Patents by Inventor Junichi Watanabe

Junichi 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: 20260146754
    Abstract: A space control system includes a model calculator that generates a reduced-order model of a target space on a basis of a result of a fluid analysis of the target space, the target space being subjected to space control, an assimilator that predicts a spatial distribution of the target space by performing assimilation processing using the reduced-order model generated by the model calculator and environment data obtained by sensing the target space, and an information processor that searches for a control candidate at a time when the target space is subjected to the space control on a basis of the spatial distribution of the target space.
    Type: Application
    Filed: November 20, 2025
    Publication date: May 28, 2026
    Inventors: MIZUKI FUKUSHIMA, TAKAYA MATSUMOTO, YUKI ARAI, KEIKO TAKAHASHI, JUNICHI WATANABE, RYOTA KIKUCHI, MASARU KAMADA
  • Patent number: 12601986
    Abstract: Provided is a toner including toner base particles. Each toner base particle includes a crosslinked component. The crosslinked component includes a nonlinear polymer having 3 or more branches, terminals of which are metal ion crosslinked, and a glass transition temperature Tg of the nonlinear polymer as measured by differential scanning calorimetry is ?60° C. or higher but lower than 0° C.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: April 14, 2026
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomomi Harashima, Junichi Watanabe, Hiroshi Yamashita, Shinya Nakayama
  • Publication number: 20260002003
    Abstract: An amorphous polyester resin is provided that includes a polycondensation product of an alcohol component and a carboxylic acid component. The alcohol component includes at least one selected from the group consisting of plant-derived 1,3-propanediol, plant-derived 1,3-butanediol, and plant-derived ethylene glycol, and the carboxylic acid component includes a polycarboxylic acid having a sulfo group. A ratio (OHVa/AVa) of a hydroxyl value (OHVa) of the amorphous polyester resin with respect to an acid value (AVa) of the amorphous polyester resin is from 1.1 to 1.5.
    Type: Application
    Filed: June 23, 2025
    Publication date: January 1, 2026
    Applicant: Ricoh Company, Ltd.
    Inventors: Junichi Watanabe, Akinori Saitoh, Masahiro Yukikawa
  • Patent number: 12458650
    Abstract: Provided is a urination disorder-improving agent useful for treating or improving (or alleviating) a urination disorder regardless of the degree or presence of prostatomegaly. The urination disorder-improving agent contains a 2-oxapregnane compound represented by the following formula (1) as an active ingredient. (In the formula, R1 to R3 represent an alkyl group such as methyl group, R4 represents an alkylcarbonyl group such as acetyl group, X represents a halogen atom such as a chlorine atom, Y represents a hydroxyl group or oxo group bonded to the 11-position, 15-position, or 16-position of the steroid skeleton.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: November 4, 2025
    Assignee: ASKA PHARMACEUTICAL CO., LTD.
    Inventors: Hideo Kobayashi, Atsushi Shinbo, Youichi Nakano, Yuta Ito, Junichi Watanabe
  • Publication number: 20250334893
    Abstract: A resin particle is provided that includes a binder resin comprising a polyester resin. The resin particle has a volume average particle diameter of 4.5 ?m or more and 6.0 ?m or less, the resin particle has an adhesive strength of 150 gf or less, and the resin particle satisfies the following relational expressions (1) to (3): 0.93 ? X ? 0 .980 ( 1 ) Y < 0.5 ( 2 ) Y ? 1. 5 ? X - 1 . 0 ? 4 ( 3 ) where X represents a circularity of the resin particle and Y represents a loose apparent density (g/cm3) of the resin particle.
    Type: Application
    Filed: April 23, 2025
    Publication date: October 30, 2025
    Inventors: Yuka MIZOGUCHI, Akio TAKEI, Suzuka KARATO, Junichi WATANABE
  • Publication number: 20250264822
    Abstract: A resin particle having a core-shell structure is provided that includes a binder resin and an organic compound having a sulfo group, in which Formula (1), I(100)<I(t)<I(0), and Formula (2), 0.005<I(100), are satisfied in a range of 0<t<100. I(t) represents, in a depth profile of a surface of the resin particle measured by time-of-flight secondary ion mass spectrometry, a secondary ion intensity derived from the sulfo group at t (nm) in depth from an outermost surface of the resin particle.
    Type: Application
    Filed: February 3, 2025
    Publication date: August 21, 2025
    Inventors: Toshihiko SUGIYAMA, Junichi WATANABE, Kenji KOMITO, Shinya NAKAYAMA, Yuka MIZOGUCHI
  • Publication number: 20250231502
    Abstract: A polyester resin emulsion for toner contains an aqueous medium and resin particles S dispersed in the aqueous medium, the resin particles S containing a polyester resin A of a polycondensate of an alcohol component and a carboxylic acid component, wherein the alcohol component comprises tri- or tetra-valent alcohol having a straight chained or branched aliphatic saturated hydrocarbon backbone with 4 to 6 carbon atoms, the following relationship is satisfied, 0.3 ? OHV / AV ? 1. , where AV (mgKOH/g) represents an acid value of the polyester resin A and OHV (mgKOH/g) represents a hydroxyl value of the polyester resin A, AV is between 10 mgKOH/g and 25 mgKOH/g, and the polyester resin A has a repeated unit derived from polyethylene terephthalate of a condensate of terephthalic acid and ethylene glycol in an amount between 40 percent by mass and 70 percent by mass.
    Type: Application
    Filed: January 10, 2025
    Publication date: July 17, 2025
    Applicant: Ricoh Company, Ltd.
    Inventors: Shinya Nakayama, Junichi Watanabe, Akinori Saitoh, Masahiro Yukikawa, akio Takei
  • Patent number: 12346062
    Abstract: A toner includes a binding resin; and a metal crosslinking agent that forms a metal crosslinking with the binding resin. A measurement curve of a storage elastic modulus G? in a dynamic viscoelasticity measurement has a maximum value in a range of 100° C. or more.
    Type: Grant
    Filed: April 20, 2022
    Date of Patent: July 1, 2025
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshihiko Sugiyama, Junichi Watanabe, Yuka Mizoguchi, Hiroshi Yamashita, Kazuoki Fuwa, Tsuneyasu Nagatomo
  • Publication number: 20250085647
    Abstract: A polyester resin emulsion contains resin particles (S) containing an amorphous polyester resin (A) in which the carboxyl group of a polyester resin obtained by polycondensation of the alcohol component and the carboxylic acid component is neutralized by a basic substance and an aqueous medium where the resin particles (S) are dispersed, wherein the following relationship 1 is satisfied: 0.89 ? B / A ? 2.23 , where A represents an acid value of the amorphous polyester resin (A) and B represents an amount in mmol/g of cation derived from the basic substance.
    Type: Application
    Filed: August 26, 2024
    Publication date: March 13, 2025
    Applicant: Ricoh Company, Ltd.
    Inventors: Masahiro Yukikawa, Junichi Watanabe, Akinori Saitoh, Yuka Mizoguchi
  • Publication number: 20250013161
    Abstract: A resin particle contains a binder resin containing a polyester resin containing polyethylene terephthalate and a diol component of propylene glycol and a release agent containing an ester wax.
    Type: Application
    Filed: June 26, 2024
    Publication date: January 9, 2025
    Applicant: Ricoh Company, Ltd.
    Inventors: akio Takei, Junichi Watanabe, Yuka Mizoguchi, Suzuka Karato, Shinya Nakayama
  • Publication number: 20250013163
    Abstract: A resin particle contains a resin B containing a component derived from at least one of polyethylene terephthalate or polybutylene terephthalate and a biomass-derived resin C containing a linear aliphatic alcohol with 2 to 4 carbon atoms and a linear aliphatic acid with 10 to 12 carbon atoms, wherein the resin particle has a core shell structure of a core resin and a shell resin, the core resin contains a crystalline resin, and the proportion of the sum of the resin B and the resin C to 100 percent by mass of the resin particle is 30 or greater percent by mass.
    Type: Application
    Filed: July 2, 2024
    Publication date: January 9, 2025
    Applicant: Ricoh Company, Ltd.
    Inventors: Suzuka Karato, Yuka Mizoguchi, Akio Takei, Junichi Watanabe, Shinya Nakayama
  • Publication number: 20240392064
    Abstract: A polyester resin emulsion contains resin particles(S), each containing a polyester resin (A) obtained by polycondensation of an alcohol component and a carboxylic acid component, and an aqueous medium in which the resin particles(S) are dispersed, wherein the alcohol component contains tri- or tetra-alcohol having a backbone of a linear or branched saturated fatty acid with a carbon number of 4 to 6, and the ratio (OHV/AV) of a hydroxyl value (OHV) of the polyester resin (A) to an acid value (AV) of the polyester resin (A) is from 0.20 to 0.60.
    Type: Application
    Filed: May 21, 2024
    Publication date: November 28, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Shinya Nakayama, Junichi Watanabe, Akinori Saitoh, Masahiro Yukikawa, akio Takei
  • Publication number: 20240384794
    Abstract: The present invention addresses the problem of providing a sealing device capable of achieving long-term electrical conductivity between a rotary shaft and a housing at low cost and in a space-saving manner. The problem is solved by a sealing device that is disposed in and seals a gap between an outer surface of a rotary shaft and an inner surface of a housing having a shaft hole into which the rotary shaft is inserted, the inner surface forming the shaft hole, and that can provide electrical conductivity between the housing and the rotary shaft pressed against the inner surface of the housing forming the shaft hole when the rotary shaft rotates.
    Type: Application
    Filed: July 12, 2022
    Publication date: November 21, 2024
    Applicant: NOK CORPORATION
    Inventors: Masayuki TANIDA, Kenichi YOSHIMURA, Junichi WATANABE, Hideaki NAGAHAMAYA
  • Publication number: 20240319624
    Abstract: A resin particle may comprise a binder resin, a crystalline polyester resin; and a release agent being in a plurality of domains, which have a domain diameter of 1 ?m or less; wherein more than 80% of a surface of each of the plurality of domains of the release agent is covered with the crystalline polyester resin, and a melting point of the crystalline polyester resin is higher than a melting point of the release agent.
    Type: Application
    Filed: March 22, 2024
    Publication date: September 26, 2024
    Inventors: Tsuneyasu NAGATOMO, Junichi WATANABE, Kohsuke SATOH, Yuka MIZOGUCHI
  • Patent number: 12078961
    Abstract: A toner includes a crystalline polyester resin and an amorphous polyester resin. A ratio of the storage modulus of the toner G? (To) at a temperature To to the storage modulus of the toner G? (To+3) at a temperature To+3 is greater than or equal to 10, in a case where the temperature To is within a range from 50° C. to 65° C.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: September 3, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuka Mizoguchi, Hiroshi Yamashita, Junichi Watanabe, Tomomi Harashima
  • Publication number: 20240228770
    Abstract: Resin particles, each include amorphous polyester resins, a crystalline polyester resin, and a release agent. The amorphous polyester resins include (i) an amorphous polyester resin including a sulfonic acid salt group-containing polyester resin and (ii) an amorphous polyester resin different from the amorphous polyester resin including the sulfonic acid salt group-containing polyester resin. The sulfonic acid salt group-containing polyester resin has a solubility parameter of from 10 to 13. Each of the resin particles has a core-shell structure including a core layer and a shell layer. The shell layer includes the (i) amorphous polyester resin including the sulfonic acid salt group-containing polyester resin.
    Type: Application
    Filed: January 3, 2024
    Publication date: July 11, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Akinori Saitoh, Junichi Watanabe, Yuka Mizoguchi, Masahiro Yukikawa
  • Publication number: 20240210845
    Abstract: An amorphous polyester resin includes an environmentally friendly component. An environmentally friendly component content of the amorphous polyester resin is 40% by mass or greater and 80% by mass or less. The amorphous polyester resin is a sulfo group-containing amorphous polyester resin. A sulfo group content of the sulfo group-containing amorphous polyester resin is 2 mol % or greater and 10 mol % or less.
    Type: Application
    Filed: December 18, 2023
    Publication date: June 27, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Junichi WATANABE, Akinori SAITOH, Masahiro YUKIKAWA, Akio TAKEI, Yuka MIZOGUCHI
  • Publication number: 20240192620
    Abstract: A resin particle contains an amorphous resin, a crystalline resin C containing a biomass-derived resin, and at least one of polyethylene terephthalate or polybutylene terephthalate, wherein the resin particle has a core-shell structure comprising a core resin and a shell resin, the core resin comprises the crystalline resin C, and the proportion of the total mass of the biomass-derived resin, the polyethylene terephthalate, and the polybutylene terephthalate to the resin particle at 100 percent by mass is 30 or more percent by mass.
    Type: Application
    Filed: November 22, 2023
    Publication date: June 13, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuka Mizoguchi, Akio Takei, Junichi Watanabe, Akinori Saitoh, Masahiro Yukikawa
  • Publication number: 20240152065
    Abstract: Resin particles each include a crystalline polyester resin, an amorphous polyester resin, a release agent, and a colorant. The crystalline polyester resin includes an acid component and an alcohol component as constitutional units, and the acid component of the crystalline polyester resin includes plant-derived dicarboxylic acid having 12 or less carbon atoms. The crystalline polyester resin is present as domains in a matrix of the amorphous polyester resin within each resin particle, an average major axis of the domains of the crystalline polyester resin is 2.0 micrometers or less, and an average aspect ratio (major axis/minor axis) of the domains is 4.0 or greater. The resin particles have a carbon radioisotope 14C concentration of 5.4 pMC or greater.
    Type: Application
    Filed: February 28, 2022
    Publication date: May 9, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Junichi Watanabe, Yuka Mizoguchi, Kohsuke Satoh, Toshihiko Sugiyama
  • Publication number: 20240041899
    Abstract: Provided is a solid preparation having an excellent stability and being useful for treating or improving (or alleviating) a urination disorder regardless of the degree or presence of prostatomegaly. The solid preparation contains a 2-oxapregnane compound represented by the following formula (1) as an active ingredient, and a carrier. In the formula, R1 to R3 each represent an alkyl group such as a methyl group, R4 represents an alkylcarbonyl group such as an acetyl group, X represents a halogen atom such as a chlorine atom, and Y represents a hydroxyl group or oxo group bonded to the 11-position, 15-position, or 16-position of the steroid skeleton. The carrier contains a first carrier and/or a second carrier; the first carrier is not a metal salt-form, and the second carrier is a polyvalent metal salt-form of an inorganic acid.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 8, 2024
    Applicant: ASKA Pharmaceutical Co., Ltd.
    Inventors: Sakiko KITAMURA, Kazuhiro SASAKI, Hiroshige KATAOKA, Asuka OZAWA, Hideo KOBAYASHI, Atsushi SHINBO, Youichi NAKANO, Yuta ITO, Junichi WATANABE