Patents Assigned to PILOT CORPORATION
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Patent number: 11179963Abstract: A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.Type: GrantFiled: October 21, 2019Date of Patent: November 23, 2021Assignees: THE PILOT INK CO., LTD., KABUSHIKI KAISHA PILOT CORPORATIONInventor: Yoshihiro Ito
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Publication number: 20210253886Abstract: The present invention provides: a highly practical and safe oil-based ink composition for a writing board, said composition being capable of imparting high mark-erasability and having excellent resistance to drying up; and a marking pen incorporating the same. Specifically, the present invention provides: an oil-based ink composition for a writing board, said composition containing a pigment, an organic solvent, a resin, and at least one compound selected from compounds represented by general formula (1) or (2); and a marking pen obtained by incorporating the oil-based ink composition for a writing board. (In the formulae, R1-R4 each represent a C6-18 alkyl group or a C2-18 and O2-10 alkoxypolyglycol group.Type: ApplicationFiled: April 24, 2019Publication date: August 19, 2021Applicants: Kabushiki Kaisha Pilot Corporation (Also Trading as Pilot Corporation), The Pilot Ink Company, LimitedInventor: Katsuhisa ASADA
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Patent number: 11015076Abstract: An ink composition for a reversibly thermochromic stamp including a reversibly thermochromic microencapsulated pigment encapsulating a reversibly thermochromic composition including: Component (A): an electron-donating color-developing organic compound, Component (B): an electron-accepting compound, and Component (C): a reaction medium causing reversibly an electron transfer reaction between the Component (A) and the Component (B) in a specific temperature range, water and a thickener.Type: GrantFiled: April 23, 2015Date of Patent: May 25, 2021Assignees: KABUSHIKI KAISHA PILOT CORPORATION, THE PILOT INK CO., LTD.Inventors: Akio Nakashima, Hiroshi Umemoto, Taeko Ozawa
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Patent number: 10927270Abstract: An oil-based ink composition for a writing instrument, comprising a dye, an organic solvent and a phenolic compound of the following general formula (1): wherein R is each independently hydrogen or an alkyl group having 1 to 5 carbon atoms, R1 is any of an alkyl group having 1 to 5 carbon atoms, a halogenated alkyl group having 1 to 5 carbon atoms, a phenyl group, a hydroxyphenyl group, and an alkyl group having 1 to 5 carbon atoms substituted by a hydroxyphenyl group, and R2 is any of a halogenated alkyl group having 1 to 5 carbon atoms, a phenyl group, a hydroxyphenyl group, and an alkyl group having 1 to 5 carbon atoms substituted by a hydroxyphenyl group. The oil-based ink composition for a writing instrument can form handwriting having excellent water resistance in which no bleeding occurs on written surfaces of various materials with a dye retaining color development.Type: GrantFiled: May 25, 2016Date of Patent: February 23, 2021Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Hisashi Nakamura
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Publication number: 20200325351Abstract: To provide a reversibly thermochromic aqueous ink composition excellent in dispersion stability of a reversibly thermochromic microcapsule pigment and a writing instrument using the same. Disclosed is a reversibly thermochromic aqueous ink composition comprising a reversibly thermochromic microcapsule pigment encapsulating a reversibly thermochromic composition comprising (a) an electron-donating color-developing organic compound, (b) an electron-accepting compound, and (c) a reaction medium to determine an occurrence temperature of a coloring reaction of the component (a) and the component (b), and a vehicle comprising water and a specific gravity adjuster selected from the group consisting of an oxyacid belonging to Group 6 having an atomic weight of 90 to 185 or salt thereof.Type: ApplicationFiled: October 16, 2018Publication date: October 15, 2020Applicants: KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION), THE PILOT INK CO., LTD.Inventors: Katsuyuki FUJITA, Yasuaki KAMBE, Masayuki MITA, Tomoyuki YAMAMURA
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Patent number: 10787025Abstract: A thermochromic writing tool which includes a writing element including a reservoir in which thermochromic ink is retained, and a writing point portion which is disposed on a front end portion of the reservoir and from which the thermochromic ink is dischargeable; a barrel which is made of a resin and in which the writing element is accommodated so as to be movable in a longitudinal direction; a protruding and retracting mechanism including a push element made of a resin and disposed on a rear end portion of the barrel so as to be tiltable in a radial direction relative to an axis of the barrel; and a rub portion disposed on a rear end portion of the push element 5.Type: GrantFiled: December 15, 2017Date of Patent: September 29, 2020Assignee: Kabushiki Kaisha Pilot CorporationInventor: Masahiro Kogure
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Publication number: 20200248019Abstract: The present invention provides a water-based ink composition for a ballpoint pen that is less likely to cause bleeding of a written trace in writing, provides a favorable written trace without causing no blurring or line splitting, and excels in the storage stability of the ink composition; and a water-based ballpoint pen using the ink composition. A water-based ink composition for a ballpoint pen comprising water, a coloring agent, a copolymer having a specific structure; and a water-based ballpoint pen using the ink composition.Type: ApplicationFiled: October 23, 2018Publication date: August 6, 2020Applicant: KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)Inventor: Taro TOZUKA
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Patent number: 10711147Abstract: The present invention provides an aqueous writing ink composition capable of forming handwriting having both opacity and transparency, also a writing implement using the composition, and further a process for producing the composition. The aqueous writing ink composition according to the present invention comprises a white pigment, resin particles containing styrene-acrylonitrile, a colorant, and a polysaccharide. The content of the white pigment X %, that of the resin particles Y1% and that of the polysaccharide Y2% satisfy the conditions of 0.1?X?7,??[1] 0.5<(Y1+Y2)/X, and??[2] 10?2.5X+(Y1+Y2)?40.Type: GrantFiled: May 24, 2019Date of Patent: July 14, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventors: Takashi Ohno, Aya Okoshi
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Patent number: 10569595Abstract: The present invention is a direct liquid type of writing tool including a pen tip; a columnar ink absorbent body connected to a rear end of the pen tip; an ink tank arranged on the ink absorbent body; and a plurality of communicating tubes for connecting the absorbent body and the ink tank. A front end of each of the communicating tubes is located in the ink absorbent body, and has a sloped surface facing an outer periphery side of the absorbent body. Each of the communicating tubes has an opening in the sloped surface at the front end and each has a tip end region adjacent to the opening and extending more frontward than the opening, and the tip end region forms a pressing part configured to press inside of the absorbent body when each of the tubes is inserted frontward from a rear end of the absorbent body.Type: GrantFiled: June 13, 2016Date of Patent: February 25, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Tetsuhiro Kurita
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Patent number: 10556459Abstract: A writing instrument excellent in handwriting density and temporal stability. The writing instrument includes a ball-point pen tip attached to the front end portion of the ink storage cylinder; and a ball-point pen refill having an ink composition for a writing instrument loaded therein. The ink composition for the writing instrument is a thermochromic ink containing at least a thermochromic microcapsule pigment. The writing instrument includes a pressurization mechanism for applying a pressure to the back end of the ink composition for the writing instrument.Type: GrantFiled: December 22, 2016Date of Patent: February 11, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATION (ALSO TRADING AS PILOT CORPORATION)Inventors: Takumi Kajiwara, Naoto Masushige
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Patent number: 10538124Abstract: A retractable writing instrument includes a push member including a clip and a protruding and retracting mechanism that causes a pen point to protrude from and retract into a front end of the barrel at a frontward press on the push member, without the push member rotating with respect to the instrument. The protruding and retracting mechanism includes cam teeth and cam grooves formed in an inner face of the barrel, a rotary member including protuberances engageable alternately with the cam teeth or the cam grooves, a cam member connected to the push member and includes cam projections rotating the rotary member, and engagement projections engaged with the cam grooves in the inner face of the barrel so as to be movable in the longitudinal direction; and a resilient element that biases the writing element rearward. The push member and the cam member are in detent engagement with each other.Type: GrantFiled: December 5, 2016Date of Patent: January 21, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Yoshihiro Ito
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Patent number: 10500891Abstract: A mechanical pencil including: a body cylinder; a lead releasing unit configured to release a writing lead and having a rear region supported inside the body cylinder such that a front region thereof is flexurally deformable or tiltable inside the body cylinder; and a stretchable elastic body arranged between the lead releasing unit and a body cylinder, in which the lead releasing unit has a pressed portion on an outer circumferential surface of the front region, the body cylinder has a pressing portion in a front region, the pressing portion and the pressed portion abut on each other before the front region of the lead releasing unit is flexurally deformed or tilted, and the pressing portion causes the pressed portion to relatively move to the rear side with respect to the body cylinder when the front region of the lead releasing unit is flexurally deformed or tilted.Type: GrantFiled: June 24, 2016Date of Patent: December 10, 2019Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventors: Takumi Kajiwara, Nobukazu Seri, Atushi Ishikawa, Yuji Kawarazaki
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Publication number: 20190367755Abstract: The present invention provides an aqueous writing ink composition capable of forming handwriting having both opacity and transparency, also a writing implement using the composition, and further a process for producing the composition. The aqueous writing ink composition according to the present invention comprises a white pigment, resin particles containing styrene-acrylonitrile, a colorant, and a polysaccharide. The content of the white pigment X %, that of the resin particles Y1% and that of the polysaccharide Y2% satisfy the conditions of 0.1?X?7,??[1] 0.5<(Y1+Y2)/X, and??[2] 10?2.5X+(Y1+Y2)?40.Type: ApplicationFiled: May 24, 2019Publication date: December 5, 2019Applicant: KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)Inventors: Takashi OHNO, Aya OKOSHI
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Patent number: 10493791Abstract: A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.Type: GrantFiled: December 4, 2017Date of Patent: December 3, 2019Assignees: THE PILOT INK CO., LTD., KABUSHIKI KAISHA PILOT CORPORATIONInventor: Yoshihiro Ito
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Patent number: 10145814Abstract: In order to improve the endurance of this internal solution for a reference electrode beyond that in the prior art, the solution is made to contain a copolymerized material of a crosslinker having a plurality of non-acrylamide functional groups, and a non-acrylamide monofunctional hydrophilic monomer.Type: GrantFiled: January 30, 2015Date of Patent: December 4, 2018Assignees: KABUSHIKI KAISHA PILOT CORPORATION, HORIBA ADVANCED TECHNO, CO., LTD.Inventors: Taro Tozuka, Yuji Nishio, Akio IShii
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Patent number: D832348Type: GrantFiled: September 27, 2016Date of Patent: October 30, 2018Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Genki Iwao
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Patent number: D877250Type: GrantFiled: June 6, 2018Date of Patent: March 3, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Genki Iwao
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Patent number: D884789Type: GrantFiled: June 6, 2018Date of Patent: May 19, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Genki Iwao
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Patent number: D886193Type: GrantFiled: May 29, 2018Date of Patent: June 2, 2020Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Naomi Matsumura
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Patent number: D941921Type: GrantFiled: March 6, 2020Date of Patent: January 25, 2022Assignee: KABUSHIKI KAISHA PILOT CORPORATIONInventor: Akinori Ikeda