Patents by Inventor Palani Raj Ramaswami Wallajapet
Palani Raj Ramaswami Wallajapet 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: 20040073181Abstract: Disclosed is an absorbent structure comprising an acidic or basic water-swellable, water-insoluble polymer, a basic or acidic second material, and, optionally, a buffering agent, wherein the absorbent structure exhibits desirable absorbent properties. Specifically, the present invention relates to an absorbent structure having the ability to absorb a large quantity of liquid while maintaining a substantially desired and balanced pH profile on or along the upper surface of the absorbent structure. The absorbent structure is useful in disposable absorbent products, such as those disposable absorbent products that are used to absorb body liquids.Type: ApplicationFiled: July 25, 2003Publication date: April 15, 2004Inventors: Palani Raj Ramaswami Wallajapet, Alice Y. Romans-Hess, Edwin T. Ta, Jian Qin
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Patent number: 6706945Abstract: The present invention provides an absorbent article (10) having a longitudinal direction (26), and a lateral, cross direction (24). The article includes a liquid permeable top sheet layer (28), a substantially liquid impermeable backsheet layer (30), and an absorbent structure (32) having a primary retention portion (48) sandwiched between the top sheet and backsheet layers. The retention portion (48) includes a wet-formed mixture of fibers and superabsorbent material. The retention portion has a selected edge-wise compression value, such as an edge-wise compression value of not more than a maximum of about 9 g/gsm, and a modified circular bend value, such as a modified circular bend value of at least minimum of about 0.3 g/gsm. In particular aspects, the retention portion (48) can include cellulosic fibers.Type: GrantFiled: November 10, 2000Date of Patent: March 16, 2004Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Shannon Kathleen Melius, David Arthur Fell, Violet May Grube, Andrew Edsel Huntoon, Toan Thanh LeMinh, Sridhar Ranganathan, William Grover Reeves, Lawrence Howell Sawyer, Dave Allen Soerens, Heather Anne Sorebo, Michael William Veith, Palani Raj Ramaswami Wallajapet, David Louis Zenker
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Publication number: 20040043214Abstract: A method of forming 3-dimensional fibers is disclosed along with a web formed from such fibers. The method includes the steps of co-extruding a first component and a second component. The first component has a recovery percentage R1 and the second component has a recovery percentage R2, wherein R1 is higher than R2. The first and second components are directed through a spin pack to form a plurality of continuous molten fibers. The molten fibers are then routed through a quenching chamber to form a plurality of continuous cooled fibers. The cooled fibers are then routed through a draw unit to form a plurality of continuous, solid linear fibers. The solid fibers are then accumulated and stretched by at least about 50 percent. The plurality of stretched fibers are then cut and allowed to relax such that a plurality of 3-dimensional, coiled fibers is formed.Type: ApplicationFiled: August 30, 2002Publication date: March 4, 2004Applicant: Kimberly-Clark Worldwide, Inc.Inventors: Vasily Aramovich Topolkaraev, Kevin Christopher Possell, Gregory James Wideman, Palani Raj Ramaswami Wallajapet
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Patent number: 6692825Abstract: A nonwoven web and method of preparing a novel nonwoven web of synthetic fiber are disclosed. An aqueous solution amide crosslinked synthetic precursor polymer is extruded under defined conditions through a plurality of die orifices to form a plurality of threadlines. The threadlines are attenuated with a defined primary gaseous source to form fiber under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to increase incrementally with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate sufficient to provide fiber having the desired attenuation and mean fiber diameter without significant fiber breakage. The attenuated threadlines are dried with a defined secondary gaseous source. The resulting fibers are deposited randomly on a moving foraminous surface to form a substantially uniform web.Type: GrantFiled: March 6, 2002Date of Patent: February 17, 2004Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Jian Qin, Yong Li, Wendy Lynn Van Dyke, Anthony John Wisneski, Palani Raj Ramaswami Wallajapet, Hannong Rhim
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Patent number: 6639120Abstract: Disclosed is an absorbent structure comprising an acidic or basic water-swellable, water-insoluble polymer, a basic or acidic second material, and, optionally, a buffering agent, wherein the absorbent structure exhibits desirable absorbent properties. Specifically, the present invention relates to an absorbent structure having the ability to absorb a large quantity of liquid while maintaining a substantially desired and balanced pH profile on or along the upper surface of the absorbent structure. The absorbent structure is useful in disposable absorbent products, such as those disposable absorbent products that are used to absorb body liquids.Type: GrantFiled: November 10, 1998Date of Patent: October 28, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Palani Raj Ramaswami Wallajapet, Alice Y. Romans-Hess, Edwin T. Ta, Jian Qin
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Patent number: 6620503Abstract: A nonwoven web and method of preparing a novel nonwoven web of synthetic fiber are disclosed. An aqueous solution amide crosslinked synthetic precursor polymer is extruded under defined conditions through a plurality of die orifices to form a plurality of threadlines. The threadlines are attenuated with a defined primary gaseous source to form fiber under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to increase incrementally with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate sufficient to provide fiber having the desired attenuation and mean fiber diameter without significant fiber breakage. The attenuated threadlines are dried with a defined secondary gaseous source. The resulting fibers are deposited randomly on a moving foraminous surface to form a substantially uniform web.Type: GrantFiled: March 1, 2002Date of Patent: September 16, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Jian Qin, Yong Li, Wendy Lynn Van Dyke, Anthony John Wisneski, Palani Raj Ramaswami Wallajapet, Hannong Rhim
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Publication number: 20030149415Abstract: A wet-formed composite defining latent voids and macro-cavities, the wet-formed composite having a basis weight greater than about 100 grams per square meter and a density of about 0.06 grams per cubic centimeter or more. The wet-formed composite comprises fibers and superabsorbent material, with the superabsorbent material present in an amount of about 10 dry weight percent or less, specifically about 5 dry weight percent or less, and particularly about 2 dry weight percent or less, but more than 0, based on the total dry weight of fibers and superabsorbent material present in the wet-formed composite. By virtue of the superabsorbent material having been allowed to swell and then shrink during the making of the wet-formed composite, macro-cavities are created. Densification compresses the macro-cavities. The resulting composite expands upon wetting and exhibits good absorbency properties.Type: ApplicationFiled: February 21, 2003Publication date: August 7, 2003Inventors: Palani Raj Ramaswami Wallajapet, Ronald Lee Edens, Cheryl Ann Mocadlo, Sheng-Hsin Hu, Dmitry Yavich, David Michael Kale
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Publication number: 20030149411Abstract: An absorbent article includes a vapor permeable backsheet, a liquid permeable topsheet positioned in facing relation with the backsheet; and an absorbent body located between the backsheet and the topsheet. The absorbent body may include multiple zones of high air permeability or may include materials which provide improved air exchange after being wetted. The absorbent article may also include a ventilation layer between the absorbent body and the backsheet and a surge management layer between the absorbent body and the topsheet. The article exhibits improved air exchange within the article during use. As a result, the article exhibits substantially reduced levels of hydration of the wearer's skin when in use which renders the skin less susceptible to the viability of microorganisms.Type: ApplicationFiled: February 28, 2003Publication date: August 7, 2003Inventors: Charles Paul Keuhn, Ronald Lee Edens, Peter Robert Elliker, Michael John Faulks, Sheng-Hsin Hu, Debra Jean McDowall, Shannon Kathleen Melius, Cheryl Ann Mocadlo, Cynthia Marie Phillips, Cathleen Mae Uttecht, Palani Raj Ramaswami Wallajapet, Dmitry Yavich, David Louis Zenker, Frank Jerrel Akin, Margaret Gwyn Latimer, Pamela Jean Mayberry, Susan Carol Paul, Audra Stefanik Wright
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Publication number: 20030129392Abstract: A fiber is provided wherein the fiber contains an energy receptive additive. The fiber provides rapid heating when subjected to dielectric energy such as radio frequency or microwave radiation. The energy receptive additive has a dielectric loss of between about 0.5 and 15, preferably between 1 and 15 and most preferably between 5 and 15. The fibers may be crimped, extensible or elastic.Type: ApplicationFiled: December 20, 2001Publication date: July 10, 2003Inventors: Francis Paul Abuto, Jason Sybren Fairbanks, Alan Francis Schleinz, Roland Columbus Smith, Dave Allen Soerens, Vasily Aramovich Topolkaraev, Palani Raj Ramaswami Wallajapet, Jerome James Workman, Peiguang Zhou
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Publication number: 20030118814Abstract: A nonwoven structure is provided having a fiber with a lower melting point than conventional fibers, preferably less than 110° C., more particularly less than 90° C., more particularly less than 80° C. The fiber may also include an energy receptive additive that provides rapid heating when subjected to dielectric energy such as radio frequency or microwave radiation. When included in a structure and subjected to electromagnetic radiation, the fiber is heated by contact with materials like pulp and superabsorbent, which absorb electromagnetic radiation.Type: ApplicationFiled: December 20, 2001Publication date: June 26, 2003Inventors: Jerome James Workman, Francis Paul Abuto, Vasily Aramovich Topolkaraev, Palani Raj Ramaswami Wallajapet, Peiguang Zhou
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Publication number: 20030120231Abstract: This invention is a surge material having permanent storage properties that results in faster intake and greater saturation capacity and reduced fluid flowback. More specifically the invention is a surge material with a superabsorbent material printed on in a pattern of discrete regions. The objective of the invention is obtained by printing, or other known application process, a liquid superabsorbent precursor solution containing a crosslinkable composition onto a surge material and then curing the printed surge material to crosslink the polymers to get a surge material having discrete regions of superabsorbent material in the surge material. This invention is also useful in making an absorbent core of an absorbent article with improved strength, increased absorbency, and decreased shedding of superabsorbent material.Type: ApplicationFiled: December 21, 2001Publication date: June 26, 2003Inventors: James Hongxue Wang, Jian Qin, Jayant Chakravarty, Fu-Jya Daniel Tsai, Roland Columbus Smith, Christopher Dale Fenwick, Palani Raj Ramaswami Wallajapet, D. Keith Osteen, Erin A. Evans, Scott Stephen Englebert
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Patent number: 6572735Abstract: A wet-formed composite defining latent voids and macro-cavities, the wet-formed composite having a basis weight greater than about 100 grams per square meter and a density of about 0.06 grams per cubic centimeter or more. The wet-formed composite comprises fibers and superabsorbent material, with the superabsorbent material present in an amount of about 10 dry weight percent or less, specifically about 5 dry weight percent or less, and particularly about 2 dry weight percent or less, but more than 0, based on the total dry weight of fibers and superabsorbent material present in the wet-formed composite. By virtue of the superabsorbent material having been allowed to swell and then shrink during the making of the wet-formed composite, macro-cavities are created. Densification compresses the macro-cavities. The resulting composite expands upon wetting and exhibits good absorbency properties.Type: GrantFiled: August 22, 2000Date of Patent: June 3, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Palani Raj Ramaswami Wallajapet, Ronald Lee Edens, Cheryl Ann Mocadlo, Sheng-Hsin Hu, Dmitry Yavich, David Michael Kale
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Patent number: 6558363Abstract: An absorbent article includes a vapor permeable backsheet, a liquid permeable topsheet positioned in facing relation with the backsheet; and an absorbent body located between the backsheet and the topsheet. The absorbent body may include multiple zones of high air permeability or may include materials which provide improved air exchange after being wetted. The absorbent article may also include a ventilation layer between the absorbent body and the backsheet and a surge management layer between the absorbent body and the topsheet. The article exhibits improved air exchange within the article during use. As a result, the article exhibits substantially reduced levels of hydration of the wearer's skin when in use which renders the skin less susceptible to the viability of microorganisms.Type: GrantFiled: January 26, 2001Date of Patent: May 6, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Charles Paul Keuhn, Jr., Ronald Lee Edens, Peter Robert Elliker, Michael John Faulks, Sheng-Hsin Hu, Debra Jean McDowall, Shannon Kathleen Melius, Cheryl Ann Mocadlo, Cynthia Marie Phillips, Cathleen Mae Uttecht, Palani Raj Ramaswami Wallajapet, Dmitry Yavich, David Louis Zenker, Frank Jerrel Akin, Margaret Gwyn Latimer, Pamela Jean Mayberry, Susan Carol Paul, Audra Stefanik Wright
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Publication number: 20030018313Abstract: A composite absorbent structure and method are disclosed including providing a first wicking layer having preferred liquid transport properties in a preferred contact with a second absorbent retention layer. The composite absorbent structure of the present invention provides preferred liquid transport and liquid retention properties. The composite absorbent structure has a first wicking layer in a preferred contact with the second retention layer by a novel intimate contact means effective to achieve a Contact Intimacy Ratio providing the preferred liquid transport and liquid retention functions when the first wicking layer and the second absorbent retention layer are combined together in accordance with the present invention.Type: ApplicationFiled: December 7, 2001Publication date: January 23, 2003Inventors: Richard Warren Tanzer, Kristin Ann Goerg-Wood, Donald Francis Guay, Michael Franklin Kalmon, Bernhardt Edward Kressner, Yong Li, Jian Qin, Krzysztof Andrzej Szymonski, Palani Raj Ramaswami Wallajapet, Jacek K. Dutkiewicz
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Publication number: 20020193553Abstract: A nonwoven web and method of preparing a novel nonwoven web of synthetic fiber are disclosed. An aqueous solution amide crosslinked synthetic precursor polymer is extruded under defined conditions through a plurality of die orifices to form a plurality of threadlines. The threadlines are attenuated with a defined primary gaseous source to form fiber under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to increase incrementally with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate sufficient to provide fiber having the desired attenuation and mean fiber diameter without significant fiber breakage. The attenuated threadlines are dried with a defined secondary gaseous source. The resulting fibers are deposited randomly on a moving foraminous surface to form a substantially uniform web.Type: ApplicationFiled: March 1, 2002Publication date: December 19, 2002Inventors: Jian Qin, Yong Li, Wendy Lynn Van Dyke, Anthony John Wisneski, Palani Raj Ramaswami Wallajapet, Hannong Rhim
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Publication number: 20020164914Abstract: A nonwoven web and method of preparing a novel nonwoven web of synthetic fiber are disclosed. An aqueous solution amide crosslinked synthetic precursor polymer is extruded under defined conditions through a plurality of die orifices to form a plurality of threadlines. The threadlines are attenuated with a defined primary gaseous source to form fiber under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to increase incrementally with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate sufficient to provide fiber having the desired attenuation and mean fiber diameter without significant fiber breakage. The attenuated threadlines are dried with a defined secondary gaseous source. The resulting fibers are deposited randomly on a moving foraminous surface to form a substantially uniform web.Type: ApplicationFiled: March 6, 2002Publication date: November 7, 2002Inventors: Jian Qin, Yong Li, Wendy Lynn Van Dyke, Anthony John Wisneski, Palani Raj Ramaswami Wallajapet, Hannong Rhim
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Patent number: 6469130Abstract: A nonwoven web and method of preparing a novel nonwoven web of synthetic fiber are disclosed. An aqueous solution amide crosslinked synthetic precursor polymer is extruded under defined conditions through a plurality of die orifices to form a plurality of threadlines. The threadlines are attenuated with a defined primary gaseous source to form fiber under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to increase incrementally with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate sufficient to provide fiber having,the desired attenuation and mean fiber diameter without significant fiber breakage. The attenuated threadlines are dried with a defined secondary gaseous source. The resulting fibers are deposited randomly on a moving foraminous surface to form a substantially uniform web.Type: GrantFiled: July 26, 2000Date of Patent: October 22, 2002Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Jian Qin, Yong Li, Wendy Lynn Van Dyke, Anthony John Wisneski, Palani Raj Ramaswami Wallajapet, Hannong Rhim
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Publication number: 20020149131Abstract: A nonwoven web and method of preparing a novel nonwoven web of synthetic fiber are disclosed. An aqueous solution amide crosslinked synthetic precursor polymer is extruded under defined conditions through a plurality of die orifices to form a plurality of threadlines. The threadlines are attenuated with a defined primary gaseous source to form fiber under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to increase incrementally with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate sufficient to provide fiber having the desired attenuation and mean fiber diameter without significant fiber breakage. The attenuated threadlines are dried with a defined secondary gaseous source. The resulting fibers are deposited randomly on a moving foraminous surface to form a substantially uniform web.Type: ApplicationFiled: March 4, 2002Publication date: October 17, 2002Inventors: Jian Oin, Yong Li, Wendy Lynn Van Dyke, Anthony John Wisneski, Palani Raj Ramaswami Wallajapet, Hannong Rhim
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Patent number: 6329565Abstract: A composite absorbent structure and method are disclosed including providing a first wicking layer having preferred liquid transport properties in a preferred contact with a second absorbent retention layer. The composite absorbent structure of the present invention provides preferred liquid transport and liquid retention properties. The composite absorbent structure has a first wicking layer in a preferred contact with the second retention layer by a novel intimate contact means effective to achieve a Contact Intimacy Ratio providing the preferred liquid transport and liquid retention functions when the first wicking layer and the second absorbent retention layer are combined together in accordance with the present invention.Type: GrantFiled: December 16, 1999Date of Patent: December 11, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Jacek K. Dutkiewicz, Kristin Ann Goerg-Wood, Donald Francis Guay, Michael Franklin Kalmon, Bernhardt Edward Kressner, Yong Li, Jian Oin, Krzysztof Andrzej Szymonski, Richard Warren Tanzer, Palani Raj Ramaswami Wallajapet
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Patent number: 6323388Abstract: The present invention provides an absorbent article ( 10) having a longitudinal direction ( 26), and a lateral, cross direction ( 24). The article includes a liquid permeable top sheet layer ( 28), a substantially liquid impermeable backsheet layer ( 30), and an absorbent structure ( 32) having a primary retention portion ( 48) sandwiched between the top sheet and backsheet layers. The retention portion ( 48) includes a wet-formed mixture of fibers and superabsorbent material. The retention portion has a selected edge-wise compression value, such as an edge-wise compression value of not more than a maximum of about 9 g/gsm, and a modified circular bend value, such as a modified circular bend value of at least minimum of about 0.3 g/gsm. In particular aspects, the retention portion ( 48) can include cellulosic fibers.Type: GrantFiled: June 16, 1999Date of Patent: November 27, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Shannon Kathleen Melius, David Arthur Fell, Violet May Grube, Andrew Edsel Huntoon, Toan Thanh LeMinh, Sridhar Ranganathan, William Grover Reeves, Lawrence Howell Sawyer, Dave Allen Soerens, Heather Anne Sorebo, Michael William Veith, Palani Raj Ramaswami Wallajapet, David Louis Zenker