Patents by Inventor Probir Kumar Guha

Probir Kumar Guha 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: 9843076
    Abstract: A temperature regulation and management system is provide that has an inner wall and an outer wall forming a space for accommodating a phase change material (PCM) with the space between the walls, in one or both of the walls, or a combination of such locations. The inner wall is in contact with an object that requires temperature regulation within a specified operating range, such as a vehicle battery pack. The inner wall and the outer wall are both formed from sheet molding compound (SMC), or the outer wall if formed of a filled polyurethane.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: December 12, 2017
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael Joseph Hiltunen, Swati Neogi, Jack Douglas Dunagan, Adam Craig Burley
  • Publication number: 20170247543
    Abstract: A process of formulating a curable thermoset resin formulation is provided that includes reacting a natural cellulosic filler with at least one of: a silsesquioxane, a isocyanate, a base, or an organic acid to form a reduced hydrophilicity filler. By intermixing the resulting reduced hydrophilicity filler with a thermoset cross linkable polymeric resin, a curable thermoset resin formulation is formed that has superior properties to conventional formulations in terms of density and environmental impact. The formulation properties in terms of strength of the cured article are improved relative to untreated natural fillers. The treatment is advantageous relative to plasma treatment. An article is also provided produced upon cure of the formulation.
    Type: Application
    Filed: May 16, 2017
    Publication date: August 31, 2017
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael Joseph Hiltunen
  • Patent number: 9718945
    Abstract: A molding composition formulation is provided of a thermoset cross-linkable polyol having unsaturated backbone comprising the structure defined by formula 1: (1) a reinforcing filler; and optionally, a flame retardant, a UV stabilizer or a composition comprising one of the foregoing.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: August 1, 2017
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael J. Hiltunen, Ashley B. Hartmann, Shane Michael Skop
  • Patent number: 9718932
    Abstract: A process is provided for overmolding an insert or substrate with non-oriented thermoplastic fibers present in an amount that allows them to thermally bond in the presence of non-oriented filler fibers. The thermoplastic fiber fusion retains the filler fibers within the insert upon cooling. The filler fibers are selected to modify the properties of the insert and an overmolded article formed with the insert therein. Such overmolded articles are used in applications including vehicle components such as automotive interior light bases, posts, undercar components, cross members, chassis components, and frame components; architectural components such as home door interiors, sound damping panels, and weather resistant wood replacement. Articles formed with the inventive process yield weight reductions compared to conventional insert overmoldings, along with low scrap generation, process flexibility with respect to part shape and fiber material.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: August 1, 2017
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventor: Probir Kumar Guha
  • Patent number: 9682511
    Abstract: Pressurized air is conveyed through a manifold into contact with the first member via apertures having hole diameters of from 0.8 to 2.5 mm that are spaced apart at a distance of from 10 to 30 mm along the manifold to achieve a turbulent air flow pattern with a Reynolds number of greater than 2200 at a temperature of between 150 and 315° C. and at an air pressure between 0.5 and 10 pounds per square inch (psi) over ambient pressure onto the outer surfaces of the first member and the second member for heat curing a curable adhesive between the members to achieve adhesive cure in 60 to 90 seconds and free of any bond-line read-out visible to an unaided normal human eye.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: June 20, 2017
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Brad Haskell, Hugh C. Foran
  • Patent number: 9676942
    Abstract: A process of formulating a curable thermoset resin formulation is provided that includes reacting a natural cellulosic filler with at least one of: a silsesquioxane, a isocyanate, a base, or an organic acid to form a reduced hydrophilicity filler. By intermixing the resulting reduced hydrophilicity filler with a thermoset cross linkable polymeric resin, a curable thermoset resin formulation is formed that has superior properties to conventional formulations in terms of density and environmental impact. The formulation properties in terms of strength of the cured article are improved relative to untreated natural fillers. The treatment is advantageous relative to plasma treatment. An article is also provided produced upon cure of the formulation.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: June 13, 2017
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael Joseph Hiltunen, Scott Eldor Pflughoeft, Swati Neogi
  • Publication number: 20170107366
    Abstract: A molding composition formulation is provided that includes polypropylene, glass fiber, and a cellulosic powder used as a filler. The filler may be at least one of coconut shell powder, walnut shell powder, or rice hull. The molding composition formulation may further include natural cellulosic fiber illustratively including at least one of coconut fibers, bamboo fibers, sugar cane fibers, or banana skin fibers. The molding composition may be compression moldable long fiber thermoplastic (LFTD). The molding composition formulation may be used in thermoforming. In a specific embodiment of the molding composition, the formulation proportion of the polypropylene is 50 to 60 percent of the formulation; and the polypropylene substitute is 5 to 15 percent of the formulation, and in an alternative embodiment, the formulation proportion of the polypropylene is 40 to 80 percent, the cellulosic powder is 1 to 25 percent, and the glass fiber is 1 to 50 percent.
    Type: Application
    Filed: June 15, 2015
    Publication date: April 20, 2017
    Inventors: Probir Kumar GUHA, Michael J. SIWAJEK, Michael J. HILTUNEN, Shane SKOP
  • Publication number: 20160375649
    Abstract: A process for forming a composite sandwich panel assembly is provided that includes positioning a top sheet and a bottom sheet on opposing sides of an open pore matrix core. The top sheet, bottom sheet, and core are exposed to a heat source with the application of a clamping pressure to the top and the bottom sheet. The heat source is then removed and the clamping pressure maintained for a period of time. The clamping pressure is removed when the top sheet, bottom sheet, and core have cooled and fused together. An assembly formed by such a process is also provided.
    Type: Application
    Filed: December 8, 2014
    Publication date: December 29, 2016
    Inventors: PROBIR KUMAR GUHA, PHILIPPE BONTE, DOMINIQUE BOYER, CHRISTOPHER JOHNSTON
  • Patent number: 9499688
    Abstract: A molding composition formulation is provided that includes polypropylene, glass fiber, and a polypropylene substitute including recycled sheet molding composition transfer film. The polypropylene substitute is present from 1 to 35 total weight percent also may include natural cellulosic fibers or powders. A process is provided by which the polypropylene substitute is mixed and homogenized and then mixed with polypropylene and additives, and thereafter glass fiber. A reduction in the amount of virgin polypropylene used is reduced compared to conventional thermoplastic glass fiber filled moldings.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: November 22, 2016
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Swati Neogi
  • Patent number: 9463584
    Abstract: The process for molding a thermoset sheet-molding composition or bulk-molding composition is provided that includes the exposure of a mold surface to a silsesquioxane monomer or pre-polymer material under conditions to induce polymerization of said material or said monomer to form a mold release coating on the surface. The thermoset sheet-molding composition or bulk-molding composition is then injected into the mold and into contact with said coating under conditions to cure the composition to form an article.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: October 11, 2016
    Assignee: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
    Inventors: Probir Kumar Guha, Michael J. Siwajek
  • Publication number: 20160288394
    Abstract: A process for resin transfer molding (RTM) with staggered injection of a resin is provided that injects resin into a plurality of injection ports of a mold. The temperature and pressure applied to the mold are controlled during injection to limit promote rapid filling of the mold cavity. The injection ports are activated for injecting the resin in any order of individually, in groups, or pairings. Fibers are readily added to the mold separately or within the resin. Cycle times of from 1 to 5 minutes are provided for the process.
    Type: Application
    Filed: December 3, 2014
    Publication date: October 6, 2016
    Inventors: Probir Kumar Guha, Michael J. Siwajek
  • Publication number: 20160208061
    Abstract: A process is provided for overmolding an insert or substrate with non-oriented thermoplastic fibers present in an amount that allows them to thermally bond in the presence of non-oriented filler fibers. The thermoplastic fiber fusion retains the filler fibers within the insert upon cooling. The filler fibers are selected to modify the properties of the insert and an overmolded article formed with the insert therein. Such overmolded articles are used in applications including vehicle components such as automotive interior light bases, posts, undercar components, cross members, chassis components, and frame components; architectural components such as home door interiors, sound damping panels, and weather resistant wood replacement. Articles formed with the inventive process yield weight reductions compared to conventional insert overmoldings, along with low scrap generation, process flexibility with respect to part shape and fiber material.
    Type: Application
    Filed: September 2, 2014
    Publication date: July 21, 2016
    Inventor: Probir Kumar Guha
  • Publication number: 20160199876
    Abstract: A method for forming an article from a thermoset resin containing particle filler of glass microspheres is provided and includes exposing the particle filler to plasma to increase activation sites on the particle filler; and crosslinking said particle filler to the thermoset set resin via the activation sites. The method provides an exemplary method for treating thermoset fillers to promote bonding to a thermoset matrix. The present invention further provides an apparatus for treating thermoset fillers to promote bonding to a thermoset matrix which includes a fluidized bed reactor; at. least one gas source; at least, one valve for isolating said one gas source: and at least one gas inlet in fluid communication with said at least one gas source for gas delivery to said a fluidized bed reactor.
    Type: Application
    Filed: October 30, 2014
    Publication date: July 14, 2016
    Inventors: Frank Macher, Probir Kumar Guha
  • Publication number: 20160152283
    Abstract: A vehicle component is provided that includes a first cured layer of a molding composition having a predominant fiber filler chopped glass fibers, a second cured layer of molding composition having a predominant fiber filler chopped carbon fibers, and a bonding agent with elongation properties configured to accommodate the differential coefficients of linear thermal expansion between the first cured layer and the second cured layer. The second cured layer is substantially devoid of glass fiber. The bonding agent is an elastomeric adhesive, which is operative from ?40 to 205° C. The first cured layer forms an outer skin layer surface of a vehicle and the second cured layer forms an interior layer, where the outer skin layer surface has a class-A finish.
    Type: Application
    Filed: June 26, 2014
    Publication date: June 2, 2016
    Inventors: Probir Kumar Guha, Michael Siwajek, Michael J. Hittunen, Shane Skop, Satish Haryadi
  • Publication number: 20160009905
    Abstract: A molding composition formulation is provided of a thermoset cross-linkable polyol having unsaturated backbone comprising the structure defined by formula 1: (1) a reinforcing filler; and optionally, a flame retardant, a UV stabilizer or a composition comprising one of the foregoing.
    Type: Application
    Filed: January 29, 2014
    Publication date: January 14, 2016
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael J. Hiltunen, Ashley B. Hartmann, Shane Michael Skop
  • Publication number: 20150376398
    Abstract: A molded article is provided that has a resin matrix having a surface, the resin matrix formed from cross-linked polyester resin or vinyl-ester resin. Glass fibers are crossed linked to the resin matrix via a silane coupling agent reactive with the matrix. A molded article is provided that has a resin matrix having a surface, the resin matrix formed from cross-linked polyester resin or vinyl-ester resin. Glass fibers each covalently bonded to at least one microspheroid matrix via a silane coupling agent reactive with a surface of the at least one microspheroids are present in increase the fiber pull strength. A sizing composition for treating glass fibers is also provided for use in such articles.
    Type: Application
    Filed: June 30, 2015
    Publication date: December 31, 2015
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael J. Hiltunen, Michael Z. Asuncion
  • Publication number: 20150375422
    Abstract: A preform for thermoset resin composition molding is provided that upon cure forms a variety of molded and fiber reinforced articles used in a variety of applications such as vehicle components including bed lines, body components, trim, interior components, and undercar components; architectural components such as trim and doors, marine components including hulls, trim, and cockpit pieces; and similar structures in aerospace settings. A novel slurry composition, a novel centrifugal process, or a combination thereof provide superior quality preforms that are created with greater throughput relative to conventional techniques. The inhibition of fiber movement between the time such a fiber contacts the mold, or fibers already in place on the mold, and the time the fibers are set in position provides a superior fiber homogeneity and randomized orientation relative to existing slurry techniques with attributes of low scrap generation, and process flexibility with respect to part shape and fiber material.
    Type: Application
    Filed: January 29, 2014
    Publication date: December 31, 2015
    Inventors: Probir Kumar GUHA, Kim Robert HAMMER, Joseph A. BODARY
  • Publication number: 20150376350
    Abstract: A molded article is provided that includes a resin matrix having a surface, the resin matrix formed from cross-linked polyester resin or vinyl-ester resin. Microspheroids having a mean diameter of from 16 to 45 microns are embedded in the resin matrix. The microspheroids having a specific gravity of between 0.19 and 0.6 and an isotactic crush strength of greater than or equal to 2750 kilopascals (kPa). Surface activating agent alkoxysilane molecules are covalently bonded to each of the microspheroids. Filler particles are also present in the resin matrix. Fibers are also present in in the resin matrix. The fibers being natural fibers, glass fibers, carbon fibers, or a combination thereof. The article has a specific gravity of between 0.80 and 1.25.
    Type: Application
    Filed: June 26, 2015
    Publication date: December 31, 2015
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael J. Hiltunen, Michael Z. Asuncion
  • Publication number: 20150367561
    Abstract: Pressurized air is conveyed through a manifold into contact with the first member via apertures having hole diameters of from 0.8 to 2.5 mm that are spaced apart at a distance of from 10 to 30 mm along the manifold to achieve a turbulent air flow pattern with a Reynolds number of greater than 2200 at a temperature of between 150 and 315° C. and at an air pressure between 0.5 and 10 pounds per square inch (psi) over ambient pressure onto the outer surfaces of the first member and the second member for heat curing a curable adhesive between the members to achieve adhesive cure in 60 to 90 seconds and free of any bond-line read-out visible to an unaided normal human eye.
    Type: Application
    Filed: January 29, 2014
    Publication date: December 24, 2015
    Inventors: Probir Kumar Guha, Brad Haskell, Hugh C. Foran
  • Publication number: 20150360425
    Abstract: A process of compression molding an article from a curable resin is provided that includes opening a mold to an open position by displacing an upper die having an upper mold surface from a lower die having a lower mold surface. Resin is placed a mold surface and the dies are closed to an intermediate start position at a rate of from 1 to 10 cm/sec. The dies are then closed to a start position at a rate of between 25 and 60% of the rate of closure to the intermediate position. A shroud volume is evacuated for at least 3 seconds to a reduced pressure of less than 0.16 atmospheres while continuing to press toward a mold cavity volume at a rate of between 12 and 30% of the rate of closure to the intermediate start. The reduced pressure is removed as the full compression is applied.
    Type: Application
    Filed: January 29, 2014
    Publication date: December 17, 2015
    Inventors: Probir Kumar Guha, Mayur S. Shah, Kim Robert Hamner