Patents by Inventor Donald A. White

Donald A. White 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: 5356950
    Abstract: A grafted polymer of an isomonoolefin and an alkylstyrene, such as a maleic anhydride-grafted copolymer of isobutylene and para-methylstyrene, is provided. Processes for preparing the grafted polymer are also provided.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: October 18, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald A. White, Hsien C. Wang
  • Patent number: 5262489
    Abstract: A process is provided for producing a low molecular weight isoolefin polymer by contacting at conversion conditions a higher molecular weight saturated isoolefin polymer, for example, polyisobutylene or a copolymer of a C.sub.4 to C.sub.7 isoolefin and a para-alkylstyrene, in the melt phase, with an initiator, such as an oxygen-containing gas, an organic peroxide or an azo compound.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: November 16, 1993
    Inventors: Donald A. White, Lawrence W. Flatley, Richard C. Yeh, Raymond F. Murphy
  • Patent number: 5238990
    Abstract: A thermoplastic composition is provided which comprises a polyamide, a grafted polymer of an isomonoolefin and an alkylstyrene, such as a maleic anhydride-grafted copolymer of isobutylene and para-methylstyrene, and optionally a polyolefin polymer.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: August 24, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Thomas C. Yu, Donald A. White, Hsien C. Wang
  • Patent number: 5225483
    Abstract: A thermoplastic composition is provided which comprises a blend of a thermoplastic, such as a copolymer of styrene and maleic anhydride; polypropylene; a modified elastomeric component, such as EPM or EPDM, which has been modified with a specified functional monomer, such as a 2-substituted-5-norbornene, and an amine-modified maleic anhydride grafted polypropylene. The composition has improved properties.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: July 6, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Sudhin Datta, Narayanaswami R. Dharmarajan, Jean M. Dekoninck, Donald A. White
  • Patent number: 5191022
    Abstract: A covulcanizable polymer blend of a highly unsaturated rubbery polymer and a sulfer imide-modified teropolymer of ethylene, a higher alpha olefin and a non-conjugated diene is provided. Processes for preparing the blend and vulcanizing the blend are also provided.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: March 2, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald A. White, Stanley J. Brois, Bruce D. Allison
  • Patent number: 5187240
    Abstract: N-halothiosulfonamide-modified non-rubbery thermoplastic polyolefins are provided. The modified polyolefin products are prepared by reaction of a non-rubbery thermoplastic polyolefin polymer with an N-halothiosulfonamide in the absence or, preferably, in the presence of a catalyst. The preferred catalyst for use in the preparation of these products are salts of weak acids of specified metals.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: February 16, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Donald A. White
  • Patent number: 5151467
    Abstract: N-halothiosulfonamide-modified rubber products are provided. The modified rubber products are prepared by reaction of a rubber, such as a butyl rubber or a halogenated butyl rubber, with a N-halothiosulfonamide in the absence or in the presence of a catalyst.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: September 29, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Donald A. White
  • Patent number: 5086028
    Abstract: A catalyst composition is provided which comprises at least one specified metal salt of a weak acid and a zinc salt of a weak acid or an iron salt of a weak acid. A process for preparing a N-halothio-sulfonamide-modified terpolymer of ethylene, an alpha olefin and a diene utilizing the catalyst is also provided. The catalyst is a selective catalyst in this process.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: February 4, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Donald A. White
  • Patent number: 5057555
    Abstract: A coating composition useful for a finish for automobiles and trucks in which the film forming binder contains reactive binder components of about(a) 25-90% by weight, based on the weight of the binder, of an acrylic polymer having at least two reactive anhydride groups composed of polymerized monomers of an ethylenically unsaturated anhydride and polymerized monomers from the group consisting of alkyl methacrylate, alkyl acrylate and any mixtures thereof, wherein the alkyl groups have 1-8 carbon atoms and the polymer has a weight average molecular weight of about 2,000-50,000;5-50% by weight, based on the weight of the binder, of a glycidyl component having at least two reactive glycidyl groups;5-50% by weight, based on weight of the binder, of a polymeric component containing multiple hydroxy groups; andthe composition contains about 0.1-5% by weight; based on the weight of the binder, of a catalyst.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: October 15, 1991
    Inventors: Donald A. White, Robert J. Barsotti, Patrick H. Corcoran, Lili W. Altschuler
  • Patent number: 5037896
    Abstract: A process is provided for preparing a N-halothiosulfonamide modified polyolefin of at least one 1-alkene, and at least one diene which, after incorporation in the polyolefin includes a carbon atom which is fully substituted, for example, 5-ethylidene-2-norbornene. The process comprises reacting a N-halothiosulfonamide with the polyolefin in the presence of a non-nucleophilic base and a catalyst comprising a salt of a weak acid of specified metals. The process is particularly suited to be performed in the melt phase.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: August 6, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Sudhin Datta, Donald A. White
  • Patent number: 5034467
    Abstract: N-halothiosulfonamide-modified non-rubbery thermoplastic polyolefins are provided. The modified polyolefin products are prepared by reaction of a non-rubbery thermoplastic polyolefin polymer with an N-halothiosulfonamide in the absence or, preferably, in the presence of a catalyst. The preferred catalyst for use in the preparation of these products are salts of weak acids of specified metals.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: July 23, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventor: Donald A. White
  • Patent number: 5034468
    Abstract: N-halothiosulfonamide-modified rubber products are provided. The modified rubber products are prepared by reaction of a rubber, such as a butyl rubber or a halogenated butyl rubber, with a N-halothiosulfonamide in the absence or in the presence of a catalyst.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: July 23, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Donald A. White
  • Patent number: 5017662
    Abstract: A catalyst composition is provided which comprises at least one specified metal salt of a weak acid and a zinc salt of a weak acid or an iron salt of a weak acid. A process for preparing a N-halothio-sulfonamide-modified terpolymer of ethylene, an alpha olefin and a diene utilizing the catalyst is also provided. The catalyst is a selective catalyst in this process.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: May 21, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventor: Donald A. White
  • Patent number: 4956420
    Abstract: Preparation of halothio-sulfonamide-modified terpolymers having a low degree of unsaturation is accomplished by preferably reacting N-chlorothio-sulfonamide with an ethylene-(alpha-olefin)-diene monomer terpolymer comprising, for example, 1,4- hexadiene and/or dicyclopentadiene, in the presence of a catalyst of the formula MAn, where A is an anion or mixture of anions of a weak acid, and M is a metal selected from copper, antimony, bismuth and tin and n is a number which corresponds to the oxidation state of M divided by the valence of said weak acid anion. The reaction is preferably carried out in a melt phase process. Additionally, metals such as zinc and iron can be used at low concentrations in a melt phase process or at short reaction times in a solution process. Mixtures of such modified terpolymers with highly unsaturated rubbery polymers and vulcanizates of such mixtures are particularly useful in pneumatic tire sidewalls.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: September 11, 1990
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald A. White, Richard S. Auda, William M. Davis, David T. Ferrughelli
  • Patent number: 4701841
    Abstract: The present circuitry operates with a computer system which employs a CPU, memory, and other data handling devices such as peripherals and terminals. All of the foregoing elements of the computer system are connected to a major signal bus. The computer system functions by transmitting data and instructions from one element to another in accordance with a principal protocol. However, the present system does provide for decoding address signals, which are transmitted on the major signal bus, and if such address signals are acceptable to the memory then a new set of timing signals and a new set of protocol control signals are generated. In response to these new timing signals and new protocol control signals, data is transferred between the memory and the CPU at a faster rate and under a different protocol than the principal protocol thereby making the computer system function faster than heretofore.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: October 20, 1987
    Assignee: Digital Equipment Corporation
    Inventors: Gerald O. Goodrich, Michael M. Tehranian, Donald A. White
  • Patent number: 4564492
    Abstract: This invention relates to a process for producing an oriented, crystalline poly(acetylene) (III) in film or fibrillar form by solvent casting a film from a solution of a polymer of the general formula (V) derived from a precursor monomer (IV), and transforming the pre-cast film of polymer (V) under tension or in a stress field into the poly(acetylene) (III). The transformation is carried out at a temperature between 20.degree. and 200.degree. C. under reduced pressure over a duration of between 1 and 100 hours in an atmosphere inert to the precursor polymer (V) film and to the poly(acetylene) (III). Poly(acetylenes) are conducting polymers and find use in solid state batteries, field effect transistors and the like.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: January 14, 1986
    Assignee: The British Petroleum Company, p.l.c.
    Inventors: David C. Bott, Donald White
  • Patent number: 4486613
    Abstract: A process for hydroxylating olefins, such as ethylene or propylene, using an oxidant selected from organic hydroperoxides, H.sub.2 O.sub.2, and oxygen and a catalyst composition comprising at least one osmium carbonyl catalyst, such as Os.sub.3 (CO).sub.12, and optionally at least one cocatalyst such as NaI, is disclosed.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: December 4, 1984
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert C. Michaelson, Richard G. Austin, Donald A. White
  • Patent number: 4431892
    Abstract: The electronic components in the cavity of a modular induction cooktop cartridge are cooled as a result of ventilation provided by a proximity ventilation system. The cooktop cartridge is raised relative to the surface of the range and ports are provided on opposite sides of the cartridge in the raised portion whereby the proximity ventilation system educts air from the cavity and thereby causes an air circulation path through the cavity.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: February 14, 1984
    Assignee: Jenn-Air Corporation
    Inventor: Donald A. White
  • Patent number: 4413151
    Abstract: A process for hydroxylating olefins using a supported osmium catalyst such as Os.sub.3 (CO).sub.12 adsorbed on a support, such as MgO, and optionally in conjunction with a co-catalyst such as NaI, is disclosed.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: November 1, 1983
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert C. Michaelson, Richard G. Austin, Donald A. White
  • Patent number: 4120761
    Abstract: Electrolysis of a substantially anhydrous electrolysis medium comprising a primary alcohol having at least one beta-hydrogen atom and anhydrous hydrogen halide selected from the group consisting of hydrogen chloride and hydrogen bromide yields acetals of 2-haloaldehydes corresponding to the primary alcohol.
    Type: Grant
    Filed: December 15, 1977
    Date of Patent: October 17, 1978
    Assignee: Monsanto Company
    Inventor: Donald A. White