Patents by Inventor Keita HAGIWARA

Keita HAGIWARA 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).

  • Patent number: 11433671
    Abstract: A liquid ejecting head unit configured to eject a liquid includes a flow channel member, and a liquid ejecting head configured to eject the liquid supplied from the flow channel member, in which the flow channel member includes a flow channel structure having a supply flow channel through which the liquid supplied from the outside flows, and a supply protrusion that protrudes from the flow channel structure and has a supply port for supplying the liquid from the outside to the supply flow channel, a wall surface of the supply flow channel is made of a resin, and at least a part of the supply protrusion is made of a metal.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: September 6, 2022
    Assignee: Seiko Epson Corporation
    Inventors: Hiroyuki Hagiwara, Katsuhiro Okubo, Takahiro Kanegae, Keita Moriyama
  • Publication number: 20200325329
    Abstract: The present invention provides a polyarylate resin which is excellent in heat-resisting properties, abrasion-resisting properties, solubility properties in non-halogenated organic solvents, a water vapor-barrier property, mechanical properties, liquid sag-resisting properties and deformation-resisting properties (such as adhesive properties). The present invention relates to a polyarylate resin comprising a dihydric phenol residue shown in general formula (1) and an aromatic dicarboxylic acid residue shown in general formula (2), a film comprising the same and a laminated product thereof: (wherein X represents a liner or branched bivalent hydrocarbon group having 4 to 8 carbon atoms.) (wherein R1 and R2 respectively and independently represent a monovalent hydrocarbon group having 1 to 6 carbon atoms, which may be substituted by one or more halogen atoms, or a halogen atom, and p and q respectively and independently represent an integer of 0 to 4.).
    Type: Application
    Filed: May 23, 2017
    Publication date: October 15, 2020
    Applicant: UNITIKA LTD.
    Inventors: Akira MURATA, Takamasa AKIZUKI, Chiho MATSUMOTO, Keita HAGIWARA