Patents by Inventor Chi Hang Leung
Chi Hang Leung 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: 20240150937Abstract: Provided herein are protective masks made with polymer-based materials and methods of forming the materials. Methods of forming the interlaced polymer-based materials comprise applying adhesive to a substrate, electrospinning a first polymer solution onto the substrate from a first group of spinning electrodes, electrospinning a second polymer solution onto the substrate from a second group of spinning electrodes, and applying hot air to dry the polymer-based materials electrospun from the first polymer solution and the second polymer solution to form the interlaced polymer-based materials.Type: ApplicationFiled: May 18, 2022Publication date: May 9, 2024Inventors: Siu Wah WONG, Ho Wang TONG, Chi Hang YU, Yu Hang LEUNG, Wing Man CHAN
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Publication number: 20230077706Abstract: Systems and methods for independently upgradeable docking stations are discussed herein. One or more chipsets of a docking station may provide services to a host device, and each may use a corresponding firmware. The docking station may receive chipset firmware update data for one or more of the chipsets. In a first case, this data is received from a universal serial bus (USB) storage device (which in some cases can independently update its copy of the chipset firmware update data with a cloud server). In other cases, this data is received from a cloud server using a network interface system on a chip (which may be internal to, or separately connected to, the docking station). The docking station performs this receipt and/or the corresponding firmware update with no input from any host device that may (or may not) be attached, and/or without interrupting chipset services of any such host device.Type: ApplicationFiled: September 14, 2021Publication date: March 16, 2023Inventors: Man Cheung Dan Tsang, Chi Hang Leung, Ronald DeCamp
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Patent number: 9157908Abstract: Methods for culturing cancer cells in vitro using a three-dimensional scaffold, scaffolds that include the cultured cancer cells, and methods for using the cultured cancer cells and the scaffolds that include the cultured cancer cells in anticancer therapeutic drug development.Type: GrantFiled: April 23, 2012Date of Patent: October 13, 2015Assignee: University of Washington through its Center for CommercializationInventors: Miqin Zhang, Forrest Kievit, Matthew Chi-hang Leung, Stephen Florczyk
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Patent number: 9016675Abstract: An apparatus for supporting a workpiece during processing of the workpiece is disclosed. The apparatus comprises: a chassis having a vacuum chamber that is connectable to a vacuum source; a supporting device rotatable relative to the chassis, the supporting device having a hollow compartment and a supporting surface for holding the workpiece; and at least one sealing device arranged between the chassis and the supporting device, to provide an air-tight seal between the chassis and the supporting device while allowing for rotation of the supporting device with respect to the chassis, so as to form a vacuum passage extending from the supporting surface of the supporting device through the hollow compartment of the supporting device and the vacuum chamber of the chassis to the vacuum source, to thereby hold the workpiece to the supporting surface of the supporting device during processing of the workpiece.Type: GrantFiled: July 6, 2012Date of Patent: April 28, 2015Assignee: ASM Technology Singapore Pte LtdInventors: Chi Wah Cheng, Lap Kei Chow, Chi Hang Leung
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Publication number: 20140008855Abstract: An apparatus for supporting a workpiece during processing of the workpiece is disclosed. The apparatus comprises: a chassis having a vacuum chamber that is connectable to a vacuum source; a supporting device rotatable relative to the chassis, the supporting device having a hollow compartment and a supporting surface for holding the workpiece; and at least one sealing device arranged between the chassis and the supporting device, to provide an air-tight seal between the chassis and the supporting device while allowing for rotation of the supporting device with respect to the chassis, so as to form a vacuum passage extending from the supporting surface of the supporting device through the hollow compartment of the supporting device and the vacuum chamber of the chassis to the vacuum source, to thereby hold the workpiece to the supporting surface of the supporting device during processing of the workpiece.Type: ApplicationFiled: July 6, 2012Publication date: January 9, 2014Inventors: Chi Wah CHENG, Lap Kei CHOW, Chi Hang LEUNG
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Publication number: 20120272347Abstract: Methods for culturing cancer cells in vitro using a three-dimensional scaffold, scaffolds that include the cultured cancer cells, and methods for using the cultured cancer cells and the scaffolds that include the cultured cancer cells in anticancer therapeutic drug development.Type: ApplicationFiled: April 23, 2012Publication date: October 25, 2012Applicant: University of Washington through its Center for CommercializationInventors: Miqin Zhang, Forrest Kievit, Matthew Chi-hang Leung
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Patent number: 8037996Abstract: An apparatus for transferring a plurality of electronic components includes a row of pick heads operative to pick up the electronic components simultaneously from a first location and to place them at a second location. Additionally, there is a driving mechanism operative to drive the pick heads to move relative to one another in directions which are parallel to a length of the row of pick heads whereby to adjust a pitch width of the pick heads.Type: GrantFiled: January 5, 2009Date of Patent: October 18, 2011Assignee: ASM Assembly Automation LtdInventors: Chi Wah Cheng, Wang Lung Tse, Chi Hang Leung
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Publication number: 20110076254Abstract: A method for expanding a population of stem cells using a porous scaffold, a porous scaffold populated with renewed stem cells, methods of administering stem cells using the porous scaffold and cells collected from the porous scaffold, and methods for tissue engineering and treating a condition treatable by administration of stem cells using the porous scaffold and cells collected from the porous scaffold.Type: ApplicationFiled: September 28, 2010Publication date: March 31, 2011Applicant: UNIVERSITY OF WASHINGTONInventors: Miqin Zhang, Zhensheng Li, Matthew Chi-hang Leung
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Patent number: 7849847Abstract: A singulation system for a workpiece has a carrier for mounting the workpiece during singulation and a receptacle for collecting debris formed. A driving mechanism, which is operative to move the carrier and the workpiece, is at least partially covered by a bellows. A bellows protecting cover extending over the bellows is coupled between the carrier and the receptacle and is operative to guide debris from the carrier along its longitudinal length towards the receptacle. The bellows protecting cover further comprises side walls extending along opposite sides of its longitudinal length to prevent debris from falling off its sides.Type: GrantFiled: September 11, 2007Date of Patent: December 14, 2010Assignee: ASM Assembly Automation LtdInventors: Chi Wah Cheng, Lap Kei Eric Chow, Chi Hang Leung
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Publication number: 20100172734Abstract: An apparatus for transferring a plurality of electronic components includes a row of pick heads operative to pick up the electronic components simultaneously from a first location and to place them at a second location. Additionally, there is a driving mechanism operative to drive the pick heads to move relative to one another in directions which are parallel to a length of the row of pick heads whereby to adjust a pitch width of the pick heads.Type: ApplicationFiled: January 5, 2009Publication date: July 8, 2010Inventors: Chi Wah CHENG, Wang Lung TSE, Chi Hang LEUNG
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Publication number: 20090064834Abstract: A singulation system for a workpiece has a carrier for mounting the workpiece during singulation and a receptacle for collecting debris formed. A driving mechanism, which is operative to move the carrier and the workpiece, is at least partially covered by a bellows. A bellows protecting cover extending over the bellows is coupled between the carrier and the receptacle and is operative to guide debris from the carrier along its longitudinal length towards the receptacle. The bellows protecting cover further comprises side walls extending along opposite sides of its longitudinal length to prevent debris from falling off its sides.Type: ApplicationFiled: September 11, 2007Publication date: March 12, 2009Inventors: Chi Wah CHENG, Lap Kei Eric CHOW, Chi Hang LEUNG
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Patent number: 7258703Abstract: An apparatus and method are provided for aligning a plurality of semiconductor devices placed on a carrier. Alignment guides are located adjacent to each device in use, and arranged such that they correspond to a desired alignment of each semiconductor device. For alignment, the semiconductor devices are held by a positioning device comprising a plurality of holders, each holder being configured to generate a force to hold a semiconductor device. Actuators are also provided that are operative to move the positioning device and holders to bias the semiconductor devices against the alignment guides to orientate the semiconductor devices until they are aligned with said alignment guides.Type: GrantFiled: January 7, 2005Date of Patent: August 21, 2007Assignee: ASM Assembly Automation Ltd.Inventors: Chi Wah Cheng, Hoi Shuen Joseph Tang, Tim Wai Tony Mak, Chi Hang Leung