Patents by Inventor Srivatsan Srinivas Iyer

Srivatsan Srinivas Iyer 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: 8709560
    Abstract: Polymeric compositions and methods of making and using such compositions are provided. The compositions incorporate a first polymeric component that is at least one high density polyethylene and a second polymeric component that is at least one polymer including propylene-derived units having a heat of fusion of less than 75 J/g wherein the propylene-derived units have an isotactic triad fraction of about 65% to about 99%. The polymeric compositions are found to have desirable environmental stress crack resistance properties and impact resistance properties. The polymeric compositions are useful in a variety of applications such as molded containers and extruded pipes.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: April 29, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Srivatsan Srinivas Iyer, Thomas Michael Miller
  • Patent number: 8071681
    Abstract: Polymeric compositions and methods of making and using such compositions are provided. The compositions incorporate at least one component that is a polymer including propylene-derived units and at least one component that is a styrenic block copolymer. The polymeric compositions are found to have desirable elastomeric properties while at the same time exhibiting beneficial processability characteristics. The unique combination of processability and performance attributes result in the polymeric compositions useful in a variety of applications such as films, fibers, woven and non-woven fabrics, sheets, molded objects, extruded forms, thermoformed objects, and all products made from such application materials.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: December 6, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Srivatsan Srinivas Iyer, Sudhin Datta, Trazollah Ouhadi
  • Patent number: 8013069
    Abstract: Blends of at least two polymers incorporating propylene-derived units and processes for producing such blends are provided. The first polymer of the blend is a low crystallinity polymer including propylene-derived units. The second polymer is a high crystallinity polymer including propylene-derived units. The polymer blends exhibit the beneficial performance characteristics of low crystallinity propylene polymers while minimizing certain processing and handling problems associated with low crystallinity propylene polymers. Low crystallinity propylene polymer pellets often exhibit a tendency to agglomerate because of the softness of such particles. Agglomeration of the pellets creates problems in handling and processing the particles. The polymer blends disclosed reduce the tendency of polymer pellets to agglomerate while maintaining the desirable physical properties, such as elastomeric properties, exhibited by low crystallinity propylene polymers.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: September 6, 2011
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventors: Bruce Allan Harrington, Michael Glenn Williams, Sudhin Datta, Srivatsan Srinivas Iyer
  • Patent number: 7781530
    Abstract: Polymeric compositions and methods of making and using such compositions are provided. The compositions incorporate a first component that is an isobutylene-based polymer and a second component having propylene-derived units and polyene derived units. The polymeric compositions have desirable processability characteristics, particularly for injection molding applications.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: August 24, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Hsien-Chang Wang, Wai Keung Wong, Srivatsan Srinivas Iyer, Pascal Van Hoeck
  • Patent number: 7683129
    Abstract: This invention relates to a film comprising a heterogeneous blend of: 1) from 60 to 99 wt % of one or more semi-crystalline polymers; and 2) from 1 to 40 wt % of one or more semi-amorphous polymers; where the blend has: an MFR of 0.5 to 100 dg/min, a haze of 20% or less, and a permanent set of greater than 65%; and where the film is 2.5 to 635 microns thick and has: a haze of 10% or less, a 1° Secant tensile modulus of 100,000 to 30,000 psi, an Elmendorf tear in the machine direction and transverse direction of 45 g/mil or more, a total energy impact of 3 J or more; and a 45 degree gloss of 82 or more.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: March 23, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Aspy K. Mehta, Sudhin Datta, Wen Li, Srivatsan Srinivas Iyer
  • Patent number: 7629416
    Abstract: The present invention relates to a composition comprising 1) from 1 to 98 weight % of a first propylene polymer having a melting point of 100° C. or more, 2) from 5 to 98 weight % of a second propylene polymer having a heat of fusion of 70 J/g or less and a tacticity index of 75% or more, 3) from 0.5 to 75 weight % of a non-functionalized plasticizer (“NFP”) having a viscosity index of 120 or more, based upon the weight of the first polymer, second polymer, and the NFP, and articles therefrom.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: December 8, 2009
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Wen Li, Mun Fu Tse, Srivatsan Srinivas Iyer, Bryan Robert Chapman
  • Publication number: 20090197029
    Abstract: Polymeric compositions and methods of making and using such compositions are provided. The compositions incorporate a first polymeric component that is at least one high density polyethylene and a second polymeric component that is at least one polymer including propylene-derived units having a heat of fusion of less than 75 J/g wherein the propylene-derived units have an isotactic triad fraction of about 65% to about 99%. The polymeric compositions are found to have desirable environmental stress crack resistance properties and impact resistance properties. The polymeric compositions are useful in a variety of applications such as molded containers and extruded pipes.
    Type: Application
    Filed: September 16, 2005
    Publication date: August 6, 2009
    Inventors: Srivatsan Srinivas Iyer, Thomas Michael Miller