Patents by Inventor Dong-ha Choi
Dong-ha Choi 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).
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Publication number: 20240109828Abstract: A method of removing a metal substance in a petrochemical product including: supplying a petrochemical product stream to an incoming tank through a supply pipe, circulating the petrochemical product stream through an incoming tank circulation pipe, and removing a metal substance included in the petrochemical product stream using a magnetic filter; transporting the petrochemical product stream to an outgoing tank through an incoming tank discharge pipe which is branched from the incoming tank circulation pipe and connected to an outgoing tank; circulating the petrochemical product stream through an outgoing tank circulation pipe provided in the outgoing tank and removing the metal substance included in the petrochemical product stream using a magnetic filter; and transporting the petrochemical product stream to a branch pipe branched from the outgoing tank circulation pipe to remove the metal substance using an ion exchange resin filter.Type: ApplicationFiled: August 12, 2021Publication date: April 4, 2024Inventors: Tae Woo Kim, Sung Kyu Lee, Byung Woo Choi, Hong Soo Joo, Dong Ha Lee
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Patent number: 11932993Abstract: A paper coating composition, methods for making the same, and a coated paper. The paper coating composition comprises a solvent, an ethylene-(meth)acrylic acid copolymer, a basic compound, and a polycarbodiimide-based curing agent, wherein the polycarbodiimide-based curing agent has a carbodiimide group equivalent of about 150 to about 350. The coating of the coated paper likewise comprises an ethylene-(meth)acrylic acid copolymer crosslinked by N-acylurea groups.Type: GrantFiled: May 26, 2023Date of Patent: March 19, 2024Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., Ltd.Inventors: Dong Hyun Woo, Sang Ha Son, Ji Hyeon Choi, Bu Yeon Hwang
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Publication number: 20240079182Abstract: A multilayer electronic component, in which an external electrode may include a base electrode layer disposed on a surface of a body of the multilayer electronic component and connected to internal electrodes of the body, an intermediate electrode layer disposed on a corner of the body and connected to the base electrode layer, a conductive resin layer disposed on the intermediate electrode layer, and a plating layer disposed on the conductive resin layer. The intermediate electrode layer may be in contact with the plating layer on the corner of the body to prevent an increase in ESR while preventing cracks due to mounting through the conductive resin layer.Type: ApplicationFiled: July 19, 2023Publication date: March 7, 2024Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Yoona Park, Kangha Lee, Hye Young Choi, Dong Ha Kang, Chul Seung Lee
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Patent number: 10306087Abstract: A hinge for a cover of an image forming apparatus has a hinge housing to be movably positioned into an opening in a body of the image forming apparatus, a hinge cam to couple to the cover and to pivotably couple to the hinge housing to support pivoting of the cover.Type: GrantFiled: June 26, 2018Date of Patent: May 28, 2019Assignee: HP PRINTING KOREA CO., LTD.Inventor: Dong-ha Choi
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Publication number: 20180302522Abstract: A hinge for a cover of an image forming apparatus has a hinge housing to be movably positioned into an opening in a body of the image forming apparatus, a hinge cam to couple to the cover and to pivotably couple to the hinge housing to support pivoting of the cover.Type: ApplicationFiled: June 26, 2018Publication date: October 18, 2018Applicant: S-PRINTING SOLUTION CO., LTD.Inventor: Dong-ha CHOI
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Patent number: 10033891Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: GrantFiled: November 17, 2016Date of Patent: July 24, 2018Assignee: S-PRINTING SOLUTION CO., LTD.Inventor: Dong-ha Choi
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Patent number: 9618894Abstract: An image forming apparatus having a compact size includes a printing medium supplying unit to hold printing media and to supply a printing medium, an image forming unit disposed above the printing medium supplying unit to form images on a printing medium, and a printing medium feeding part substantially formed in a letter āCā shape, having a part which extends to the image forming unit and which is inclined in a downward direction along a printing medium moving direction to feed the printing medium from the printing medium supplying unit to the image forming unit.Type: GrantFiled: December 9, 2014Date of Patent: April 11, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Dong-ha Choi
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Publication number: 20170070627Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: ApplicationFiled: November 17, 2016Publication date: March 9, 2017Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Dong-ha CHOI
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Patent number: 9527322Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: GrantFiled: January 27, 2014Date of Patent: December 27, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventor: Dong-ha Choi
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Patent number: 9141075Abstract: An image forming apparatus including: a first body including a developing unit to perform an image forming operation on a print medium, and a second body provided above the first body to pivot between a closed position and an open position in relation to the first body, the second body including a light emitting unit, wherein the light emitting unit is directly above the developing unit when the second body is in the closed position, and the developing unit is exposed to an outside of the image forming apparatus when the second body is in the closed position. A user can place the image forming apparatus on a desktop, which increases convenience in using the apparatus. Additionally, a specialized image forming apparatus can be provided to a user who mainly wants to print and copy in small quantities.Type: GrantFiled: May 14, 2012Date of Patent: September 22, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-ha Choi, Kiel-jae Hur, Young-min Kim
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Publication number: 20150093160Abstract: An image forming apparatus having a compact size includes a printing medium supplying unit to hold printing media and to supply a printing medium, an image forming unit disposed above the printing medium supplying unit to form images on a printing medium, and a printing medium feeding part substantially formed in a letter āCā shape, having a part which extends to the image forming unit and which is inclined in a downward direction along a printing medium moving direction to feed the printing medium from the printing medium supplying unit to the image forming unitType: ApplicationFiled: December 9, 2014Publication date: April 2, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Dong-ha CHOI
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Patent number: 8934831Abstract: An image forming apparatus, having a developing unit and a fusing unit are arranged to horizontally face the developing unit. A printing path between the developing unit and the fusing unit includes a guide unit having a downward slope to guide a printing medium immediately having passed through the transfer nip and an upward slope to guide the printing medium approaching the fusing nip. The fusing nip is located lower than the transfer nip.Type: GrantFiled: September 9, 2010Date of Patent: January 13, 2015Assignee: Samsung Electronics Co., Ltd.Inventor: Dong Ha Choi
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Patent number: 8743428Abstract: An image scanning unit an image forming apparatus having the same to scan an image recorded on a document. The image scanning unit includes: a transparent window on which a document to be scanned is laid; an image sensor running straightly under the transparent window for capturing an image recorded on the document, a unit for driving the image sensor; a guide shaft for guiding the straight movement of the image sensor; and an image sensor carrier connected to the driving unit and the guide shaft for straightly moving the image sensor along the guide shaft when the driving unit operates. The image sensor carrier has an image sensor mounting surface on which the image sensor is mounted, and a guide shaft holder integrally formed with the image sensor mounting surface and mounted on the guide shaft.Type: GrantFiled: October 12, 2005Date of Patent: June 3, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Dong-ha Choi
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Publication number: 20140137479Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: ApplicationFiled: January 27, 2014Publication date: May 22, 2014Applicant: Samsung Electronics Co., Ltd.Inventor: Dong-Ha CHOI
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Patent number: 8682219Abstract: An image forming apparatus to be placed on a desktop includes a first body, a second body which is pivotally mounted above the first body, a light emitting unit disposed in the second body, an image forming unit disposed in the first body so as to form a C-shaped paper feeding path, a first power supply unit and a second power supply unit disposed on a bottom surface of the first body, a controlling board disposed on a first side wall of the first body, and a power transmission unit disposed on a second side wall of the first body.Type: GrantFiled: October 18, 2012Date of Patent: March 25, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-ha Choi, Kiel-jae Hur
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Patent number: 8676110Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: GrantFiled: September 18, 2013Date of Patent: March 18, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Dong-Ha Choi
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Publication number: 20140016978Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: ApplicationFiled: September 18, 2013Publication date: January 16, 2014Applicant: Samsung Electronics Co., Ltd.Inventor: Dong-Ha CHOI
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Patent number: 8565662Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.Type: GrantFiled: October 16, 2012Date of Patent: October 22, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Dong-ha Choi
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Patent number: 8315540Abstract: An image forming apparatus to be placed on a desktop includes a first body, a second body which is pivotally mounted above the first body, a light emitting unit disposed in the second body, an image forming unit disposed in the first body so as to form a C-shaped paper feeding path, a first power supply unit and a second power supply unit disposed on a bottom surface of the first body, a controlling board disposed on a first side wall of the first body, and a power transmission unit disposed on a second side wall of the first body.Type: GrantFiled: March 14, 2008Date of Patent: November 20, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-ha Choi, Kiel-jae Hur
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Patent number: RE48261Abstract: An image scanning unit an image forming apparatus having the same to scan an image recorded on a document. The image scanning unit includes: a transparent window on which a document to be scanned is laid; an image sensor running straightly under the transparent window for capturing an image recorded on the document, a unit for driving the image sensor; a guide shaft for guiding the straight movement of the image sensor; and an image sensor carrier connected to the driving unit and the guide shaft for straightly moving the image sensor along the guide shaft when the driving unit operates. The image sensor carrier has an image sensor mounting surface on which the image sensor is mounted, and a guide shaft holder integrally formed with the image sensor mounting surface and mounted on the guide shaft.Type: GrantFiled: September 15, 2015Date of Patent: October 13, 2020Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventor: Dong-ha Choi