Patents Represented by Attorney Margareta LeMaire

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  • Novel propylene polymers
    Patent number: 4859757
    Abstract: Novel, substantially amorphous copolymers of propylene and ethylene are disclosed. The polymers have properties which make them applicable for use, e.g., as hot melt adhesives and as blending components in roofing materials.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: August 22, 1989
    Assignee: Rexene Products Company
    Inventors: Brian J. Pellon, George C. Allen, Michael P. Hughes
  • Novel propylene polymerization process
    Patent number: 4847340
    Abstract: A novel highly efficient process is disclosed for the production of substantially amorphous ethylene-propylene copolymers. The polymers have properties which make them applicable for use, e.g., as hot melt adhesives, as blending components in roofing materials, and as cable and wire flooding agents.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: July 11, 1989
    Assignee: Rexene Products Company
    Inventors: George C. Allen, Brian J. Pellon, Michael P. Hughes
  • Abrasion process for the manufacture of microporous film
    Patent number: 4832886
    Abstract: A vapor permeable and liquid impermeable microporous film suitable for diaper back sheets and other disposable applications is produced by abrading a filled, unoriented film by passing it through at least one set of at least two cooperating nip rollers, each having an abrasive grit surface.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: May 23, 1989
    Assignee: El Paso Products Company
    Inventor: Noel L. Douglas
  • Isomerization of butane
    Patent number: 4814544
    Abstract: Normal butane is isomerized to isobutane by means of a catalyst composition consisting essentially of 95 to 99 weight percent fluorosulfuric acid and 1 to 5 weight percent of a protic co-acid selected from the group consisting of hydrogen fluoride, sulfuric acid, trifluoromethanesulfonic acid and mixtures thereof. The isomerization is carried out under low temperatures and at short contact times.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: March 21, 1989
    Assignee: El Paso Products Company
    Inventor: George A. Olah
  • Process for the manufacture of porous film
    Patent number: 4778634
    Abstract: A vapor and liquid permeable porous film suitable for disposable sanitary apparel structures is produced by first abrading an unoriented film by passing it through at least one set of at least two cooperating nip rollers, each having an abrasive grit surface and then subjecting the unoriented abraded film to a corona treatment.
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: October 18, 1988
    Assignee: El Paso Products Company
    Inventor: Noel L. Douglas
  • Novel propylene polymerization process
    Patent number: 4736002
    Abstract: A novel process for the production of substantially amorphous interpolymers of propylene, ethylene and optionally a third alpha-olefin comonomer having between 4 and 8 carbon atoms per molecule is disclosed. The polymers have properties which make them applicable for use, e.g., as hot melt adhesives and as blending components in roofing materials.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: April 5, 1988
    Assignee: El Paso Products Company
    Inventors: George C. Allen, Brian J. Pellon, Michael P. Hughes
  • Process for the recovery of amorphous devaporized polyalphaolefin
    Patent number: 4710563
    Abstract: A circulation loop is provided between a point next to the outlet of an amorphous polyalphaolefin polymerization zone and a flash zone, carrying a stream of molten devaporized polymer product.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: December 1, 1987
    Assignee: El Paso Products Company
    Inventor: Steven L. Oetting
  • Nucleation of propylene polymers
    Patent number: 4704421
    Abstract: Propylene polymers produced by high-activity support based coordination catalysts are effectively nucleated with benzoic acid and adipic acid, yielding molding resins of high clarity.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: November 3, 1987
    Assignee: El Paso Products Company
    Inventor: Frederick M. Teskin
  • Process for the production of stable noncorrosive amorphous polyalphaolefins
    Patent number: 4701489
    Abstract: The catalyst residues present in an on-purpose produced amorphous polyalphaolefin are deactivated by contacting the molten polymer with sufficient water to provide at least a 3:1 water/Al mole ratio and then the polymer is stabilized with a hindered phenolic antioxidant.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: October 20, 1987
    Assignee: El Paso Products Company
    Inventors: Michael P. Hughes, Brian J. Pellon
  • Polypropylene compositions of improved clarity
    Patent number: 4692489
    Abstract: Incorporation of an ethoxylated amine in a sodium benzoate nucleated propylene polymer resin synergistically improves clarity as well as yellowness over what is achieved by use of sodium benzoate or ethoxylated amine alone.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: September 8, 1987
    Assignee: El Paso Products Company
    Inventors: Harold K. Ficker, Frederick M. Teskin
  • Injection blow molding grade propylene polymers
    Patent number: 4684683
    Abstract: An injection blow molding grade resin or improved clarity and processability is obtained by incorporating N,N.sup.1 -ethylene bisstearamide and an ethoxylated amine into a sodium benzoate nucleated propylene polymer.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: August 4, 1987
    Assignee: El Paso Products Company
    Inventors: Harold K. Ficker, Frederick M. Teskin
  • Radiation sterilizable propylene polymer compositions and articles manufactured therefrom
    Patent number: 4666959
    Abstract: A propylene polymer molding composition which is resistant to discoloration and losses in physical properties upon sterilization by high energy radiation is comprised of a blend of a propylene polymer with small amounts of a polymeric hindered amine, an alkyl phosphite and a specific hindered phenolic antioxidant as necessary additives.
    Type: Grant
    Filed: December 10, 1985
    Date of Patent: May 19, 1987
    Assignee: El Paso Products Company
    Inventors: Paula S. Weissberger, Bennie M. Lucas
  • Method of reducing compressor gas leakage
    Patent number: 4654154
    Abstract: Gas leakage from a high pressure compressor used in providing olefin monomer feed to a high pressure polymerization reactor is minimized by the addition of an antioxidant to the cylinder lubrication fluid to provide an antioxidant concentration of from about 3 wt % to about 10 wt %.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: March 31, 1987
    Assignee: El Paso Polyolefins Company
    Inventors: Karl W. Wikelski, Michael S. Conrad
  • Tertiary-butylstyrene recovery
    Patent number: 4543438
    Abstract: The reaction effluent from an oxydehydrogenation reactor, used in the preparation of t-butylstyrene from t-butylethylbenzene, is subjected to liquid-liquid extraction with a sulfolane-water mixture to separate unreacted t-butylethylbenzene from t-butylstyrene.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: September 24, 1985
    Assignee: El Paso Products Company
    Inventors: James D. Henery, Charles L. Edwards, Stephen C. McHaney
  • Refining of tertiary butylstyrene
    Patent number: 4543437
    Abstract: Dialkenylbenzene compounds, present in t-butylstyrene in small quantities as impurities are removed by liquid/liquid extraction using aqueous sulfolane as solvent.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: September 24, 1985
    Assignee: El Paso Products Company
    Inventors: James D. Henery, Stephen C. McHaney, Charles L. Edwards
  • Heat-sterilizable polyolefin compositions and articles manufactured therefrom
    Patent number: 4540416
    Abstract: Heat-sterilizable films are made from a polymer blend of about 10 to about 60 wt % random propylene-ethylene copolymer containing from about 1 to about 6 wt % ethylene-derived units and about 40 to about 90 wt % linear low density polyethylene. The films are especially useful in the manufacture of collapsible parenteral solution bags and overwraps.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: September 10, 1985
    Assignee: El Paso Polyolefins Company
    Inventors: Kiyoshi Hattori, John H. Myers
  • Removal of sulfur compounds from pentane
    Patent number: 4540842
    Abstract: Pentane derived from fractionation of sulfur-containing natural gasoline is desulfurized to low levels of sulfur, e.g., 1 ppm or below, in a process comprised of contacting the pentane in a first zone with molecular sieve adsorbent to remove dimethylsulfide and then in a second zone with activated carbon to remove carbon disulfide.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: September 10, 1985
    Assignee: El Paso Products Company
    Inventor: George C. Allen
  • Heat-sterilizable polyolefin compositions and articles manufactured therefrom
    Patent number: 4536549
    Abstract: Heat-sterilizable films are made from a polymer blend of about 10 to about 60 wt % random propylene-ethylene copolymer containing from about 1 to about 6 wt % ethylene-derived units and about 40 to about 90 wt % linear low density polyethylene. The films are especially useful in the manufacture of collapsible parenteral solution bags and overwraps.
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: August 20, 1985
    Assignee: El Paso Polyolefins Company
    Inventors: Kiyoshi Hattori, John H. Myers
  • Refining of tertiary butylstyrene
    Patent number: 4514261
    Abstract: Isopropenylstyrene, present in t-butylstyrene in small quantities as an impurity, is removed by extractive distillation using sulfolane as solvent.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: April 30, 1985
    Assignee: El Paso Products Company
    Inventor: Glen F. Crum
  • Increasing the octane number of natural gasoline with trifluoromethanesulfonic acid
    Patent number: 4508618
    Abstract: Natural gasoline of low octane value derived from natural gas is upgraded to higher octane value by means of catalyst consisting essentially of trifluoromethanesulfonic acid at temperatures between about 80.degree. C. and about 120.degree. C., and preferably between about 100.degree. C. and about 120.degree. C.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: April 2, 1985
    Assignee: El Paso Products Company
    Inventor: George A. Olah