Patents by Inventor Xiang H. Wang
Xiang H. Wang 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: 11950036Abstract: An electronic device can include a housing defining an aperture and a display positioned in the aperture. The display and the housing can define an internal volume in which a speaker assembly is positioned. The speaker assembly can include a speaker module and a speaker enclosure in fluid communication, with the speaker enclosure at least partially defining a speaker volume.Type: GrantFiled: February 7, 2023Date of Patent: April 2, 2024Assignee: APPLE INC.Inventors: Paul X. Wang, Chanjuan Feng, Christopher Wilk, Dinesh C. Mathew, Keith J. Hendren, Stuart M. Nevill, Daniel K. Boothe, Nicholas A Rundle, Simon S. Lee, Xiang Zhang, Thomas H. Tsang, Rebecca J. Mikolajczyk
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Publication number: 20150267349Abstract: Wood pulp is treated with an esterase formulation in combination with a metal ion or cationic polymer to increase the stability or activity or both of esterase enzymes at high temperature, or at extreme pH ranges of acidic and alkaline conditions. The treatment by esterase together with metals ion or cationic polymer can be used to treat pitch containing pulp at high temperatures prior to, during or after refining of wood chip/pulp, in order to enhance the reduction of pitch problems and facilitate in the manufacture of paper.Type: ApplicationFiled: June 8, 2015Publication date: September 24, 2015Inventors: Xiang H. Wang, Jian Hua Ma, Chengliang Jiang, Howard Kaplan
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Patent number: 9051692Abstract: Wood pulp is treated with an esterase formulation in combination with a metal ion or cationic polymer to increase the stability or activity or both of esterase enzymes at high temperature, or at extreme pH ranges of acidic and alkaline conditions. The treatment by esterase together with metals ion or cationic polymer can be used to treat pitch containing pulp at high temperatures prior to, during or after refining of wood chip/pulp, in order to enhance the reduction of pitch problems and facilitate in the manufacture of paper.Type: GrantFiled: January 6, 2009Date of Patent: June 9, 2015Assignee: Enzymatic Deinking Technologies, L.L.C.Inventors: Xiang H. Wang, Jian Hua Ma, Chengliang Jiang, Howard Kaplan
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Patent number: 8048268Abstract: Method for controlling the deposition of organic contaminants from the pulp and papermaking systems using water soluble aminoplast ether copolymers is described herein. The aminoplast ether copolymer can be used alone or in combination with one or more additives. The pulps to be treated include mechanical, chemical, semi-chemical pulps; sulfide pulp; recycled old newspapers; mixed office wastes; corrugated boxes; and their combinations. The use of water soluble aminoplast ether copolymers to control or prevent pitch and stickies deposition improves down stream performance of papermaking equipment increasing mill efficiency and improving paper quality.Type: GrantFiled: October 27, 2009Date of Patent: November 1, 2011Assignee: Enzymatic Deinking Technologies, LLCInventors: Chengliang Jiang, Xiang H. Wang, Jianhua Ma, James G. Tausche
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Patent number: 8048262Abstract: Methods are provided for determining the surface fatty acid content in a wood pulp or whitewater sample. The methods comprise reacting free fatty acids which are present on the surface of the wood pulp fibers in the sample or in the whitewater with one or more reagents to form a measurable species, and determining the fatty acid content from the quantitative measurement of the measurable species. The method is useful as a quick, portable, accurate and low cost assay for assessing the fatty acid content present at various sample points in pulp and paper mills. The method for determining the free fatty acid content can be conducted in a batch process (e.g., where samples are collected periodically and the test is conducted offline). Alternatively, the method for determining the free fatty acid content can be conducted in a continuous or semi-continuous process (e.g., online sampling/analysis).Type: GrantFiled: June 11, 2008Date of Patent: November 1, 2011Assignee: Enzymatic Deinking Technologies, LLCInventors: Chengliang Jiang, Xiang H. Wang, Jianhua Ma, Robin M. Yezzi
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Publication number: 20110094695Abstract: Method for controlling the deposition of organic contaminants from the pulp and papermaking systems using water soluble aminoplast ether copolymers is described herein. The aminoplast ether copolymer can be used alone or in combination with one or more additives. The pulps to be treated include mechanical, chemical, semi-chemical pulps; sulfide pulp; recycled old newspapers; mixed office wastes; corrugated boxes; and their combinations. The use of water soluble aminoplast ether copolymers to control or prevent pitch and stickies deposition improves down stream performance of papermaking equipment increasing mill efficiency and improving paper quality.Type: ApplicationFiled: October 27, 2009Publication date: April 28, 2011Inventors: Chengliang Jiang, Xiang H. Wang, Jianhua Ma, James G. Tausche
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Publication number: 20100269989Abstract: Formulations for pitch control, and methods of making and using thereof, are described herein. The formulations contains one or more 1,3-selective lipases. 1,3-selective lipases catalyze the hydrolysis of the terminal ester groups in triglycerides leaving the internal ester group intact. The enzyme formulations can contain one or more additives, such as dispersants, metal ions, absorbents, adsorbents, cationic polymers, and combinations thereof. The enzyme formulation is typically applied as a solution to the pulp stock. The enzyme formulations can be applied at any of one or more various points during the pulping and paper manufacturing processes. The use of selective lipase(s) decreases the total concentration of fatty acids in the system, and catalyzes the formation of monoglycerides, which are more effective at dispersing fatty acids than glycerol, the product of non-selective lipases, thereby improving pulp and paper machine runnability and pulp and paper quality.Type: ApplicationFiled: April 28, 2009Publication date: October 28, 2010Inventors: Xiang H. Wang, Jianhua Ma, Chengliang Jiang, Bernard C. Gray
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Publication number: 20100170646Abstract: Wood pulp is treated with an esterase formulation in combination with a metal ion or cationic polymer to increase the stability or activity or both of esterase enzymes at high temperature, or at extreme pH ranges of acidic and alkaline conditions. The treatment by esterase together with metals ion or cationic polymer can be used to treat pitch containing pulp at high temperatures prior to, during or after refining of wood chip/pulp, in order to enhance the reduction of pitch problems and facilitate in the manufacture of paper.Type: ApplicationFiled: January 6, 2009Publication date: July 8, 2010Inventors: Xiang H. Wang, Jian Hua Ma, Chengliang Jiang, Howard Kaplan
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Publication number: 20080236770Abstract: Methods are provided for determining the surface fatty acid content in a wood pulp or whitewater sample. The methods comprise reacting free fatty acids which are present on the surface of the wood pulp fibers in the sample or in the whitewater with one or more reagents to form a measurable species, and determining the fatty acid content from the quantitative measurement of the measurable species. The method is useful as a quick, portable, accurate and low cost assay for assessing the fatty acid content present at various sample points in pulp and paper mills. The method for determining the free fatty acid content can be conducted in a batch process (e.g., where samples are collected periodically and the test is conducted offline). Alternatively, the method for determining the free fatty acid content can be conducted in a continuous or semi-continuous process (e.g., online sampling/analysis).Type: ApplicationFiled: June 11, 2008Publication date: October 2, 2008Inventors: Chengliang Jiang, Xiang H. Wang, Jianhua Ma, Robin M. Yezzi
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Publication number: 20080078519Abstract: Methods are provided for determining the surface fatty acid content in a wood pulp or whitewater sample. The methods comprise reacting free fatty acids which are present on the surface of the wood pulp fibers in the sample or in the whitewater with one or more reagents to form a measurable species, and determining the fatty acid content from the quantitative measurement of the measurable species. The method is useful as a quick, portable, accurate and low cost assay for assessing the fatty acid content present at various sample points in pulp and paper mills. The method for determining the free fatty acid content can be conducted in a batch process (e.g. where samples are collected periodically and the test is conducted offline). Alternatively, the method for determining the free fatty acid content can be conducted in a continuous or semi-continuous process (e.g., online sampling/analysis).Type: ApplicationFiled: September 21, 2006Publication date: April 3, 2008Inventors: Chengliang Jiang, Xiang H. Wang, Jianhua Ma, Robin M. Yezzi
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Publication number: 20080070971Abstract: Formulations and methods for preventing, inhibiting or controlling metabolic disorder, age-related disease and acute inflammations have been developed. The compositions comprise of bilirubins, bilirubin derivatives, their tetrapyrrolic analogues, tripyrroles, and dipyrroles. The compositions can be administered as a dosage form for oral ingestion, injection, suppository, or topical application. The effective amount of the compound is typically from 0.001-100 mg/kg body weight, preferably in the range from 0.01-50 mg/kg body weight, and most preferably from 0.05-10 mg/kg body weight. Examples demonstrate the efficacy of the compounds in both in vitro and in vivo tests.Type: ApplicationFiled: March 6, 2007Publication date: March 20, 2008Inventor: Xiang H. Wang
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Patent number: 7067244Abstract: Enzymatic methods are provided for determining the surface triglycerides content in a sample of wood pulp. The methods preferably comprise reacting triglycerides which are present on the surface of the wood pulp fibers in the sample in the presence of a lipase to form glycerol and fatty acids, and then determining the difference between the amount of free glycerol present in the sample and the amount of glycerol formed from said triglycerides. The method is useful as a quick, portable, accurate, and low cost assay for assessing the amount of triglycerides present at various sample points in pulp and paper mills, which advantageously serves as a diagnostic tool for use in controlling the undesirable deposition of pitch during the papermaking process.Type: GrantFiled: April 19, 2002Date of Patent: June 27, 2006Inventors: Chengliang Jiang, Xiang H. Wang, Robin M. Yezzi, James G. Tausche
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Publication number: 20030046984Abstract: Enzymatic methods are provided for determining the surface triglycerides content in a sample of wood pulp. The methods preferably comprise reacting triglycerides which are present on the surface of the wood pulp fibers in the sample in the presence of a lipase to form glycerol and fatty acids, and then determining the difference between the amount of free glycerol present in the sample and the amount of glycerol formed from said triglycerides. The method is useful as a quick, portable, accurate, and low cost assay for assessing the amount of triglycerides present at various sample points in pulp and paper mills, which advantageously serves as a diagnostic tool for use in controlling the undesirable deposition of pitch during the papermaking process.Type: ApplicationFiled: April 19, 2002Publication date: March 13, 2003Inventors: Chengliang Jiang, Xiang H. Wang, Robin M. Yezzi, James G. Tausche