Patents by Inventor Dong Han Seo
Dong Han Seo 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: 20240076468Abstract: An embodiment resin composition for shielding electromagnetic waves, based on a total weight of the resin composition, includes 20 to 80 wt % of thermoplastic resin, 1 to 50 wt % of a conductive filler, and 0.1 to 30 wt % of an additive.Type: ApplicationFiled: January 16, 2023Publication date: March 7, 2024Inventors: Seung-Woo Choi, Dong-Bum Seo, Kyun Oh, Yu-Hyun Song, Yang-Jin Kwon, Joo-Han Lee
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Patent number: 11885012Abstract: The invention relates to methods for the production of high quality graphene. In particular, the invention relates to single-step thermal methods which can be carried out in an ambient-air or vacuum environment using renewable biomass as a carbon source. Specifically, the invention comprises heating a metal substrate and carbon source in a sealed ambient environment to a temperature which produces carbon vapour from the carbon source such that the vapour comes into contact with the metal substrate, maintaining the temperature for a time sufficient to form a graphene lattice and then cooling the substrate at a controlled rate to form a deposited graphene.Type: GrantFiled: June 8, 2021Date of Patent: January 30, 2024Assignee: Commonwealth Scientific and Industrial Research OrganizationInventors: Dong Han Seo, Shafique Pineda, Zhao Jun Han, Kostyantyn Ostrikov
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Publication number: 20210292891Abstract: The invention relates to methods for the production of high quality graphene. In particular, the invention relates to single-step thermal methods which can be carried out in an ambient-air or vacuum environment using renewable biomass as a carbon source. Specifically, the invention comprises heating a metal substrate and carbon source in a sealed ambient environment to a temperature which produces carbon vapour from the carbon source such that the vapour comes into contact with the metal substrate, maintaining the temperature for a time sufficient to form a graphene lattice and then cooling the substrate at a controlled rate to form a deposited graphene.Type: ApplicationFiled: June 8, 2021Publication date: September 23, 2021Applicant: Commonwealth Scientific and Industrial Research OrganisationInventors: Dong Han Seo, Shafique Pineda, Zhao Jun Han, Kostyantyn Ostrikov
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Patent number: 11060185Abstract: The invention relates to methods for the production of high quality graphene. In particular, the invention relates to single-step thermal methods which can be carried out in an ambient-air or vacuum environment using renewable biomass as a carbon source. Specifically, the invention comprises heating a metal substrate and carbon source in a sealed ambient environment to a temperature which produces carbon vapour from the carbon source such that the vapour comes into contact with the metal substrate, maintaining the temperature for a time sufficient to form a graphene lattice and then cooling the substrate at a controlled rate to form a deposited graphene.Type: GrantFiled: August 12, 2016Date of Patent: July 13, 2021Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Dong Han Seo, Shafique Pineda, Zhao Jun Han, Kostyantyn Ostrikov
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Publication number: 20200261858Abstract: Continuous permeable graphene films having 2 or more layers of graphene and wherein nanochannels or nanopores extend through said film. Each nanochannel is comprised of a fluidly connected series of gaps between edge mismatches of adjacent graphene grains within said 2 or more layer adjacent sheets, said nanochannels providing a fluid passage from one face of the permeable graphene film to the other. Also, membranes including a permeable support membrane overlaid by a continuous permeable graphene film and processes for the preparation of said membranes. Also the use of said membranes in water purification and desalination, for example.Type: ApplicationFiled: March 6, 2018Publication date: August 20, 2020Inventors: Dong Han Seo, Shafique Pineda, Adrian Murdock, Zhao Jun Han, Kostyantyn Ostrikov, Ming Xie, Timothy Van der Laan
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Publication number: 20190003042Abstract: The invention relates to methods for the production of high quality graphene. In particular, the invention relates to single-step thermal methods which can be carried out in an ambient-air or vacuum environment using renewable biomass as a carbon source. Specifically, the invention comprises heating a metal substrate and carbon source in a sealed ambient environment to a temperature which produces carbon vapour from the carbon source such that the vapour comes into contact with the metal substrate, maintaining the temperature for a time sufficient to form a graphene lattice and then cooling the substrate at a controlled rate to form a deposited graphene.Type: ApplicationFiled: August 12, 2016Publication date: January 3, 2019Applicant: Commonwealth Scientific and Industrial Research OrganisationInventors: Dong Han Seo, Shafique Pineda, Zhao Jun Han, Kostyantyn Ostrikov
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Patent number: 7580532Abstract: Disclosed are multi-channel PWM (Pulse Width Modulation) apparatuses and methods for modulating PCM-based multi-channel audio signals read from an optical medium into PWM-based multi-channel audio signals. A multi-channel PWM apparatus and method can reduce noise from amplifying PCM-based audio signals having adjacent signal processing paths. The multi-channel PWM apparatus and method selectively vary only gains of some channels in a plurality of channels in order to allow an audio signal applied to a pulse width modulator to have a different level in individual channels in a prescribed system condition (e.g., overload). The multi-channel PWM apparatus can selectively enable a subset among a plurality of pulse width modulators to reduce unnecessary driving and noise. Thus, preferred embodiments can reduce or prevent deterioration of output audio signals.Type: GrantFiled: July 29, 2003Date of Patent: August 25, 2009Assignee: LG Electronics Inc.Inventors: Dong Han Seo, Oh Suk Kwon, Jong Woo Kim, Jae Gun Lee, Chan Tae Kim
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Patent number: 7245896Abstract: An apparatus for improving reception sensitivity of a public wave receiver includes power devices formed in a power supply of the public wave receiver, and a shielding plate for shielding noise generated by the power devices. A signal line for connecting an antenna used for the public wave receiver to a public wave receiver main body and a ground line are formed coaxially to each other by a shield layer.Type: GrantFiled: June 23, 2003Date of Patent: July 17, 2007Assignee: LG Electronics Inc.Inventors: Dong Han Seo, Jong Woo Kim, Chan Tae Kim, Oh Suk Kwon, Jae Geun Lee
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Publication number: 20040028243Abstract: Disclosed are multi-channel PWM (Pulse Width Modulation) apparatuses and methods for modulating PCM-based multi-channel audio signals read from an optical medium into PWM-based multi-channel audio signals. A multi-channel PWM apparatus and method can reduce noise from amplifying PCM-based audio signals having adjacent signal processing paths. The multi-channel PWM apparatus and method selectively vary only gains of some channels in a plurality of channels in order to allow an audio signal applied to a pulse width modulator to have a different level in individual channels in a prescribed system condition (e.g., overload). The multi-channel PWM apparatus can selectively enable a subset among a plurality of pulse width modulators to reduce unnecessary driving and noise. Thus, preferred embodiments can reduce or prevent deterioration of output audio signals.Type: ApplicationFiled: July 29, 2003Publication date: February 12, 2004Applicant: LG Electronics Inc.Inventors: Dong Han Seo, Oh Suk Kwon, Jong Woo Kim, Jae Gun Lee, Chan Tae Kim
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Publication number: 20040014508Abstract: An apparatus for improving reception sensitivity of a public wave receiver includes power devices formed in a power supply of the public wave receiver, and a shielding plate for shielding noise generated by the power devices. A signal line for connecting an antenna used for the public wave receiver to a public wave receiver main body and a ground line are formed coaxially to each other by a shield layer.Type: ApplicationFiled: June 23, 2003Publication date: January 22, 2004Inventors: Dong Han Seo, Jong Woo Kim, Chan Tae Kim, Oh Suk Kwon, Jae Geun Lee