Patents by Inventor Srimannarayana Kakarala

Srimannarayana Kakarala 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).

  • Patent number: 9718952
    Abstract: A thermoplastic polypropylene composition comprising polypropylene, a hydrogenated block copolymer, 3 to 6 wt % high density polyethylene, a processing oil, and greater than or equal to 3 wt % of a surface modifier comprising an ultra high molecular weight polydialkyl siloxane, an ultra-high molecular weight polydialkyl siloxane in combination with silica, a polyolefin siloxane or a combination thereof, wherein weight percent is based on the total weight of the composition.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: August 1, 2017
    Assignee: INTEVA PRODUCTS, LLC
    Inventors: John F. O'Gara, Srimannarayana Kakarala
  • Publication number: 20170152378
    Abstract: A thermoplastic polypropylene composition comprising polypropylene, a hydrogenated block copolymer, 3 to 6 wt % high density polyethylene, a processing oil, and greater than or equal to 3 wt % of a surface modifier comprising an ultra high molecular weight polydialkyl siloxane, an ultra-high molecular weight polydialkyl siloxane in combination with silica, a polyolefin siloxane or a combination thereof, wherein weight percent is based on the total weight of the composition.
    Type: Application
    Filed: February 22, 2016
    Publication date: June 1, 2017
    Inventors: JOHN F. O'GARA, SRIMANNARAYANA KAKARALA
  • Patent number: 9421937
    Abstract: A panel having a deployable cover for an airbag module is provided. The panel having: an outer layer having a show surface and an inner surface opposite the show surface; a tear seam formed in the outer layer, the tear seam defined by a plurality of holes formed in the outer layer extending from the inner surface towards the show surface, wherein a residual wall thickness of the outer layer is located between each of the plurality of holes and the show surface, wherein the outer layer includes at least one filler material, that exhibits an absorbance of a wavenumber of a laser used to form the plurality of holes.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: August 23, 2016
    Assignee: INTEVA PRODUCTS, LLC
    Inventors: John F. O'Gara, Srimannarayana Kakarala, Donna Hawes
  • Patent number: 9267026
    Abstract: A thermoplastic polypropylene composition comprising polypropylene, a hydrogenated block copolymer, 3 to 6 wt % high density polyethylene, 5 to 10 wt % of a processing oil, and greater than or equal to 3 wt % of a surface modifier comprising an ultra high molecular weight polydialkyl siloxane, an ultra-high molecular weight polydialkyl siloxane in combination with silica, a polyolefin siloxane or a combination thereof, wherein weight percent is based on the total weight of the composition.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: February 23, 2016
    Assignee: INTEVA PRODUCTS, LLC
    Inventors: John F. O'Gara, Srimannarayana Kakarala
  • Publication number: 20150232656
    Abstract: A thermoplastic polypropylene composition comprising polypropylene, a hydrogenated block copolymer, 3 to 6 wt % high density polyethylene, 5 to 10 wt % of a processing oil, and greater than or equal to 3 wt % of a surface modifier comprising an ultra high molecular weight polydialkyl siloxane, an ultra-high molecular weight polydialkyl siloxane in combination with silica, a polyolefin siloxane or a combination thereof, wherein weight percent is based on the total weight of the composition.
    Type: Application
    Filed: December 22, 2014
    Publication date: August 20, 2015
    Inventors: John F. O'Gara, Srimannarayana Kakarala
  • Publication number: 20150137491
    Abstract: A panel having a deployable cover for an airbag module is provided. The panel having: an outer layer having a show surface and an inner surface opposite the show surface; a tear seam formed in the outer layer, the tear seam defined by a plurality of holes formed in the outer layer extending from the inner surface towards the show surface, wherein a residual wall thickness of the outer layer is located between each of the plurality of holes and the show surface, wherein the outer layer includes at least one filler material, that exhibits an absorbance of a wavenumber of a laser used to form the plurality of holes.
    Type: Application
    Filed: October 16, 2014
    Publication date: May 21, 2015
    Inventors: John F. O'Gara, Srimannarayana Kakarala, Donna Hawes
  • Patent number: 8967659
    Abstract: A panel having a deployable cover for an airbag module is provided. The panel having: an outer layer having a show surface and an inner surface opposite the show surface; a tear seam formed in the outer layer, the tear seam defined by a plurality of holes formed in the outer layer extending from the inner surface towards the show surface, wherein a residual wall thickness of the outer layer is located between each of the plurality of holes and the show surface, wherein the outer layer includes at least one filler material, that exhibits an absorbance of a wavenumber of a laser used to form the plurality of holes.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 3, 2015
    Assignee: Inteva Products, LLC
    Inventors: John F. O'Gara, Srimannarayana Kakarala, Donna Hawes
  • Publication number: 20140265267
    Abstract: A panel having a deployable cover for an airbag module is provided. The panel having: an outer layer having a show surface and an inner surface opposite the show surface; a tear seam formed in the outer layer, the tear seam defined by a plurality of holes formed in the outer layer extending from the inner surface towards the show surface, wherein a residual wall thickness of the outer layer is located between each of the plurality of holes and the show surface, wherein the outer layer includes at least one filler material, that exhibits an absorbance of a wavenumber of a laser used to form the plurality of holes.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventors: John F. O'Gara, Srimannarayana Kakarala, Donna Hawes
  • Patent number: 7714057
    Abstract: An automotive part containing at least one component formed from a composition comprising the following: (i) a crystalline, isotactic propylene homopolymer, (ii) an ethylene/?-olefin elastomeric impact modifier, and (iii) a reinforcing grade of filler, for example, talc. The crystalline isotactic propylene homopolymer has a flex modulus of greater than about 1930 MPa and a heat deflection temperature (HDT) of greater than about 100° C.; the ethylene/?-olefin interpolymer has a Tg of less than about ?30° C., and a tan delta measured at 0.1 radians/s at 190° C. of less than about 2; and the filler has a HDT reinforcing efficiency of at least about 2. The automotive part has an HDT of greater than about 100° C. and a flex modulus of greater than about 1930 MPa.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: May 11, 2010
    Assignees: Dow Global Technologies Inc., Inteva Products, LLC
    Inventors: Henry G. Heck, Srimannarayana Kakarala
  • Publication number: 20070276094
    Abstract: Disclosed is a thermoplastic polyolefin composition having improved adhesion to applied polymeric foams or coatings, the composition comprising (a) polypropylene, (b) a hydrogenated copolymer of a vinyl aromatic compound and an alkylene compound, comprising (i) from 1 to no more than 30% by weight of vinyl aromatic residues, based on the weight of the copolymer, and (ii) at least 55% by weight of alkylene residues that are C4 or higher, based on total alkylene content of copolymer (b) prior to hydrogenation, (c) a functionalized polyolefin, and (d) a monoamine terminated polyalkylene oxide. In one embodiment, the functionalized polyolefin (c) and monoamine terminated polyalkylene oxide (d) form an adduct that is thermodynamically miscible with the copolymer (b) at adduct:copolymer (b) ratios of from 0.1:9.9 to 9.9:0.1.
    Type: Application
    Filed: June 27, 2007
    Publication date: November 29, 2007
    Inventors: Srimannarayana Kakarala, Thomas Ellis
  • Publication number: 20070265396
    Abstract: Disclosed is a thermoplastic polyolefin composition having a reduced melt viscosity, (a) polypropylene, (b) a hydrogenated copolymer of a vinyl aromatic compound and an alkylene compound, comprising (i) from 1 to no more than 30% by weight of vinyl aromatic residues, based on the weight of the copolymer, and (ii) at least 60% by weight of alkylene residues that are C4 or higher, based on the weight of the copolymer, and a processing oil (f).
    Type: Application
    Filed: June 27, 2007
    Publication date: November 15, 2007
    Inventors: Srimannarayana Kakarala, Thomas Ellis, Ralph Bankston
  • Publication number: 20070037914
    Abstract: An automotive part containing at least one component formed from a composition comprising the following: (i) a crystalline, isotactic propylene homopolymer, (ii) an ethylene/?-olefin elastomeric impact modifier, and (iii) a reinforcing grade of filler, for example, talc. The crystalline isotactic propylene homopolymer has a flex modulus of greater than about 1930 MPa and a heat deflection temperature (HDT) of greater than about 100° C.; the ethylene/?-olefin interpolymer has a Tg of less than about ?30° C., and a tan delta measured at 0.1 radians/s at 190° C. of less than about 2; and the filler has a HDT reinforcing efficiency of at least about 2. The automotive part has an HDT of greater than about 100° C. and a flex modulus of greater than about 1930 MPa.
    Type: Application
    Filed: June 23, 2006
    Publication date: February 15, 2007
    Applicants: Dow Global Technologies Inc., Delphi Automotive Systems L.L.C.
    Inventors: Henry Heck, Srimannarayana Kakarala
  • Publication number: 20060287435
    Abstract: A thermoplastic polyolefin composition containing polypropylene or a copolymer thereof, an ethylene copolymer, and a peroxide. In one embodiment, one of the polypropylene or copolymer thereof or the ethylene copolymer is a continuous phase, while the other is a discontinuous dispersed phase therein. In another embodiment, one of the polypropylene and ethylene copolymer components has a relatively low melt flow index and the other component has a relatively high melt flow index. Optional components include a metal stearate, a primary amide, a heat and/or light stabilizer, and a coloring additive. Articles molded from these thermoplastic compositions are also provided.
    Type: Application
    Filed: June 17, 2005
    Publication date: December 21, 2006
    Applicant: Delphi Technologies Inc.
    Inventors: Xinhua He, Michael Jary, Srimannarayana Kakarala, Suresh Shah
  • Publication number: 20060100380
    Abstract: A thermoplastic polyolefin composition suitable for slush molding comprising a blend of polypropylene, styrenic elastomer, linear low density polyethylene and a hydrocarbon-based process oil. Optional components include an ethylene copolymer elastomer, polymer additives such as polymer surface modifiers, powder flow additives, stabilizers and/or color pigments. The compositions exhibit a low melt viscosity during processing and improved surface quality for the molded article. An exemplary composition includes about 20-50 wt. % polypropylene or copolymer thereof, about 20-60 wt. % of a styrenic elastomer, about 5-50 wt. % linear low density polyethylene, and about 2-25 wt. % of a hydrocarbon-based process oil. The zero shear viscosity of the composition suitable for slush molding is in the range of about 300-900 Pa·s over a processing temperature range of 180-260° C.
    Type: Application
    Filed: November 5, 2004
    Publication date: May 11, 2006
    Applicant: Delphi Technologies, Inc.
    Inventors: Srimannarayana Kakarala, Sandip Patel, Thomas Ellis
  • Patent number: 7037979
    Abstract: Thermoplastic polyolefin compositions and a process for preparing the same are provided comprising a blend of polypropylene, and styrenic elastomer. The compositions may further comprise ethylene copolymer elastomer, polymer additive, such as polymer surface modifier, powder flow additive, stabilizer and/or color pigment. The compositions are particularly applicable for use in a slush molding process where low melt viscosity is desired to form improved surface quality thermoplastic polyolefin skin. A process is disclosed for preparing thermoplastic polyolefin into a slush moldable powder by melt compounding the composition to form pellets, and further processing the pellets by cryogenic pulverization or by extruding micropellets in one step using a gear pump to increase the melt pressure.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: May 2, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: Srimannarayana Kakarala, Sandip R. Patel, Thomas S. Ellis
  • Patent number: 6828384
    Abstract: Disclosed herein is a thermoplastic olefin composition, comprising, based on the total weight of the composition: about 20 wt % to about 40 wt % polypropylene; about 20 wt % to about 70 wt % ethylene copolymer; and less than or equal to about 30 wt % linear low density polyethylene, a process of forming the thermoplastic olefin composition, a process for vacuum forming an article comprising the composition, an article of manufacture comprising the composition, and an automotive assembly comprising, based on the total weight of the assembly: about 20 to about 40 wt % polypropylene; about 20 to about 70 wt % ethylene copolymer; and less than or equal to about 30 wt % linear low density polyethylene.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: December 7, 2004
    Assignee: Delphi Technologies Inc.
    Inventors: Srimannarayana Kakarala, Jason B. Clock, Marty D. Skirha
  • Publication number: 20040044111
    Abstract: Thermoplastic polyolefin compositions and a process for preparing the same are provided comprising a blend of polypropylene, and styrenic elastomer. The compositions may further comprise ethylene copolymer elastomer, polymer additive, such as polymer surface modifier, powder flow additive, stabilizer and/or color pigment. The compositions are particularly applicable for use in a slush molding process where low melt viscosity is desired to form improved surface quality thermoplastic polyolefin skin. A process is disclosed for preparing thermoplastic polyolefin into a slush moldable powder by melt compounding the composition to form pellets, and further processing the pellets by cryogenic pulverization or by extruding micropellets in one step using a gear pump to increase the melt pressure.
    Type: Application
    Filed: September 4, 2002
    Publication date: March 4, 2004
    Inventors: Srimannarayana Kakarala, Sandip R. Patel, Thomas S. Ellis
  • Publication number: 20030197302
    Abstract: A thermoplastic olefin composition comprises, based on the total weight of the composition: about 20 wt % to about 40 wt % polypropylene; about 30 wt % to about 50 wt % ethylene copolymer; and about 20 wt % to about 30 wt % linear low density polyethylene.
    Type: Application
    Filed: April 17, 2002
    Publication date: October 23, 2003
    Inventors: Srimannarayana Kakarala, Jason B. Clock, Marty D. Skirha
  • Publication number: 20030199637
    Abstract: Disclosed herein is a thermoplastic olefin composition, comprising, based on the total weight of the composition: about 20 wt % to about 40 wt % polypropylene; about 20 wt % to about 70 wt % ethylene copolymer; and less than or equal to about 30 wt % linear low density polyethylene, a process of forming the thermoplastic olefin composition, a process for vacuum forming an article comprising the composition, an article of manufacture comprising the composition, and an automotive assembly comprising, based on the total weight of the assembly: about 20 to about 40 wt % polypropylene; about 20 to about 70 wt % ethylene copolymer; and less than or equal to about 30 wt % linear low density polyethylene.
    Type: Application
    Filed: June 18, 2002
    Publication date: October 23, 2003
    Inventors: Srimannarayana Kakarala, Jason B. Clock, Marty D. Skirha
  • Patent number: 6593002
    Abstract: A multi layer thermoplastic polymer alloy is provided. The multi layer alloy includes a skin of thermoplastic polymer alloy having non-polar segments and a tie-layer having non-polar segments and polar functional groups. The non-polar segments of the tie-layer are bondable with the non-polar segments of the thermoplastic polymer alloy skin. Similarly, the polar functional groups of the tie-layer are bondable or reactable with a surface layer.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: July 15, 2003
    Assignee: Delphi Technologies, inc.
    Inventors: Suresh D. Shah, Nicole M. Mahmood, Srimannarayana Kakarala