Patents Assigned to Mitsubishi Pencil Company, Limited
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Publication number: 20240148618Abstract: Provided is a Prussian blue dispersion for cosmetics excellent in dispersion stability, color-developing properties (high chroma), and storage stability, and a cosmetic in which the Prussian blue dispersion is blended, the cosmetic being suitable for makeup cosmetics such as eyeshadows, eyeliners, eyebrow pencil, and mascaras. Further provided is a green liquid cosmetic excellent in green color developing properties (high chroma) and dispersion stability, the cosmetic being suitable for makeup cosmetics such as eyeshadows, eyeliners, eyebrow pencil, and mascaras. The Prussian blue dispersion for cosmetics of the present disclosure includes at least Prussian blue, a water-soluble basic substance, and water. The cosmetic of the present invention is formed by blending the Prussian blue dispersion. Further, the green liquid cosmetic is obtained by blending the Prussian blue dispersion with a red iron oxide dispersion of red color having a specific property.Type: ApplicationFiled: February 16, 2022Publication date: May 9, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Kensuke INOUE, Takayuki HAYAKAWA, Satoshi SAKUMA
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Publication number: 20240150599Abstract: An oily ink composition may include propylene glycol monomethyl ether, a resin, a hydroxy acid ester having a boiling point of 150° C. or higher, a co-solvent, and a vapor-deposited aluminum pigment of a leafing type. The resin can dissolve in the co-solvent and the co-solvent may have a higher boiling point than the hydroxy acid ester.Type: ApplicationFiled: February 24, 2022Publication date: May 9, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventor: Takayuki IKAI
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Publication number: 20240132735Abstract: A water-based ink composition for an aqueous ballpoint pen that maintains smooth writing feel even when stored for a long time with a pen tip facing downward and is excellent in suppressing abrasion of a ball receiving seat is provided. Such an ink composition for an aqueous ballpoint pen includes an ink composition for an aqueous ballpoint pen, the ink composition comprising at least a coloring material; fine particles having a new Mohs hardness of 3 or greater and an average particle size of 30 ?m or less; a polyoxyethylene polycyclic phenyl-based surfactant; and a water-soluble solvent.Type: ApplicationFiled: March 23, 2022Publication date: April 25, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Yuichi MIYAZAKI, Satoshi UEDA
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Patent number: 11964509Abstract: Provided is a writing tool comprising a clip composed of a wire rod, wherein the writing tool is capable of allowing a user to raise the clip without manipulation with both hands. The writing tool 1 comprises a tool body 7 extending in a longitudinal direction, and a clip member 8 composed of a wire rod and held by a lateral portion of the tool body 7, wherein a longitudinal intermediate portion 8B of the clip member 8 is held by the lateral portion of the tool body 7, and the clip member 8 is biased toward the tool body 7 so as to cause a longitudinal fore-end portion 8A of the clip member 8 to come into contact with the tool body 7, and wherein the writing tool is configured such that, when a back-end portion 8C of the clip member 8 is pushed toward the tool body 7, the fore-end portion 8A of the clip member 8 is swung to be spaced apart from the tool body 7.Type: GrantFiled: March 12, 2020Date of Patent: April 23, 2024Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventor: Takeo Fukumoto
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Publication number: 20240101307Abstract: A replacement lead case includes a case body that forms an inner space surrounded by a rear surface plate and right and left leg plates as a replacement lead accommodation room and has a lid body on the tip end thereof and a case part on a rear part thereof via a bendable thin part provided on the rear surface plate, and a cover member that has a U-shaped cross-section orthogonal to a longitudinal direction molded by a front surface plate and right and left outer leg plates covers the replacement lead accommodation room on a case body with the front surface plate and slidably supports the case body in the longitudinal direction with the leg plates positioned on the inside of the outer leg plates. A rail-shaped guide is formed on the lid body along the longitudinal direction, and the cover member includes a slider that contacts the guide.Type: ApplicationFiled: December 16, 2021Publication date: March 28, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Mitsuhiro KAWABATA, Kyoichiro NAKAMURA, Kiyoshi FUJISAWA
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Patent number: 11926749Abstract: Provided is an aqueous ink composition for writing instruments which is excellent in an antibacterial property and an antifungal property without damaging storage stability and writing performances. The aqueous ink composition for writing instruments according to the present invention is characterized in that at least particles comprising principally a polymer represented by the following Formula (I) are contained as an active ingredient and that a content thereof is 0.1 to 30 mass %: wherein R is an alkyl group having 2 to 8 carbon atoms.Type: GrantFiled: October 2, 2019Date of Patent: March 12, 2024Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventor: Hisato Haga
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Publication number: 20240051329Abstract: Provided is a writing implement that maximizes the effective area of a viewer portion allowing visual recognition in the writing direction and that facilitates writing at a high level, at the same time. This writing implement is a writing implement A, including for example, a pen tip 20 that feeds ink from a writing implement body 10 and has a viewer portion 33 allowing visual recognition in the writing direction. The pen tip 20 is comprised of, at least, a writing part 25 and a retainer 30 having the viewer portion 33, an ink feeder portion 26 for feeding the ink from the writing implement body 10 to the writing part 25. The minimum width X of the viewer portion 33 is 3.7 mm or greater and a length Y of the viewer portion 33 is 7.4 mm or greater. The ink feeder portion 26 is arranged on one side of the viewer portion 33.Type: ApplicationFiled: February 9, 2022Publication date: February 15, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Hirotake IZAWA, Toshimi KAMITANI, Chihiro MOCHIZUKI, Kaito TSUKADA
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Publication number: 20240042488Abstract: A backing material for an ultrasonic probe according to the present invention comprises a carbonaceous matrix that has communicating holes distributed in the matrix, and a resin with which the communicating holes are filled.Type: ApplicationFiled: December 8, 2021Publication date: February 8, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Kunitaka YAMADA, Toshiki OHNO
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Publication number: 20240042735Abstract: Provided is a liquid (e.g., ink) storage member for coating tools to reduce the consumption of plastic and the environmental impact by substituting paper base material for plastics such as polypropylene. The liquid storage member has at least three layers as follows: an inner layer made of paper base material and an intermediate layer of a paper base laminate comprising a metal layer or a silica vapor deposition layer formed on the outer surface side of the paper-based inner layer; and an outer layer made of paper base material formed on the outer surface side of the intermediate layer. The paper base laminate is wound into a spiral shape and on the outer surface side of the intermediate layer, the outer layer is also wound into a spiral shape. A polyolefin resin-containing adhesive layer lies in between the inner and intermediate layers and/or between the intermediate and outer layers.Type: ApplicationFiled: December 17, 2021Publication date: February 8, 2024Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Saki TANAKA, Takayuki YAMAGUCHI, Yuichi INAGAWA
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Patent number: 11890363Abstract: A liquid cosmetic composition which provides easily a clear and brilliant coating film without causing flaky pigments to be overlapped on each other when the liquid cosmetic composition containing a small amount of brilliant flaky pigments is filled in an applicator having a coating part composed of a brush to be coated on a surface such as a skin. The liquid cosmetic composition of the present invention is characterized in containing at least 0.01 to 10 mass % of a flaky pigment coated on a surface with a compound selected from the following A group, 0.05 to 5 mass % of layered clay mineral particles, 1 to 20 mass % of an acrylic copolymer in terms of a solid content and water and being filled in an applicator provided with a coating part having a brush: A group: cellulose, hemicellulose, lignin, chitin, chitosan.Type: GrantFiled: July 8, 2020Date of Patent: February 6, 2024Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Satoshi Sakuma, Yuichi Yamazaki
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Patent number: 11884093Abstract: A mechanical pencil includes a ball chuck, a rotation drive mechanism having a rotary part and receiving an axial direction retraction operation due to writing pressure received by the lead held by the ball chuck and an axial direction advance operation due to release of the writing pressure to drive the rotary part to rotate in one direction, a feed cam face having a ring-shaped cam face vertical to the axial direction and an axial direction step part, and a slider having an abutting part abutting against the feed cam face and a holding chuck holding a lead and rotating upon receiving a rotation drive force of the rotary part, which is configured so that the lead held by the holding chuck is pulled out from the ball chuck due to the advance operation of the slider.Type: GrantFiled: February 20, 2020Date of Patent: January 30, 2024Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Takamasa Fukuda, Yusuke Koizumi
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Publication number: 20230406029Abstract: Provided is a fiber-bundled part for writing instruments having excellent strength and durability, as well as a pen tip and a writing instrument using the fiber-bundled part, which can be suitably used for pen tips, ink feed cores and relay cores of writing instruments such as marking pens and felt-tip pens. The fiber-bundled part for writing instruments of the present disclosure is used for the ink feed core leading to the pen tip or a writing pen core, and comprises a multifilament of long fibers having different melting points, and the multifilament at least contain crimped fibers.Type: ApplicationFiled: October 7, 2021Publication date: December 21, 2023Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Toshihiro TAKAHASHI, Toshimi KAMITANI, Hirotake IZAWA
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Publication number: 20230398808Abstract: A pencil lead may achieve high levels of both improved density and improved fixability of a hand-drawn line and also be less likely to stain a hand during writing. Examples of this pencil lead include a pencil lead comprising a black porous fired lead body including at least graphite, wherein at least a compound selected from octyldodecyl erucate, oleyl oleate, octyldodecyl oleate, isopropyl palmitate, 2-ethylhexyl palmitate, and propylene glycol monooleate is impregnated in pores of the porous fired lead body. The pores of the black porous fired lead body are preferably impregnated with at least one selected from a terpene phenolic resin, a rosin ester resin, a ketone resin, and a rosin-modified phenolic resin, in addition to the compound.Type: ApplicationFiled: October 5, 2021Publication date: December 14, 2023Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Hiroyuki ARAI, Ryota KUBO, Masaaki MATSUMOTO
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Publication number: 20230398055Abstract: A marker composition suitable for skin may use a dye with good color development, which is capable of preventing color separation and also preventing absorption of the dye into the skin or the like. Such a marker composition may contain at least 1 to 5 mass % of an acid dye, an aminoalkyl (meth)acrylate copolymer, a water-soluble organic solvent, and water. The pH may be lower than 7.0. The aminoalkyl (meth)acrylate copolymer may be a copolymer polymerized from monomers selected from Group A (ethyl (meth)acrylate, methyl (meth)acrylate, n-propyl (meth)acrylate, and the like) and from Group B (2-(dimethylamino)ethyl (meth)acrylate, 2-(diethylamino)ethyl (meth)acrylate, and 3-(dimethylamino)propyl (meth)acrylate) respectively, and a ratio of the monomer of the group B may be 2 to 20 mass % in the copolymer.Type: ApplicationFiled: October 22, 2021Publication date: December 14, 2023Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Kensuke INOUE, Wataru SAGAWA, Hisato HAGA
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Publication number: 20230347683Abstract: To provide a clicking type writing instrument capable of reliably suppressing volatilization of ink from the pen tip at least before the start of use. The clicking type writing instrument A has a refill 20 provided in a barrel cylinder 10; a pen tip 30 configured to discharge ink from an ink storage member 18 accommodated in the refill 20 by capillary action and to be allowed to be projected from and retracted into a front end of the barrel cylinder 10 by means of a clicking mechanism 70 provided in the barrel cylinder 10; and at least a seal member 40, arranged around an outer periphery of the pen tip 30 near a front end side of the pen tip, and formed with a through-hole 42 in a center of the seal member, through which the pen tip 30 can slidably move back and forth when the pen tip 30 is housed inside the barrel cylinder 10.Type: ApplicationFiled: July 15, 2021Publication date: November 2, 2023Applicant: MITSUBISHI PENCIL COMPANY, LIMITEDInventor: Toru NAKAJIMA
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Patent number: 11795336Abstract: This oil-based ink composition for writing implements contains a colorant, a resin, an organic solvent, and fluorine-based resin particles, the average particle size of the fluorine-based resin particles being at least 0.1 ?m and less than 1.0 ?m when measured by a dynamic light scattering method.Type: GrantFiled: March 12, 2018Date of Patent: October 24, 2023Assignee: Mitsubishi Pencil Company, LimitedInventor: Yumiko Haruhara
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Patent number: 11787225Abstract: Provided is an erasing tool which produces no eraser crumbs and allows a progress for adsorption of even a light color of color pencil leads and the like to be recognized at a glance and which makes it possible to surely erase the color of color pencil lead and has a high light transmittance. The erasing tool is characterized by containing a secondary aggregate having a diameter of 1 to 100 ?m with a petaloid particle as a primary particle.Type: GrantFiled: April 11, 2018Date of Patent: October 17, 2023Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Ryosuke Matsushima, Satoru Banzai
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Patent number: 11780258Abstract: Provided is a liquid storage member for coating tools which successfully reduces plastic consumption and reduces environmental loads, by making use of materials based on paper in place of plastics such as polypropylene that has been used for liquid (e.g., ink) storage members. A liquid storage member for coating tools having at least three layers of a paper base laminate composed of an inner layer made of paper base material, and a middle layer of a metal layer or a silica deposition layer, formed on the outer peripheral side of the inner layer; and an outer layer made of the paper base material formed on the outer peripheral side of the middle layer, wherein the paper base material of the inner layer has a density of 0.8 g/cm3 or more.Type: GrantFiled: April 10, 2020Date of Patent: October 10, 2023Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Shuji Ichikawa, Shinobu Kajiyama, Takeshi Iimori, Takayuki Yamaguchi
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Patent number: 11766110Abstract: An applicator which comprises an application body arranged inside the front part of a barrel cylinder supplying the application body with the application liquid stored in a storage portion in the barrel cylinder, and is configured such that: a full coupling portion and a temporary coupling portion are formed on each of a front barrel and the barrel cylinder; the front barrel and the barrel cylinder each have an anti-rotation rib; the anti-rotation ribs are not engaged with each other in the initial coupled state before the temporary coupled state in which the temporary coupling portions of the barrel cylinder and the front barrel are engaged with each other; and, the anti-rotation ribs become engaged with each other in the fully coupled state in which the full coupling portions are engaged with each other.Type: GrantFiled: March 13, 2020Date of Patent: September 26, 2023Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventor: Jun Nakada
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Patent number: D998708Type: GrantFiled: August 4, 2021Date of Patent: September 12, 2023Assignee: MITSUBISHI PENCIL COMPANY, LIMITEDInventors: Pablo Puga, Kei Oomoto