Patents by Inventor Lawrence Spenadel

Lawrence Spenadel 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: 6270856
    Abstract: The invention relates to electric power cables, transmission lines or coaxial cables having at least one polymeric component. This polymeric component generally is a conducting, semiconducting, protective or insulating component. The electrical cables of this invention have improved resistance to water treeing and other improved properties. The polymer generally comprises ethylene polymerized with at least one C3 to C20 alpha-olefin and optionally at least one C3 to C20 polyene. The polymer utilized has a density in the range of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.2 dg/min. to about 100 dg/min., a molecular weight distribution in the range of about 1.5 to about 30, and a composition distribution breadth index greater than about 45 percent.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: August 7, 2001
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Monica Louise Hendewerk, Aspy Keki Mehta, Lawrence Spenadel
  • Patent number: 5246783
    Abstract: Disclosed are electrically conductive and semiconductive devices utilizing polymers having resistance to water treeing and good dielectric properties. The polymer comprises ethylene polymerized with at least one C.sub.3 to C.sub.20 alpha-olefin and optionally at least one C.sub.3 to C.sub.20 polyene. The polymer utilized has a density in the range of about 0.86 g/cm.sup.3 to about 0.96 g/cm.sup.3, a melt index in the range of about 0.2 dg/min to about 100 dg/min, a molecular weight distribution in the range of about 1.5 to about 30, and a composition distribution breadth index greater than about 45 percent. For the polymer utilized, the tree rating is generally less than about 40, the power factor is in the range of about 0.0002 to about 0.0005, and the dielectric constant is in the range of about 1.8 to about 2.4.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: September 21, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Lawrence Spenadel, Monica L. Hendewerk, Aspy K. Mehta
  • Patent number: 5177147
    Abstract: The present invention relates to compositions comprising at least one elastomer and at least one plastic. The composition can be produced by preparing the elastomer and then blending it with the plastic. The composition can be subjected to an additional step of curing.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: January 5, 1993
    Assignee: Advanced Elastomer Systems, LP
    Inventors: Lawrence Spenadel, Joel H. Grosser, Stephen M. Dwyer
  • Patent number: 5011891
    Abstract: The present invention relates to compositions comprising at least one elastomer and at least one plastic. The composition can be produced by preparing the elastomer and then blending it with the plastic. The composition can be subjected to an additional step of curing.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: April 30, 1991
    Assignee: Exxon Research & Engineering Company
    Inventors: Lawrence Spenadel, Joel H. Grosser, Stephen M. Dwyer
  • Patent number: 4843129
    Abstract: A composition comprising:(a) at least one copolymer having at least one of M.sub.w /M.sub.n less than 2 and M.sub.z /M.sub.w less than 1.8; and(b) at least one plastic composition.The composition can be produced by preparing the elastomer and then blending it with the plastic. The composition can be subjected to an additional step of curing.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: June 27, 1989
    Assignee: Exxon Research & Engineering Company
    Inventors: Lawrence Spenadel, Joel H. Grosser, Stephen M. Dwyer
  • Patent number: 4673620
    Abstract: Nonvulcanized, thermoplastic elastomeric compositions useful in high quality, low voltage insulation. The compositions comprise polyolefin plastics blended with a copolymer of ethylene and an unsaturated ester of a lower carboxylic acid, olefinic elastomer and mineral filler and/or carbon black filler, and, optionally, hydrocarbon oil. Preferably the filler is alumina trihydrate which results in a flame-retardant insulation useful in building and communication wire.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: June 16, 1987
    Assignee: Exxon Research & Engineering Co.
    Inventors: Cindy B. Shulman, Lawrence Spenadel
  • Patent number: 4268552
    Abstract: This invention relates to improved front and rear fascia of a motor vehicle having improved flexibility, wherein the improved elastomeric composition used in forming the fascia includes a neutralized sulfonated elastomeric polymer, a polyolefinic thermoplastic resin and a preferential plasticizer. The formed fascia has an elastomeric-rich inner core which is composed of a blend of the neutralized sulfonated elastomeric polymer being plasticized with a preferential plasticizer and a polyolefinic thermoplastic resin, and a thermoplastic-rich outer shell which is composed of a thermoplastic blend of a major portion of the polyolefinic thermoplastic resin and a minor portion of the neutralized sulfonated elastomeric polymer being plasticized with a preferential plasticizer.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: May 19, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Ilan Duvdevani, Lawrence Spenadel
  • Patent number: 4244861
    Abstract: An injection-moldable, peroxide crosslinkable elastomeric composition comprises a mixture of a crystalline interpolymer comprising ethylene and propylene; a low density polyethylene; one or more multifunctional vinylic or allylic monomers; a medium to high structure form of carbon; and an organic peroxide.The composition is particularly useful for the fabrication of injection molded structures which are required to flex on impact and return to their original shape when the distorting force is released. Typical structures are automotive fender extensions, grilles and front and rear fascia.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: January 13, 1981
    Assignee: Exxon Research & Engineering Co.
    Inventors: Lawrence Spenadel, Ilan Duvdevani, Edward N. Kresge
  • Patent number: 4170664
    Abstract: A process for the production of cross-linked resilient automotive body components having a cured surface coating from a thermoplastic elastomeric composition substantially free from added vulcanizing or free-radical inducing agents comprises: Fabricating an uncured component from said composition; applying to the component a radiation-curable surface coating; and simultaneously curing the surface coating and cross-linking the composition comprising the fabricated component by exposing the coated component to high-energy ionizing radiation.
    Type: Grant
    Filed: July 13, 1978
    Date of Patent: October 9, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventors: Lawrence Spenadel, S. Alexander Banks