Patents Examined by Peter L. Vajda
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic image forming apparatus
    Patent number: 11500301
    Abstract: An electrophotographic photosensitive member, which is suppressed in occurrence of fogging and is excellent in abrasion resistance. In the electrophotographic photosensitive member, an outermost surface layer of the electrophotographic photosensitive member comprises a polymerized product of a composition comprising at least a polyrotaxane and a monomer having a polymerizable reactive group, and a chain molecule of the polyrotaxane has two blocking groups at both terminals thereof, and a (meth)acryloyloxy group of a cyclic molecule of the polyrotaxane forms a bond.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: November 15, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hideharu Shimozawa, Kenichi Kaku, Tsutomu Nishida, Kazunori Noguchi, Akihiro Maruyama, Kaname Watariguchi, Takashi Anezaki, Haruyuki Tsuji
  • Electrophotographic photosensitive member, process cartridge and electrophotographic image forming apparatus
    Patent number: 11493853
    Abstract: An electrophotographic photosensitive member having a support and a photosensitive layer on the support, wherein the electrophotographic photosensitive member comprises a surface layer comprising a polymerization product of a composition containing polyrotaxane and a charge transporting substance, and the polymerization product including a bond between the polyrotaxane and the charge transporting substance.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: November 8, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideharu Shimozawa, Kenichi Kaku, Tsutomu Nishida, Kazunori Noguchi, Akihiro Maruyama, Kaname Watariguchi, Takashi Anezaki, Haruyuki Tsuji
  • Electrophotographic apparatus, process cartridge, and cartridge set
    Patent number: 11474442
    Abstract: An electrophotographic apparatus having an electrophotographic photosensitive member, a charging unit, and a developing unit for forming a toner image on a surface of the electrophotographic photosensitive member, wherein the charging unit has a conductive member disposed to be contactable with the electrophotographic photosensitive member; a conductive layer at the surface of the conductive member has a matrix and a plurality of domains dispersed in the matrix; at least a portion of the domains is exposed at the outer surface of the conductive member; the outer surface of the conductive member is constituted of at least the matrix and the domains; a volume resistivity R1 of the matrix is greater than 1.00×1012 ?·cm; a volume resistivity R2 of the domains is smaller than R1; the developing unit contains the toner; and a dielectric loss tangent of the toner is at least 0.0027.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: October 18, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kosuke Fukudome, Tomohiro Unno, Dai Nozaki, Kozue Uratani, Yuta Komiya, Masahiro Kurachi, Kazuhiro Yamauchi, Motonari Ito
  • Toner for developing electrostatic images
    Patent number: 11474443
    Abstract: The toner for developing electrostatic images is less likely to cause toner ejection and is excellent in printing durability. The toner includes colored resin particles and external additives. The external additives includes an external additive A and an external additive B; wherein the external additive A is silica particles being surface-hydrophobized with a specific hydrophobizing agent and having a specific number average particle diameter; and wherein the external additive B is silicone resin particles having a ratio (BS/TS) of a BET specific surface area (BS) to a theoretical specific surface area (TS) in a range of from 3.0 to 30.0, and having a specific number average particle diameter.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: October 18, 2022
    Assignee: ZEON CORPORATION
    Inventors: Takeru Chiba, Sakyo Yagyu
  • Near-infrared absorbing photosensitive composition, cured film, optical filter, method for forming pattern, laminate, solid-state imaging element, image display device, and infrared sensor
    Patent number: 11467491
    Abstract: Provided are a near-infrared absorbing photosensitive composition including at least one oxocarbon compound selected from a compound represented by Formula (SQ1) or a compound represented by Formula (CR1), a polymerizable compound, a photopolymerization initiator, and a solvent; a cured film formed of the near-infrared absorbing photosensitive composition; an optical filter; a method for forming a pattern; a laminate; a solid-state imaging element; an image display device; and an infrared sensor. In Formula (SQ1), Rs1 and Rs2 each independently represent a monovalent organic group. In Formula (CR1), Rc1 and Rc2 each independently represent a monovalent organic group.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: October 11, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Kyohei Arayama, Tokihiko Matsumura
  • Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device
    Patent number: 11467489
    Abstract: An actinic ray-sensitive or radiation-sensitive resin composition contains a compound that generates an acid upon irradiation with actinic rays or radiation and a resin whose polarity increases by the action of an acid, in which the compound is represented by a specific General Formula (X).
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: October 11, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Kazunari Yagi, Takashi Kawashima, Tomotaka Tsuchimura
  • Toner
    Patent number: 11467510
    Abstract: Provided is a toner containing a toner particle comprising a binder resin and an organosilicon polymer, wherein the organosilicon polymer contains an organosilicon polymer particle, the organosilicon polymer particle has a structure represented by the following formula (1): R1—SiO3/2??(1) in formula (1), R1 is a C1-4 alkyl group, and in cross-sectional observation of the toner particle by transmission electron microscopy, the organosilicon polymer particle is present in a region extending up to 80% of the distance A from the centroid out of the total distance A from the centroid of the toner particle cross-section to the contour of the cross-section, and the particle diameter of the organosilicon polymer particle is from 10 nm to 200 nm.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: October 11, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuhei Terui, Yoshihiro Nakagawa, Junya Asaoka, Yuu Sasano, Koki Inoue, Kenta Katayama
  • Chemically amplified photoresist composition and photoresist film using the same
    Patent number: 11467493
    Abstract: A chemically amplified photoresist composition comprising a triazole-based plasticizer and an alkali developable resin, which is capable of minimizing cracking of a photoresist obtained from the composition and improving adhesion to a substrate and sensitivity, and a photoresist film comprising a cured product of the chemically amplified photoresists composition.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 11, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Min Young Lim, Yongmi Kim, Ji Hye Kim
  • Photosensitive resin composition, photosensitive dry film, and pattern forming process
    Patent number: 11460774
    Abstract: A photosensitive resin composition comprising a polymer containing a silphenylene skeleton and a fluorene skeleton and having a crosslinkable site in the molecule, a phenol compound having a Mw of 300-10,000, a photoacid generator, and a benzotriazole or imidazole compound has improved film properties. Even from a thick film, a fine size pattern can be formed.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: October 4, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yoshinori Hirano, Michihiro Sugo, Satoshi Asai, Takahiro Goi
  • Toner
    Patent number: 11448980
    Abstract: A toner comprising a toner particle comprising a binder resin and an azo dye, wherein the binder resin comprises a polymer A, the polymer A is a polymer having a monomer unit derived from methacrylonitrile, and a relationship among an amount of substance (mol) of the monomer unit derived from methacrylonitrile, an amount of substance (mol) of the azo dye, and the number of azo groups in the azo dye in the toner particle satisfies formula below: [(amount of substance of azo dye (mol))×(number of azo groups in azo dye)/(amount of substance of monomer unit derived from methacrylonitrile (mol))]?0.500.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: September 20, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Matsui, Noritaka Toyoizumi, Tsutomu Shimano, Kenji Aoki, Shohei Shibahara, Yuna Yamamoto
  • Fluorescent latexes with enhanced brightness
    Patent number: 11448981
    Abstract: Fluorescent latexes are provided. In embodiments, a fluorescent latex comprises water and fluorescent agent-incorporated resin particles, the particles comprising a resin and a Förster Resonance Energy Transfer (FRET) pair comprising a fluorescent brightener having a fluorescence emission spectrum and a fluorescent dye having an absorption spectrum that overlaps with the fluorescence emission spectrum of the fluorescent brightener, wherein the fluorescent latex exhibits FRET under illumination with ultraviolet (UV) light. Fluorescent toners made from the fluorescent latexes are provided. Methods of making and using the fluorescent toners are also provided.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: September 20, 2022
    Assignee: Xerox Corporation
    Inventor: Chunliang Lu
  • Materials and methods for forming resist bottom layer
    Patent number: 11442364
    Abstract: A method includes forming a bottom layer over a semiconductor substrate, where the bottom layer includes a polymer bonded to a first cross-linker and a second cross-linker, the first cross-linker being configured to be activated by ultraviolet (UV) radiation and the second cross-linker being configured to be activated by heat at a first temperature. The method then proceeds to exposing the bottom layer to a UV source to activate the first cross-linker, resulting in an exposed bottom layer, where the exposing activates the first cross-linker. The method further includes baking the exposed bottom layer, where the baking activates the second cross-linker.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: September 13, 2022
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Jing Hong Huang, Chien-Wei Wang, Shang-Wern Chang, Ching-Yu Chang
  • Electrophotographic photoreceptor, process cartridge, and image forming apparatus
    Patent number: 11435674
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer on the conductive substrate. The electrophotographic photoreceptor has an outermost surface layer that contains fluorine-containing resin particles and a fluorine-containing graft polymer. The fluorine-containing resin particles contain 0 or more and 30 or less carboxy groups per 106 carbon atoms. The outermost surface layer has a dielectric constant of 3.75 or more and 3.90 or less. The contact angle of pure water on the outermost surface layer is 90° or more.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: September 6, 2022
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Yuto Okazaki, Wataru Yamada, Masahiro Iwasaki, Keisuke Kusano, Taisuke Fukui
  • Toner and method of producing toner
    Patent number: 11429032
    Abstract: A toner containing a toner particle that contains a binder resin including a polyester resin, and a polyolefin resin having —COOM that is a neutralized carboxy group with a monovalent metal ion M, wherein the polyolefin resin having —COOM is a polymer in which a vinyl polymer is bonded to a polyolefin, a content of a monomer unit containing —COOM in the polyolefin resin having —COOM is 1 to 20 mass %, and in a FT-IR spectrum obtained through measurement of a large particle size-side particle group and a small particle size-side particle group obtained by dividing the toner into two substantially equal parts, on a number basis, a ratio of the intensity of a maximum absorption peak in a range from 1545 cm?1 to 1555 cm?1 with respect to the intensity of a maximum absorption peak in a range from 1713 cm?1 to 1723 cm?1 exhibits a specific relationship.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: August 30, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takaho Shibata, Yuichi Mizo, Koh Ishigami, Takakuni Kobori, Masaharu Miura, Takeshi Ohtsu, Yosuke Iwasaki, Daisuke Yamashita, Ryo Nakajima, Wakiko Katsumata, Hitoshi Sano, Kenta Mitsuiki, Rei Hijikawa
  • Ferrite carrier core material for electrophotographic developer, ferrite carrier, manufacturing method thereof, and electrophotographic developer using said ferrite
    Patent number: 11422480
    Abstract: The present invention provides: a ferrite carrier core material for an electrophotographic developer, the material having a mesh passing amount of 3 wt % or less as indicated by the ratio of the weight of particles passing through a 16 ?m-mesh to the weight of whole particles constituting a powder, and having a particle strength index of 2 wt % or less as indicated by a difference between the mesh passing amounts before and after crushing; a ferrite carrier which is for an electrophotographic developer and in which the surface of the ferrite carrier core material is coated with a resin; and an electrophotographic developer which includes the ferrite carrier and a toner.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: August 23, 2022
    Assignee: POWDERTECH CO., LTD.
    Inventors: Makoto Ishikawa, Hiroki Sawamoto, Tetsuya Uemura
  • Toner
    Patent number: 11415902
    Abstract: A toner comprising a resin that contains an amorphous segment and a crystalline segment as a binder resin, wherein a proportion of a tetrahydrofuran-insoluble matter of a resin component is from 40% by mass to 80% by mass; in differential scanning calorimeter measurement of the tetrahydrofuran-insoluble matter, where a temperature of a maximum endothermic peak is denoted by Tm [° C.] and an endothermic quantity is denoted by H(I) [J/g], the following formulas (1) and (2) are satisfied: 55.0?Tm?80.0??(1) 10.0?H(I)?80.0??(2).
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: August 16, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shuntaro Watanabe, Hiroki Akiyama, Hiroki Kagawa
  • Resist composition and patterning process
    Patent number: 11415887
    Abstract: A resist composition comprising a base polymer and a quencher in the form of a salt of a cyclic ammonium cation with a carboxylate, sulfonamide, halogenated phenoxide or halide anion offers a high sensitivity and minimal LWR or improved CDU, independent of whether it is of positive or negative tone.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: August 16, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Jun Hatakeyama, Masaki Ohashi, Takayuki Fujiwara
  • Method for forming photoresist
    Patent number: 11409195
    Abstract: The present disclosure provides a photoresist. The photoresist is formed by a crosslinking polymerization reaction between a reactive group-containing biimidazole molecule and a nitrogen-containing compound.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: August 9, 2022
    Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
    Inventor: Wenliang Gong
  • Toner and toner manufacturing method
    Patent number: 11397386
    Abstract: A toner comprising a toner particle that includes a binder resin, wherein in dynamic viscoelasticity measurement of the toner, the storage elastic modulus of the toner at 70° C. is from 0.10 MPa to 3.00 MPa, and in nanoindentation measurement of the toner, the surface storage elastic modulus of the toner at 25° C. under 150 ?N of load is from 2.80 GPa to 4.50 GPa.
    Type: Grant
    Filed: May 11, 2020
    Date of Patent: July 26, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hirofumi Kyuushima, Yoshiaki Shiotari, Shintaro Noji, Mai Kato
  • Toner compositions and additives
    Patent number: 11397387
    Abstract: Disclosed herein is a toner composition, developer and additive for a toner composition. The toner composition includes toner particles including at least one resin, an optional colorant, an optional wax, and a polymeric toner additive on at least a portion of an external surface of the toner particles. The polymeric toner additive includes a polymeric resin including a fluorinated acrylic monomer, a cross-linkable monomer containing two or more vinyl groups at 8 wt % to 40 wt % of the polymeric resin, and optionally a charge control agent comprised of a nitrogen containing group at 0.1 wt % to 1.5 wt % of the polymeric resin.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: July 26, 2022
    Assignee: Xerox Corporation
    Inventors: Richard Philip Nelson Veregin, Kimberly D. Nosella, Raysa Rodriguez Diaz, Melanie Lynn Davis, Cuong Vong