Patents by Inventor Siqiang Zhu
Siqiang Zhu 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: 20230330585Abstract: Articles and methods involving filter media are generally provided. In certain embodiments, a filter media has a design and/or comprises one or more layers that enhances its efficiency and/or performance.Type: ApplicationFiled: April 14, 2022Publication date: October 19, 2023Applicant: Hollingsworth & Vose CompanyInventors: Amsarani Ramamoorthy, Siqiang Zhu, Shania Evangelista, Bryan Douglas Dickerson, Kevin Clark, Praveen Kumar Yegya Raman, Keith Higginson
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Publication number: 20220249997Abstract: Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.Type: ApplicationFiled: March 7, 2022Publication date: August 11, 2022Applicant: Hollingsworth & Vose CompanyInventors: Sneha Swaminathan, Howard Yu, Siqiang Zhu
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Patent number: 11266941Abstract: Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.Type: GrantFiled: July 19, 2019Date of Patent: March 8, 2022Assignee: Hollingsworth & Vose CompanyInventors: Sneha Swaminathan, Howard Yu, Siqiang Zhu
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Publication number: 20220001316Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: ApplicationFiled: July 14, 2021Publication date: January 6, 2022Applicant: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu
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Patent number: 11090590Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: GrantFiled: March 20, 2019Date of Patent: August 17, 2021Assignee: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu
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Publication number: 20200391148Abstract: Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.Type: ApplicationFiled: February 17, 2020Publication date: December 17, 2020Applicant: Hollingsworth & Vose CompanyInventors: Bruce Smith, David T. Healey, Ingrid Rückert, Siqiang Zhu
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Patent number: 10561972Abstract: Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.Type: GrantFiled: March 22, 2017Date of Patent: February 18, 2020Assignee: Hollingsworth & Vose CompanyInventors: Bruce Smith, David T. Healey, Ingrid Rückert, Siqiang Zhu
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Publication number: 20200009488Abstract: Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.Type: ApplicationFiled: July 19, 2019Publication date: January 9, 2020Applicant: Hollingsworth & Vose CompanyInventors: Sneha Swaminathan, Howard Yu, Siqiang Zhu
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Publication number: 20190314747Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: ApplicationFiled: March 20, 2019Publication date: October 17, 2019Applicant: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu
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Patent number: 10399024Abstract: Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.Type: GrantFiled: November 12, 2015Date of Patent: September 3, 2019Assignee: Hollingsworth & Vose CompanyInventors: Sneha Swaminathan, Howard Yu, Siqiang Zhu
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Patent number: 10279291Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: GrantFiled: August 31, 2015Date of Patent: May 7, 2019Assignee: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu
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Publication number: 20180001244Abstract: Filter media for filtering gas streams (e.g., air) are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency, high oil repellency, low instantaneous resistance, and/or stable service life. One or more layers of the media may have a certain value of thickness over instantaneous resistance (and/or a ratio of thickness over instantaneous resistance between two layers). The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, respirator equipment), though the media may also be used in other applications.Type: ApplicationFiled: July 1, 2016Publication date: January 4, 2018Applicant: Hollingsworth & Vose CompanyInventors: Siqiang Zhu, Mark A. Gallimore, Stephen T. Cox
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Publication number: 20170312673Abstract: Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.Type: ApplicationFiled: March 22, 2017Publication date: November 2, 2017Applicant: Hollingsworth & Vose CompanyInventors: Bruce Smith, David T. Healey, Ingrid Rückert, Siqiang Zhu
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Publication number: 20160136554Abstract: Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil.Type: ApplicationFiled: November 12, 2015Publication date: May 19, 2016Applicant: Hollingsworth & Vose CompanyInventors: Sneha Swaminathan, Howard Yu, Siqiang Zhu
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Publication number: 20160059167Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: ApplicationFiled: August 31, 2015Publication date: March 3, 2016Applicant: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu
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Patent number: 9149749Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: GrantFiled: May 15, 2014Date of Patent: October 6, 2015Assignee: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu
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Publication number: 20140331626Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.Type: ApplicationFiled: May 15, 2014Publication date: November 13, 2014Applicant: Hollingsworth & Vose CompanyInventors: Máté Nagy, Siqiang Zhu