Patents by Inventor Chang-Mo Chung
Chang-Mo Chung 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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Patent number: 11028046Abstract: The present invention relates to a toluene diisocyanate purification method enabling acquisition of a product having a small amount of dimers in a final product by means of using a reactive dividing wall column during toluene diisocyanate preparation. More particularly, according to the present invention, in order to obtain a product having a small amount of dimers in accordance with a reversible reaction of a monomer and a dimer, a purification procedure is designed by means of applying the temperature, pressure, time of stay and the like of a reactive dividing wall column as appropriate particular conditions, a reboiler having short time of stay and high heat transfer rate is used, and thus a dimerization reaction is inhibited and the purity and yield of the product are enhanced. Therefore, high-purity toluene diisocyanate can be purified and obtained.Type: GrantFiled: December 12, 2017Date of Patent: June 8, 2021Assignee: HANWHA CHEMICAL CORPORATIONInventors: Hyun Cheol Ryu, Kee Do Han, Seong Ho Park, Chang Mo Chung
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Publication number: 20200377447Abstract: The present invention relates to a toluene diisocyanate purification method enabling acquisition of a product having a small amount of dimers in a final product by means of using a reactive dividing wall column during toluene diisocyanate preparation. More particularly, according to the present invention, in order to obtain a product having a small amount of dimers in accordance with a reversible reaction of a monomer and a dimer, a purification procedure is designed by means of applying the temperature, pressure, time of stay and the like of a reactive dividing wall column as appropriate particular conditions, a reboiler having short time of stay and high heat transfer rate is used, and thus a dimerization reaction is inhibited and the purity and yield of the product are enhanced. Therefore, high-purity toluene diisocyanate can be purified and obtained.Type: ApplicationFiled: December 12, 2017Publication date: December 3, 2020Inventors: Hyun Cheol RYU, Kee Do HAN, Seong Ho PARK, Chang Mo CHUNG
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Patent number: 8407493Abstract: In a method of supplying power for a device wired adapter, a stand-alone USB device is connected to the device wired adapter for operating as a wireless USB device. The stand-alone USB device is set as a USB on-the-go host. The device wired adapter is set as a USB on-the-go device. Power is supplied to the device wired adapter by the stand-alone USB device. A USB on-the-go role of the device wired adapter is swapped with a USB on-the-go role of the stand-alone USB device.Type: GrantFiled: February 4, 2010Date of Patent: March 26, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-Mo Chung, Yon-Suk Kim
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Patent number: 8009643Abstract: An anti-collision method and system in a wireless network system are provided. The anti-collision method includes: transmitting a beacon signal including information related to an owner type of a first device and information related to an available time interval of the first device; transmitting information related to a time interval selected from the available time interval to a second device having receiving the beacon signal from the first device; and updating the information related to the available time interval using information related to the selected time interval. The information related to the owner type of the first device includes information indicating one of a unicast device and a multicast device.Type: GrantFiled: May 30, 2006Date of Patent: August 30, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-mo Chung, Yong-suk Kim
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Patent number: 7802047Abstract: A Universal Serial Bus (USB) device includes an internal circuit and an interface circuit. The interface circuit is configured to interface the internal circuit and an external device for wireless USB (WUSB) communication and USB communication. The interface circuit includes a WUSB module enabling the WUSB communication, an on-the-go (OTG) module enabling the USB communication, and an interface module configured to selectively control the WUSB module and the OTG module to interface the internal circuit and the external device for the WUSB communication and the USB communication.Type: GrantFiled: October 17, 2008Date of Patent: September 21, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-Mo Chung, Jun-Haeng Cho, Yon-Suk Kim
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Publication number: 20100230651Abstract: Disclosed is a method for preparing a metal oxide solid solution in nano size. The metal oxide solid solution is prepared by reacting a reactant mixture containing water and at least two water-soluble metal compounds at 200 to 700° C. under a pressure of 180 to 550 bar in a continuous manner, wherein the reactant mixture contains the metal compounds at an amount of 0.01 to 30% by weight in total and the solid solution has a crystallite size of 1 to 1,000 nm. The metal oxide solid solution is, in particular suitable as a UV light shielding agent or as an oxygen storage component.Type: ApplicationFiled: March 10, 2010Publication date: September 16, 2010Inventors: Wan-Jae Myeong, Kyu-Ho Song, Se-Woong Park, Joo-Hyeong Lee, Jin-Soo Baik, Chang-Mo Chung
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Publication number: 20100211805Abstract: In a method of supplying power for a device wired adapter, a stand-alone USB device is connected to the device wired adapter for operating as a wireless USB device. The stand-alone USB device is set as a USB on-the-go host. The device wired adapter is set as a USB on-the-go device. Power is supplied to the device wired adapter by the stand-alone USB device. A USB on-the-go role of the device wired adapter is swapped with a USB on-the-go role of the stand-alone USB device.Type: ApplicationFiled: February 4, 2010Publication date: August 19, 2010Inventors: Chang-Mo Chung, Yon-Suk Kim
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Patent number: 7754168Abstract: Disclosed are a concentrate of fine ceria particles for chemical mechanical polishing, and a method of preparing the same. The method includes reacting a reactant mixture comprising i) water, ii) an aqueous solution of water-soluble cerium salt compound, and iii) ammonia or ammonium salt at a reaction temperature of 250-700? under a reaction pressure of 180-550 bar for 0.01 sec to 10 min in a continuous reactor to obtain a solution containing the fine ceria particles, the cerium salt compound being contained at an amount of 0.01 to 20 wt % in the reactant mixture; and concentrating the solution containing the fine ceria particles in a concentrator having a filter with a pore size of 0.01 to 10?. The concentrate is advantageous in that a CMP slurry and a dispersing solution are easily produced by diluting the concentrate and adding an additive to the concentrate.Type: GrantFiled: May 21, 2004Date of Patent: July 13, 2010Assignee: Hanwha Chemical CorporationInventors: Se-Woong Park, Wan-Jae Myeong, Jin-Soo Baik, Chang-Mo Chung, Kyu-Ho Song
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Patent number: 7700059Abstract: Disclosed is a method for preparing a metal oxide solid solution in nano size. The metal oxide solid solution is prepared by reacting a reactant mixture containing water and at least two water-soluble metal compounds at 200 to 700° C. under a pressure of 180 to 550 bar in a continuous manner, wherein the reactant mixture contains the metal compounds at an amount of 0.01 to 30% by weight in total and the solid solution has a crystallite size of 1 to 1,000 nm. The metal oxide solid solution is, in particular suitable as a UV light shielding agent or as an oxygen storage component.Type: GrantFiled: May 21, 2004Date of Patent: April 20, 2010Assignee: Hanwha Chemical CorporationInventors: Wan-Jae Myeong, Kyu-Ho Song, Se-Woong Park, Joo-Hyeong Lee, Jin-Soo Baik, Chang-Mo Chung
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Patent number: 7689753Abstract: A method of operating a wireless universal serial bus (USB) apparatus and the wireless USB apparatus using the same. The method including: receiving operation state information from a neighboring wireless USB apparatus in a beacon period (BP); the wireless USB apparatus, which is operating as a host in a first cluster by using the operation state information, identifying a distributed reservation protocol (DRP) corresponding to a second cluster; and the wireless USB apparatus, which is operating as the host in the first cluster, participating in the second cluster as a device by transmitting and receiving data in the DRP corresponding to the second cluster. Accordingly, the wireless USB apparatus which operates as a host may participate in a neighboring WUSB cluster as a device.Type: GrantFiled: November 14, 2006Date of Patent: March 30, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Dong Won Kwak, Yong Suk Kim, Chang Mo Chung
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Publication number: 20100077105Abstract: A method for switching a dual role device (DRD) between the roles of a host and a device is provided. In the role switching method, when there is a request from a DRD desiring a role switch, a partner DRD may switch its own role. The role may be switched based on a plurality of consecutive micro-scheduled management commands (MMCs) or based on specific bit values included in a wireless universal serial bus (W-USB) application specific information element (ASIE) of a beacon slot. Therefore, the role switching method may reduce overhead by not having to simultaneously and continuously maintain a default link and a reverse link. The DRD may perform the role switching method.Type: ApplicationFiled: September 9, 2009Publication date: March 25, 2010Applicant: Samsung Electronics Co., LTD.Inventors: Chang Mo Chung, Yon Suk Kim
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Publication number: 20090125665Abstract: A Universal Serial Bus (USB) device includes an internal circuit and an interface circuit. The interface circuit is configured to interface the internal circuit and an external device for wireless USB (WUSB) communication and USB communication. The interface circuit includes a WUSB module enabling the WUSB communication, an on-the-go (OTG) module enabling the USB communication, and an interface module configured to selectively control the WUSB module and the OTG module to interface the internal circuit and the external device for the WUSB communication and the USB communication.Type: ApplicationFiled: October 17, 2008Publication date: May 14, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Chang-Mo CHUNG, Jun-Haeng CHO, Yon-Suk KIM
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Publication number: 20070260801Abstract: A method of operating a wireless universal serial bus (USB) apparatus and the wireless USB apparatus using the same. The method including: receiving operation state information from a neighboring wireless USB apparatus in a beacon period (BP); the wireless USB apparatus, which is operating as a host in a first cluster by using the operation state information, identifying a distributed reservation protocol (DRP) corresponding to a second cluster; and the wireless USB apparatus, which is operating as the host in the first cluster, participating in the second cluster as a device by transmitting and receiving data in the DRP corresponding to the second cluster. Accordingly, the wireless USB apparatus which operates as a host may participate in a neighboring WUSB cluster as a device.Type: ApplicationFiled: November 14, 2006Publication date: November 8, 2007Inventors: Dong Won Kwak, Yong Suk Kim, Chang Mo Chung
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Publication number: 20070212289Abstract: Disclosed are a concentrate of fine ceria particles for chemical mechanical polishing, and a method of preparing the same. The method includes reacting a reactant mixture comprising i) water, ii) an aqueous solution of water-soluble cerium salt compound, and iii) ammonia or ammonium salt at a reaction temperature of 250-700 ? under a reaction pressure of 180-550 bar for 0.01 sec to 10 min in a continuous reactor to obtain a solution containing the fine ceria particles, the cerium salt compound being contained at an amount of 0.01 to 20 wt % in the reactant mixture; and concentrating the solution containing the fine ceria particles in a concentrator having a filter with a pore size of 0.01 to 10 ?. The concentrate is advantageous in that a CMP slurry and a dispersing solution are easily produced by diluting the concentrate and adding an additive to the concentrate.Type: ApplicationFiled: May 21, 2004Publication date: September 13, 2007Inventors: Se-Woong Park, Wan-Jae Myeong, Jin-Soo Baik, Chang-Mo Chung
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Patent number: 7235224Abstract: Disclosed is a process for preparing fine metal oxide particles, comprising the following steps of reacting a reactant mixture comprising i) water, ii) at least one water-soluble metal nitrate and iii) ammonia or ammonium salt at 250–700° C. under 180–550 bar for 0.01 sec to 10 min in a reaction zone to synthesize the metal oxide particles, the metal nitrate being contained at an amount of 0.01–20 wt % in the reactant mixture; and separating and recovering the metal oxide particles from the resulting reaction products. According to the present invention, nano-sized metal oxide particles are synthesized, while the harmful by-products generated concurrently therewith are effectively decomposed in the same reactor.Type: GrantFiled: July 8, 2003Date of Patent: June 26, 2007Assignee: Han-Wha Chemical CorporationInventors: Wan-Jae Myeong, Jin-Soo Baik, Se-Woong Park, Chang-Mo Chung, Kyu-Ho Song
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Publication number: 20070116031Abstract: An anti-collision method and system in a wireless network system are provided. The anti-collision method includes: transmitting a beacon signal including information related to an owner type of a first device and information related to an available time interval of the first device; transmitting information related to a time interval selected from the available time interval to a second device having receiving the beacon signal from the first device; and updating the information related to the available time interval using information related to the selected time interval. The information related to the owner type of the first device includes information indicating one of a unicast device and a multicast device.Type: ApplicationFiled: May 30, 2006Publication date: May 24, 2007Inventors: Chang-mo Chung, Yong-suk Kim
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Publication number: 20070067628Abstract: An association method and system in a network system are provided. The association method is for data exchange between a host and a device in a network system, and includes measuring a distance between the device and the host, and transmitting a connection context required for association with the device if the distance is smaller than a threshold. According to the association method, since a series of processes for the association of the device with the host is performed intuitively, the a user's convenience in using the device can be maximized.Type: ApplicationFiled: June 21, 2006Publication date: March 22, 2007Inventors: Yong-suk Kim, Chang-mo Chung
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Publication number: 20070042526Abstract: Disclosed is a method for preparing a metal oxide solid solution in nano size. The metal oxide solid solution is prepared by reacting a reactant mixture containing water and at least two water-soluble metal compounds at 200 to 700° C. under a pressure of 180 to 550 bar in a continuous manner, wherein the reactant mixture contains the metal compounds at an amount of 0.01 to 30% by weight in total and the solid solution has a crystallite size of 1 to 1,000 nm. The metal oxide solid solution is, in particular suitable as a UV light shielding agent or as an oxygen storage component.Type: ApplicationFiled: May 21, 2004Publication date: February 22, 2007Inventors: Wan-Jae Myeong, Kyu-Ho Song, Se-Woong Park, Joo-Hyeong Lee, Jin-Soo Baik, Chang-Mo Chung