymerizable bonds such monomer being: i) straight-chained and of less than six or at least seven carbon atoms; ii) other than straight chained; or iii) combinations thereof, such copolymer having: c) at least about one carbon-carbon unsaturated bond per number average molecule; d) viscous energy of activation (Ea) at least 1 kcal/mol greater than a copolymer having a linear backbone derived from same monomers, but excluding species having at least two Ziegler-Natta polymerizable bonds; e) crystallinity level of about 10% to about 50%; and f) Mz/Mw at least about 1.7. Such copolymers show enhanced melt processability and other attributes during end-product fabrication.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: October 9, 2001
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Aspy Keki Mehta, Charles Stan Speed, Jo Ann Marie Canich, Norbert Baron, Bernard Jean Folie, Makoto Sugawara, Akihira Watanabe, Howard Curtis Welborn, Jr.