Patents by Inventor Venkatkrishna Raghavendran
Venkatkrishna Raghavendran 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: 20160311262Abstract: A tape element having at least a first layer containing a first thermoplastic polymer, at least one crack propagation channel in a surface of the tape, and at least one reciprocal channel in the opposite surface of the tape, where the channels in the two surfaces are in registration. The crack propagation channel has an aspect ratio of width to depth of between about 1:5 and 10:1, has a depth at least 10% of the thickness of the tape in the segments, and extend along at least a portion of the length of the tape. Rubber articles containing the tape element are also disclosed.Type: ApplicationFiled: February 9, 2016Publication date: October 27, 2016Inventors: Padmakumar Puthillath, Sujith Nair, Charles W. Prestridge, Johann Peschek, Venkatkrishna Raghavendran
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Publication number: 20160311261Abstract: A tape element having at least a first layer containing a first thermoplastic polymer, at least one crack propagation channel in a surface of the tape and at least one ripstop ridge in a surface of the tape. The crack propagation channel has an aspect ratio of width to depth of between about 1:5 and 10:1, has a depth at least 10% of the thickness of the tape in the segments, and extend along at least a portion of the length of the tape. The ripstop ridge has an aspect ratio of width to height of between about 1:5 and 10:1, has a height at least 10% of the thickness of the tape in the segments, and extends along at least a portion of the length of the tape. Rubber articles containing the tape element are also disclosed.Type: ApplicationFiled: February 9, 2016Publication date: October 27, 2016Inventors: Padmakumar Puthillath, Sujith Nair, Charles W. Prestridge, Johann Peschek, Venkatkrishna Raghavendran
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Publication number: 20160311263Abstract: A tape element having at least a first layer containing a first thermoplastic polymer, at least one ripstop ridge in a surface of the tape, and at least one reciprocal elongated hill in the opposite surface of the tape, where the ridges and hills in the two surfaces are in registration. The ripstop ridges have an aspect ratio of width to height of between about 1:5 and 10:1, has a height at least 10% of the thickness of the tape in the segments, and extend along at least a portion of the length of the tape. Rubber articles containing the tape element are also disclosed.Type: ApplicationFiled: February 9, 2016Publication date: October 27, 2016Inventors: Padmakumar Puthillath, Sujith Nair, Charles W. Prestridge, Johann Peschek, Venkatkrishna Raghavendran
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Publication number: 20160311147Abstract: A tape element having at least a first layer containing a first thermoplastic polymer, at least one crack propagation channel in a surface of the tape, and at least one reciprocal channel in the opposite surface of the tape, where the channels in the two surfaces are in registration. The crack propagation channel has an aspect ratio of width to depth of between about 1:5 and 10:1, has a depth at least 10% of the thickness of the tape in the segments, and extend along at least a portion of the length of the tape. Rubber articles containing the tape element are also disclosed and a die to make the tape elements.Type: ApplicationFiled: February 9, 2016Publication date: October 27, 2016Inventors: Padmakumar Puthillath, Sujith Nair, Charles W. Prestridge, Johann Peschek, Venkatkrishna Raghavendran
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Publication number: 20160037949Abstract: A two part floor covering useful for entranceway is provided having a mat overlaying a base. A fastening system incorporating a mushroom-type fastener is provided, whereby the mat can be laid on the base and positioned as desired, without the fastening system engaging. When the mat is aligned with the base, downward pressure on the mat engages the fastening system and restricts the mat from slipping laterally or lifting vertically. Alignment and deployment of the textile component with the base component in an efficient manner is also described herein.Type: ApplicationFiled: August 5, 2015Publication date: February 11, 2016Applicant: MILLIKEN & COMPANYInventors: Ty G. Dawson, Franklin S. Love, Brandon T. Roberts, Christopher A. DeSoiza, Padmakumar Puthillath, Venkatkrishna Raghavendran, Dale S. Kitchen
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Publication number: 20140205800Abstract: A fiber reinforced polymer strengthening system having a concrete structural member having at least one outer facing surface. At least one pultruded element is located on the outer facing surface of the concrete structural member, the pultruded element containing a matrix material having a Tg of at least about 110° C. and a plurality of fibers having a tensile strength of at least about 300 MPa and an operating temperature of at least the Tg of the matrix material. Also located on the outer surface of the concrete member and at least partially covering the at least one pultruded element is an inorganic binder comprising an inorganic material having an operating temperature of at least about Tg of the matrix material of the pultruded element.Type: ApplicationFiled: January 14, 2014Publication date: July 24, 2014Applicant: MILLIKEN & COMPANYInventors: Venkatkrishna Raghavendran, Bernhard Zeiler, Qi Liao, Jeffrey Strahan, Philip T. Wilson, Gregg J. Blaszak, Dale S. Kitchen, Patrick A. Petri
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Publication number: 20140099456Abstract: A fiber reinforced polymer strengthening system containing a concrete or masonry structural member having at least one outer facing surface with at least one groove. The at least one groove contains at least one reinforcing element, where the reinforcing element contains a matrix material having a transition temperature of at least about 120° C. and a plurality of fibers having a tensile strength of at least about 1000 MPa. The groove also contains a binder comprising an inorganic material and is incombustible.Type: ApplicationFiled: September 25, 2013Publication date: April 10, 2014Inventors: Venkatkrishna Raghavendran, Bernhard Zeiler, Qi Liao, Jeffrey Strahan, Dale S. Kitchen, Patrick A. Petri, Philip T. Wilson, Gregg J. Blaszak
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Patent number: 8309478Abstract: A consolidated fibrous structure including a multiplicity of fibrous layers. Each fibrous layer comprises tape fibers, wherein the tape fibers contain a polypropylene core and a skin layer. At least a portion of the skin layers of the fibers in each fibrous layer are fused to at least a portion of other skin layers of fibers within the same fibrous layer and at least a portion of the skin layers of the fibers of each fibrous layer are fused with at least a portion of the skin layers of the fibers in an adjacent fibrous layer.Type: GrantFiled: November 30, 2011Date of Patent: November 13, 2012Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Patent number: 8211268Abstract: A process for simultaneously consolidating to form a fiber reinforced thermoplastic and thermoset structural element that contain, in order; a fiber reinforced thermoplastic member, a tie layer, and a fiber reinforced thermoset member. The fiber reinforced thermoplastic member, contains multiple layers of fibers and a thermoplastic matrix at least partially surrounding the fibers. The fiber reinforced thermoset member contains multiple layers of fibers and a thermoset matrix at least partially surrounding the fibers. The tie layer contains a first polymer and a second polymer.Type: GrantFiled: March 16, 2010Date of Patent: July 3, 2012Assignee: Milliken & CompanyInventors: Venkatkrishna Raghavendran, Ryan W. Johnson, Pradip Bahukudumbi, Kirkland W. Vogt
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Patent number: 8147957Abstract: A consolidated fibrous structure including a multiplicity of fibrous layers. The fibers of each fibrous layer contain a core, a first layer and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is disposed on at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is disposed on at least a portion of the first layer and contains a second polymer.Type: GrantFiled: January 27, 2009Date of Patent: April 3, 2012Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Publication number: 20120071054Abstract: A consolidated fibrous structure including a multiplicity of fibrous layers. Each fibrous layer comprises tape fibers, wherein the tape fibers contain a polypropylene core and a skin layer. At least a portion of the skin layers of the fibers in each fibrous layer are fused to at least a portion of other skin layers of fibers within the same fibrous layer and at least a portion of the skin layers of the fibers of each fibrous layer are fused with at least a portion of the skin layers of the fibers in an adjacent fibrous layer.Type: ApplicationFiled: November 30, 2011Publication date: March 22, 2012Inventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Patent number: 8137957Abstract: An odiferous organic compounds cover having an inner surface and an outer surface. The cover contains a thermoplastic non-woven layer containing thermoplastic fibers having a contact angle with water greater than about 70°. The cover contains a UV barrier layer contains containing a UV blocking polymer, having a thickness of between one to three times the diameter of the thermoplastic fibers of the non-woven layer, and containing discontinuities forming microchannels through the layer thickness. The cover also contains an odor mitigation layer containing a UV translucent polymer which transmits at least about 60% of UV(C) energy and anatase titanium dioxide. The odor mitigation layer comprises discontinuities forming microchannels through the layer thickness forms the outer surface of the cover.Type: GrantFiled: October 22, 2008Date of Patent: March 20, 2012Assignee: Milliken & CompanyInventors: David E. Wenstrup, Venkatkrishna Raghavendran
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Patent number: 8133537Abstract: A method for forming multi-layered fiber including a core, a first layer, and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is applied to at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is applied to at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core.Type: GrantFiled: May 3, 2011Date of Patent: March 13, 2012Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Patent number: 8119549Abstract: A consolidated fibrous structure including a multiplicity of fibrous layers. The fibers of each fibrous layer contain a core and a skin layer. The core has an exterior surface portion containing polypropylene. The skin layer is disposed on at least a portion of the core and contains a first polymer and a second polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C.Type: GrantFiled: January 27, 2009Date of Patent: February 21, 2012Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Patent number: 8114507Abstract: A multi-layered fiber containing a core and a skin layer. The core has an exterior surface portion containing polypropylene. The skin layer is disposed on at least a portion of the core and contains a first polymer and a second polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C. Methods of forming the multi-layered fiber are also disclosed.Type: GrantFiled: January 27, 2009Date of Patent: February 14, 2012Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Patent number: 8029633Abstract: A method of consolidating thermoplastic fibrous layers by providing a plurality of fibers having a core with an exterior surface portion comprising polypropylene and a first layer disposed on at least a portion of the core containing at least 70% alpha-olefin units which is formed into a first fibrous layer. A second fibrous layer is applied to the first fibrous layer which second layer contains a second polymer being a co-polymer having at least 50% alpha-olefin units which is characterized by a number-average molecular weight of about 7,000 to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C. and a melting temperature lower than the melting temperature of the exterior surface of the core. Heat and optionally pressure are applied to the assembly to consolidate the layers.Type: GrantFiled: January 27, 2009Date of Patent: October 4, 2011Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran, Howell B. Eleazer
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Publication number: 20110206849Abstract: A method for forming multi-layered fiber including a core, a first layer, and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is applied to at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is applied to at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core.Type: ApplicationFiled: May 3, 2011Publication date: August 25, 2011Inventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Patent number: 7960024Abstract: A multi-layered fiber including a core, a first layer, and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is disposed on at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is disposed on at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C.Type: GrantFiled: January 27, 2009Date of Patent: June 14, 2011Assignee: Milliken & CompanyInventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Publication number: 20100189963Abstract: A multi-layered fiber containing a core and a skin layer. The core has an exterior surface portion containing polypropylene. The skin layer is disposed on at least a portion of the core and contains a first polymer and a second polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C. Methods of forming the multi-layered fiber are also disclosed.Type: ApplicationFiled: January 27, 2009Publication date: July 29, 2010Inventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran
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Publication number: 20100190005Abstract: A multi-layered fiber including a core, a first layer, and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is disposed on at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is disposed on at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C.Type: ApplicationFiled: January 27, 2009Publication date: July 29, 2010Inventors: Sujith Nair, Sasha Stankovich, Yunzhang Wang, Venkatkrishna Raghavendran