Patents by Inventor Praveen Jana
Praveen Jana 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: 20220362695Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: ApplicationFiled: August 1, 2022Publication date: November 17, 2022Applicant: Ahlstrom-Munksjö OyjInventors: Santosh CHAVAN, Praveen JANA, Anne VISKARI
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Patent number: 11400397Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: GrantFiled: March 20, 2020Date of Patent: August 2, 2022Assignee: Ahlstrom-Munksjö OyjInventors: Santosh Chavan, Praveen Jana, Anne Viskari
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Publication number: 20200215470Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: ApplicationFiled: March 20, 2020Publication date: July 9, 2020Applicant: Ahlstrom-Munksjö OyjInventors: Santosh Chavan, Praveen JANA, Anne VISKARI
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Patent number: 10603615Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: GrantFiled: April 3, 2019Date of Patent: March 31, 2020Assignee: Ahlstrom-Munksjö OyjInventors: Santosh Chavan, Praveen Jana, Anne Viskari
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Publication number: 20190224598Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: ApplicationFiled: April 3, 2019Publication date: July 25, 2019Applicant: Ahlstrom-Munksjõ OyjInventors: Santosh CHAVAN, Praveen Jana, Anne Viskari
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Patent number: 10293288Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: GrantFiled: June 27, 2014Date of Patent: May 21, 2019Assignee: Ahlstrom-Munksjö OyjInventors: Santosh Chavan, Praveen Jana, Anne Viskari
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Publication number: 20170284092Abstract: A horizontal room partitioning device for dividing a room horizontally includes a plurality of sectioning modules. Each sectioning module comprises a housing, configured to couple to a first wall, that has an open front. A panel is coupled at a first end to a back wall of the housing. The panel is extendable from and retractable into the housing through the open front. A first fastener is coupled to a second end of the panel. A second fastener that is complementary to the first fastener is configured to couple to a second wall opposite the housing. Each of a pair of guides extends between a respective opposing end of the housing and a respective opposing terminus of the second fastener. The sectioning modules are configured for planer installation within a room, such that an upper part of the room is reversibly separable from a lower part of the room.Type: ApplicationFiled: March 31, 2016Publication date: October 5, 2017Inventor: Praveen Jana
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Publication number: 20160279548Abstract: The present invention relates to a filter medium comprising a substrate and a fine fiber layer on top of the substrate, wherein the substrate comprises a first layer comprising first fibers having a first average diameter and a first maximum fiber length; a second layer comprising second fibers having a second average diameter and a second maximum fiber length; and a third layer comprising third fibers having a third average diameter and a third maximum fiber length; wherein the boundary area between the first and the second layer forms a first blended area comprising first and second fibers; and the boundary area between the second and the third layer forms a second blended area comprising second and third fibers; and wherein the first and the third average diameters are each larger than the second average diameter.Type: ApplicationFiled: June 27, 2014Publication date: September 29, 2016Inventors: Sanfosh Chavan, Praveen Jana, Anne Viskarai
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Patent number: 6662842Abstract: Filter cartridges may have a core element formed of a non-filtering, self-supporting non-woven mass of indefinite length continuous synthetic polymeric core fibers, and at least one annular filtration zone layer formed of a mass of non-woven indefinite length continuous synthetic polymeric filtration fibers. The non-woven core element is most preferably formed in situ during filter cartridge manufacturing by melt-blowing synthetic polymeric core fiber streams toward a forming mandrel. The non-woven core element is completely solidified prior to the filtration zone fibers being melt-blown thereon so that the core and filtration fibers are predominantly mechanically interlocked with one another, instead of being melt-bonded thereto. Filter cartridges of predetermined length may be cut from an upstream filter cartridge preform of indefinite length by subjecting the preform to forced cooling air to thereby minimize (if not eliminate entirely) significant filter cartridge shrinkage over time.Type: GrantFiled: August 30, 2001Date of Patent: December 16, 2003Assignee: Pall CorporationInventors: Brian Mozelack, Robert J. Schmitt, Steven D. Barboza, Praveen Jana, Son Ngoc Nguyen, Ronald R. Gschwandtner, Robert D. Connor, Timothy W. Yingling
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Publication number: 20020025397Abstract: Filter cartridges may have a core element formed of a non-filtering, self-supporting non-woven mass of indefinite length continuous synthetic polymeric core fibers, and at least one annular filtration zone layer formed of a mass of non-woven indefinite length continuous synthetic polymeric filtration fibers. The non-woven core element is most preferably formed in situ during filter cartridge manufacturing by melt-blowing synthetic polymeric core fiber streams toward a forming mandrel. The non-woven core element is completely solidified prior to the filtration zone fibers being melt-blown thereon so that the core and filtration fibers are predominantly mechanically interlocked with one another, instead of being melt-bonded thereto. Filter cartridges of predetermined length may be cut from an upstream filter cartridge preform of indefinite length by subjecting the preform to forced cooling air to thereby minimize (if not eliminate entirely) significant filter cartridge shrinkage over time.Type: ApplicationFiled: August 30, 2001Publication date: February 28, 2002Applicant: USF Filtration & Separations, Inc.Inventors: Brian Mozelack, Robert J. Schmitt, Steven D. Barboza, Praveen Jana, Son Ngoc Nguyen, Ronald R. Gschwandtner, Robert D. Connor, Timothy W. Yingling
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Patent number: 6342283Abstract: Filter cartridges may have a core element formed of a non-filtering, self-supporting non-woven mass of indefinite length continuous synthetic polymeric core fibers, and at least one annular filtration zone layer formed of a mass of non-woven indefinite length continuous synthetic polymeric filtration fibers. The non-woven core element is most preferably formed in situ during filter cartridge manufacturing by melt-blowing synthetic polymeric core fiber streams toward a forming mandrel. The non-woven core element is completely solidified prior to the filtration zone fibers being melt-blown thereon so that the core and filtration fibers are predominantly mechanically interlocked with one another, instead of being melt-bonded thereto. Filter cartridges of predetermined length may be cut from an upstream filter cartridge preform of indefinite length by subjecting the preform to forced cooling air to thereby minimize (if not eliminate entirely) significant filter cartridge shrinkage over time.Type: GrantFiled: July 22, 1999Date of Patent: January 29, 2002Assignee: USF Filtration & Separations, Inc.Inventors: Brian Mozelack, Robert J. Schmitt, Steven D. Barboza, Praveen Jana, Son Ngoc Nguyen, Ronald R. Gschwandtner, Robert D. Connor, Timothy W. Yingling