Patents Assigned to SPIBER INC.
  • Publication number: 20250075423
    Abstract: The present disclosure relates to a synthetic leather including a base material layer containing a fiber base material, in which at least a part of the synthetic leather contains a polypeptide derivative, the polypeptide derivative contains a block copolymer containing a first segment containing a polypeptide skeleton, and one or a plurality of second segments that are bonded to the first segment, the polypeptide skeleton is a recombinant polypeptide skeleton or a hydrophobic polypeptide skeleton, and the second segment contains a molecular group having a plasticizing function for the polypeptide skeleton.
    Type: Application
    Filed: August 2, 2022
    Publication date: March 6, 2025
    Applicant: Spiber Inc.
    Inventors: Hideki Kagata, Kazuki Sakata
  • Patent number: 12195883
    Abstract: The present invention provides a modified fibroin fiber having a shrinkage history of being irreversibly shrunk after spinning, the modified fibroin fiber containing modified fibroin, wherein a fiber diameter of a raw material fiber before being irreversibly shrunk exceeds 25 ?m.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: January 14, 2025
    Assignee: Spiber Inc.
    Inventors: Yunosuke Abe, Masato Matsuo, Shota Togashi
  • Patent number: 12163259
    Abstract: An object of the present invention is to provide a method for producing protein spinning capable of securing a stable strength by securing sufficient interlacing between fibers. The method for producing a protein spun yarn of the present invention includes a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin and a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: December 10, 2024
    Assignees: SHIMA SEIKI MFG., LTD., SPIBER INC.
    Inventors: Shozo Torigoe, Akihiko Ozeki
  • Publication number: 20240399008
    Abstract: The present invention provides a deodorant material containing artificial fibroin as an active component, an agent for imparting deodorant properties, containing artificial fibroin as an active component, an article containing the agent for imparting deodorant properties, and a method for imparting deodorant properties, including a step of adding artificial fibroin to an article.
    Type: Application
    Filed: September 13, 2022
    Publication date: December 5, 2024
    Applicants: Spiber Inc., GOLDWIN INC.
    Inventors: Akito Sato, Takayuki KOJIMA
  • Publication number: 20240383943
    Abstract: The present invention provides a ?-ketoester of a protein containing an amino acid having a hydroxyl group, wherein the hydroxyl group forms an ester bond with a group represented by Formula (1) wherein R represents a C1-6 alkyl group or an optionally substituted aryl group.
    Type: Application
    Filed: November 2, 2022
    Publication date: November 21, 2024
    Applicant: Spiber Inc.
    Inventors: Kazuki Sakata, Seiji Shirakawa, Nao Kitahara, Takahiro Niwa
  • Patent number: 12145971
    Abstract: The present invention relates to a polypeptide solution in which a polypeptide including an amino acid sequence derived from type I keratin that belongs to Cluster Ia is dissolved in a solvent including a formic acid or a solvent including an aprotic polar agent having a dipole moment of 3.0 D or more and an inorganic salt.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: November 19, 2024
    Assignee: Spiber Inc.
    Inventors: Ayumi Abe, Keisuke Morita, Kenji Kurachi, Yunosuke Abe
  • Patent number: 12084574
    Abstract: Provided is a flexible polyurethane foam having high hardness required for weight reduction of members and having low stress relaxation. A flexible polyurethane foam comprises a structural protein fiber having a length of 0.1 mm to 5 mm.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: September 10, 2024
    Assignees: BRIDGESTONE CORPORATION, Spiber Inc.
    Inventors: Koji Sanefuji, Hideharu Seguchi, Toshiki Takizawa, Naoko Nisikita
  • Patent number: 12018405
    Abstract: A protein fiber having a crimp property, such that the protein fiber crimps in response to a stimulus, is immersed in a solution of protein having a different composition from the protein fiber. The protein fiber treated with the different protein composition is infiltrated into the protein and the protein fiber is made to crimp.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: June 25, 2024
    Assignees: SHIMA SEIKI MFG., LTD., SPIBER INC
    Inventors: Shozo Torigoe, Seiji Shimoda, Akihiko Ozeki
  • Patent number: 12018056
    Abstract: The present invention relates to a highly contracted artificial fibroin fiber including a modified fibroin, in which a contraction percentage defined by the following equation exceeds 7%.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: June 25, 2024
    Assignee: Spiber Inc.
    Inventors: Junichi Sugahara, Keisuke Morita, Hiroyuki Nakamura
  • Patent number: 11981088
    Abstract: Disclosed is a molded article including a modified fibroin and a water resistance-imparting material. The modified fibroin and the water resistance-imparting material may be covalently bonded.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: May 14, 2024
    Assignee: Spiber Inc.
    Inventors: Kazuki Sakata, Kentaro Takahashi
  • Publication number: 20240083955
    Abstract: The present invention relates to a highly contracted artificial fibroin fiber including a modified fibroin, in which a contraction percentage defined by the following equation exceeds 7%.
    Type: Application
    Filed: October 6, 2023
    Publication date: March 14, 2024
    Applicants: Spiber Inc., Kojima Industries Corporation
    Inventors: Junichi Sugahara, Keisuke Morita, Hiroyuki Nakamura
  • Patent number: 11851684
    Abstract: Disclosed is an expression cassette comprising, in a 5? to 3? direction of a sense strand, a promoter, and a first nucleic acid, a terminator and a second nucleic acid operably linked to the promoter, wherein the first nucleic acid and the second nucleic acid each contain at least one gene.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: December 26, 2023
    Assignee: Spiber Inc.
    Inventor: Masahiro Murakami
  • Publication number: 20230248020
    Abstract: The present invention relates to a meat-like food composition containing: at least one raw material selected from the group consisting of a meat raw material and a meat substitute composition raw material; and a sheet containing a purified protein.
    Type: Application
    Filed: June 8, 2021
    Publication date: August 10, 2023
    Applicant: Spiber Inc.
    Inventors: Yu Chun Chuang, Arin Naidu
  • Publication number: 20230212798
    Abstract: An object of the present invention is to provide a nonwoven fabric that makes it difficult to diffuse liquid in a plane direction and can absorb and transmit liquid in a spot manner, that is, a nonwoven fabric excellent in so-called spot absorbability. The nonwoven fabric according to the present invention is formed by mixing an artificial protein fiber and a hydrophobic synthetic fiber.
    Type: Application
    Filed: May 27, 2021
    Publication date: July 6, 2023
    Applicants: Shinwa Corp., Spiber Inc.
    Inventors: Akira Takaoka, Nozomi Ando, Kyota Fukui, Akihiko Ozeki
  • Patent number: 11692015
    Abstract: The present invention relates to a modified fibroin including a domain sequence represented by Formula 1: [(A)nmotif-REP]m or Formula 2: [(A)nmotif-REP]m?(A)n motif, in which the domain sequence has an amino acid sequence with a reduced content of a glutamine residue equivalent to an amino acid in which one or a plurality of glutamine residues in REP are deleted or substituted with other amino acid residues, as compared with a naturally occurring fibroin.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: July 4, 2023
    Assignees: Spiber Inc., Riken
    Inventors: Keisuke Morita, Yunosuke Abe, Takehisa Maekawa, Koichi Kotaka, Junichi Sugahara, Keiji Numata
  • Publication number: 20230174997
    Abstract: The present invention relates to a method for preparing a plasmid containing DNA that encodes a Type I polyketide synthase (PKS), the method including a step of introducing a DNA construct containing tandem repeats of DNA that encodes a PKS into a Bacillus subtilis competent cell.
    Type: Application
    Filed: May 25, 2021
    Publication date: June 8, 2023
    Applicant: Spiber Inc.
    Inventors: David Lips, Gijs Verkleij
  • Publication number: 20230174956
    Abstract: The present invention relates to a method of preparing a gene cluster construct including a plurality of genes encoding a multi-modular biosynthetic enzyme, the method including (A) a step of preparing a plurality of DNA fragments which are capable of reconstructing the gene cluster construct and have structures that can be ligated to each other and (B) a step of ligating the plurality of DNA fragments prepared in the step (A) to each other by mixing the plurality of DNA fragments in a solution to obtain the gene cluster construct.
    Type: Application
    Filed: May 25, 2021
    Publication date: June 8, 2023
    Applicant: Spiber Inc.
    Inventors: David Lips, Gijs Verkleij
  • Patent number: 11668024
    Abstract: A polar solvent solution of the present invention is a polar solvent solution in which a solute containing a polyamine acid is dissolved in a polar solvent. The solution has a moisture content of less than 5 mass % based on 100 mass % of the solution. A method for producing a polar solvent solution of the present invention includes changing a moisture content of the solution to adjust the viscosity of the solution. Further, another method for producing a polar solvent solution includes reducing a moisture content of the solution to increase the viscosity of the solution. Thus, the present invention provides a polar solvent solution that enables stable spinning and casting without lowering its viscosity when used as dopes for spinning, film, etc., and methods for producing the same.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: June 6, 2023
    Assignee: SPIBER, INC.
    Inventors: Kana Ishida, Hironori Yamamoto, Hiroaki Suzumura, Kazuhide Sekiyama
  • Publication number: 20230128695
    Abstract: An aspect of the present disclosure provides a synthetic polymer containing a first segment containing a polypeptide skeleton and one or a plurality of second segments bonded directly to the first segment, in which the second segment contains a molecular group having a plasticizing function for the polypeptide skeleton.
    Type: Application
    Filed: March 16, 2021
    Publication date: April 27, 2023
    Applicant: Spiber Inc.
    Inventors: Kazuki Sakata, Nao Kitahara, Seiji Shirakawa, Kentaro Takahashi, Leona Muto, Oliver Syed Shafaat, Hideki Kagata
  • Publication number: 20230095432
    Abstract: To provide a meat substitute composition having a texture and sensory properties closer to those of real meat than a meat substitute composition in the related art, the present disclosure provides meat substitute composition containing a polypeptide that satisfies the following (1) or (2): (1) number of amino acid residues is 150 or more, an alanine residue content is 12 to 40%, and a glycine residue content is 11 to 55%; or (2) an amino acid residue content of at least one type selected from the group consisting of serine, threonine, and tyrosine, an alanine residue content, and a glycine residue content account for 56% or more altogether.
    Type: Application
    Filed: January 29, 2021
    Publication date: March 30, 2023
    Applicant: Spiber Inc.
    Inventors: Yu Chun Chuang, Li Jiang, Arin Naidu