Patents by Inventor Ka Wai Jim
Ka Wai Jim 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: 20230381551Abstract: A respirator (100) includes a face mask (130), a porous filter (230) comprising a filtration material, an air flow system (120) in fluid communication with the porous filter (230) and the face mask (130), and an oxidant generator (850) configured to produce at least one oxidant. The air flow system (120) includes an enclosed container (121) and a blower (310) housed within the enclosed container (121). The air flow system (120) is configured to generate a flow of air such that ambient air passes through the porous filter (230) to the face mask (130). At least one contaminant in the flow of air is adsorbed by the porous filter (230), and the filtration material catalyzes an oxidation reaction between the oxidant and the contaminant to promote decomposition of the contaminant on the porous filter (230). According to another aspect, provided is an air purification system including at least one respirator (100) and a decontamination device (800).Type: ApplicationFiled: October 27, 2021Publication date: November 30, 2023Inventors: Rudy Chi Keung CHAN, Ka Wai JIM
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Publication number: 20230301884Abstract: In one aspect, provided is an aqueous antiseptic composition comprising glycerin 8.5-16%by weight; caprylyl glycol 0.45-3%by weight; and a first ingredient; wherein the first ingredient is acrylates/C10-30 about 0.01-0.1%by weight or ethoxydiglycol about 1-5% by weight. The glycerin, the caprylyl glycol and the first ingredient taken together form a first component. A sum of the first component is more than 13%by weight of the antiseptic composition. Other exemplary embodiments are also described. In certain embodiments, provided is an antiseptic composition useful for making skin or hand sanitizers that has a long-lasting, great antiseptic efficacy but at the same time having skin-moisturizing, low toxicity and low skin-irritating, hypo-allergenic properties, low inflammability, and low production cost.Type: ApplicationFiled: June 21, 2021Publication date: September 28, 2023Inventors: Ka Wai JIM, Rudy Chi Keung CHAN
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Publication number: 20230248873Abstract: In certain exemplary embodiments, an air purifier comprises a housing defining an enclosure and having an air entrance and an air exit; a particulate filter; a NCCO filter material configured to adsorb and decompose at least one gaseous pollutant; an AOG configured to generate at least one oxidant; an oxidant remover configured to remove at least one oxidant; a fan unit configured to generate airflow from the air entrance to the air exit; wherein the particulate filter, the NCCO filter material, the AOG, the oxidant remover and the fan unit are positioned within the enclosure such that during operation, a flow of air passes from the air entrance to the air exit through the particulate filter and the NCCO filter material along a direction of the flow of air. In certain embodiments, the air purifier may ensure safety to users while efficiency in removing contaminants can be greatly improved.Type: ApplicationFiled: April 14, 2023Publication date: August 10, 2023Inventors: Chi Keung Rudy CHAN, Ka Wai JIM, Lam Lung YEUNG
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Publication number: 20230158193Abstract: In certain exemplary embodiments, an air purifier comprises a housing defining an enclosure and having an air entrance and an air exit; a particulate filter; a NCCO filter material configured to adsorb and decompose at least one gaseous pollutant; an AOG configured to generate at least one oxidant; an oxidant remover configured to remove at least one oxidant; a fan unit configured to generate airflow from the air entrance to the air exit; wherein the particulate filter, the NCCO filter material, the AOG, the oxidant remover and the fan unit are positioned within the enclosure such that during operation, a flow of air passes from the air entrance to the air exit through the particulate filter and the NCCO filter material along a direction of the flow of air. In certain embodiments, the air purifier may ensure safety to users while efficiency in removing contaminants can be greatly improved.Type: ApplicationFiled: November 24, 2021Publication date: May 25, 2023Inventors: Chi Keung Rudy CHAN, Ka Wai JIM, Lam Lung YEUNG
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Patent number: 11648329Abstract: In certain exemplary embodiments, an air purifier comprises a housing defining an enclosure and having an air entrance and an air exit; a particulate filter; a NCCO filter material configured to adsorb and decompose at least one gaseous pollutant; an AOG configured to generate at least one oxidant; an oxidant remover configured to remove at least one oxidant; a fan unit configured to generate airflow from the air entrance to the air exit; wherein the particulate filter, the NCCO filter material, the AOG, the oxidant remover and the fan unit are positioned within the enclosure such that during operation, a flow of air passes from the air entrance to the air exit through the particulate filter and the NCCO filter material along a direction of the flow of air. In certain embodiments, the air purifier may ensure safety to users while efficiency in removing contaminants can be greatly improved.Type: GrantFiled: November 24, 2021Date of Patent: May 16, 2023Assignee: RHT LIMITEDInventors: Chi Keung Rudy Chan, Ka Wai Jim, Lam Lung Yeung
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Publication number: 20230126284Abstract: In one aspect, provided is an aqueous antiseptic composition comprising glycerin 8.5-16% by weight; caprylyl glycol 0.45-3% by weight; and a first ingredient; wherein the first ingredient is acrylates/C10-30 about 0.01-0.1% by weight or ethoxydiglycol about 1-5% by weight. The glycerin, the caprylyl glycol and the first ingredient taken together form a first component. A sum of the first component is more than 13% by weight of the antiseptic composition. Other exemplary embodiments are also described. In certain embodiments, provided is an antiseptic composition useful for making skin or hand sanitizers that have a long-lasting, great antiseptic efficacy but at the same time having skin-moisturizing, low toxicity and low skin-irritating, hypo-allergenic properties, low inflammability, and low production cost.Type: ApplicationFiled: December 22, 2022Publication date: April 27, 2023Inventors: Ka Wai JIM, Rudy Chi Keung CHAN
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Patent number: 8859698Abstract: A sulfur-containing macromolecule and a method of preparing the sulfur-containing macromolecule comprising a polymerization step are provided, where the sulfur-containing macromolecule contains internal units of formula (I) and the polymerization step is formula (II) wherein n is greater than 1, said precursor comprises alkyne having one or more acetylene groups and thiol having one or more thiol groups; and R is remainder of said thiol excluding said thiol groups, R? is remainder of said alkyne excluding said acetylene groups, and R and R? are selected from organic or organometallic groups.Type: GrantFiled: August 6, 2010Date of Patent: October 14, 2014Assignee: The Hong Kong University of Science and TechnologyInventors: Benzhong Tang, Ka Wai Jim, Anjun Qin, Wing Yip Lam, Jianzhao Liu
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Patent number: 8524858Abstract: Provided is a high temperature-resistant metal adhesive containing hyperbranched poly(triazole)s synthesized by in situ azide/alkyne click polymerization. Also provided is a method for preparing the same adhesives by in situ click polymerization of azide and alkyne monomers on metal substrates. The method is optimized to get high adhesive strength at room temperature or elevated temperatures by analyzing the effects of monomer ratio, curing temperature and time, and annealing temperature and time. The hyberbranched poly(triazole)s adhesive has comparable or better temperature resistance compared with known high temperature epoxy metal adhesives, and it is the first high temperature metal adhesive using hyperbranched poly(triazole)s prepared by in situ azide/alkyne click polymerization.Type: GrantFiled: January 5, 2011Date of Patent: September 3, 2013Assignee: The Hong Kong University of Science and TechnologyInventors: Benzhong Tang, Youhong Tang, Ka Wai Jim, Anjun Qin, Wing Yip Lam, Jie Li
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Patent number: 8436118Abstract: The present invention provides a new metal-free cyclotrimerization reaction of alkynes to produce a 1,3,5-triacylarylene or 1,3,5-triacylbenzene. This reaction is catalyzed by secondary amines, is strictly regioselective, highly functionality-tolerant, and the resulting product can be obtained in high yields. This reaction can be further applied for the preparation of novel branched (co)polymers bearing the triacylarylenes as structural units. The preparation of the (co)polymers is carried out as a one-pot single-step reaction procedure, giving branched oligomers and polymers in high yields up to 90%. The produced (co)polymers are also processible, easily film-forming, and thermally stable.Type: GrantFiled: March 4, 2008Date of Patent: May 7, 2013Assignee: The Hong Kong University of Science and TechnologyInventors: Benzhong Tang, Ka Wai Jim, Anjun Qin, Matthias Haeussler, Wing Yip Lam
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Publication number: 20120299474Abstract: Provided are a light emitting material comprising one or more tetraphenylethene (TPE) derivatives of formula (1a) with high thermal stability and high solid quantum yield efficiency, and an electroluminescent or light emitting device such as OLED comprising the same TPE derivatives and a method of preparing the same.Type: ApplicationFiled: March 1, 2011Publication date: November 29, 2012Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Benzhong Tang, Zujin Zhao, Ka Wai Jim, Wing Yip Lam, Shuming Chen, Hoi Sing Kwok
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Publication number: 20120148958Abstract: A sulfur-containing macromolecule and a method of preparing the sulfur-containing macromolecule comprising a polymerization step are provided, where the sulfur-containing macromolecule contains internal units of formula (I) and the polymerization step is formula (II) wherein n is greater than 1, said precursor comprises alkyne having one or more acetylene groups and thiol having one or more thiol groups; and R is remainder of said thiol excluding said thiol groups, R? is remainder of said alkyne excluding said acetylene groups, and R and R? are selected from organic or organometallic groups.Type: ApplicationFiled: August 6, 2010Publication date: June 14, 2012Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Benzhong Tang, Ka wai Jim, Anjun Qin, Wing Yip Lam, Jianzhao Liu
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Publication number: 20110171448Abstract: Provided is a high temperature-resistant metal adhesive containing hyperbranched poly(triazole)s synthesized by in situ azide/alkyne click polymerization. Also provided is a method for preparing the same adhesives by in situ click polymerization of azide and alkyne monomers on metal substrates. The method is optimized to get high adhesive strength at room temperature or elevated temperatures by analyzing the effects of monomer ratio, curing temperature and time, and annealing temperature and time. The hyberbranched poly(triazole)s adhesive has comparable or better temperature resistance compared with known high temperature epoxy metal adhesives, and it is the first high temperature metal adhesive using hyperbranched poly(triazole)s prepared by in situ azide/alkyne click polymerization.Type: ApplicationFiled: January 5, 2011Publication date: July 14, 2011Applicant: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Benzhong TANG, Youhong TANG, Ka Wai JIM, Anjun QIN, Wing Yip LAM, Jie LI
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Publication number: 20100129757Abstract: The present invention provides a new metal-free cyclotrimerization reaction of alkynes to produce a 1,3,5-triacylarylene or 1,3,5-triacylbenzene. This reaction is catalyzed by secondary amines, is strictly regioselective, highly functionality-tolerant, and the resulting product can be obtained in high yields. This reaction can be further applied for the preparation of novel branched (co)polymers bearing the triacylarylenes as structural units. The preparation of the (co)polymers is carried out as a one-pot single-step reaction procedure, giving branched oligomers and polymers in high yields up to 90%. The produced (co)polymers are also processible, easily film-forming, and thermally stable.Type: ApplicationFiled: March 4, 2008Publication date: May 27, 2010Applicant: The Hong Kong University of Science and TechnologyInventors: Benzhong Tang, Ka Wai Jim, Anjun Qin, Matthias Haeussler, Wing Yip Lam