Patents Examined by Thomas R. Weber
  • Patent number: 5928682
    Abstract: A method and apparatus for the manufacture of optical polymer contact lenses in a closed mold, where a mold cavity is created between a front curve insert and a back curve insert, the side walls of the mold cavity being formed by the inner wall of a movable annular gate collar, the collar being positioned in a retracted position during polymer dosing and then moved prior to polymer cure into an extended position to complete the mold cavity and to separate the polymer curing inside the mold cavity from any waste polymer outside of the mold cavity.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: July 27, 1999
    Assignee: Johnson & Johnson Vision Products, Inc.
    Inventors: Joseph E. Janca, Carl G. Crowe
  • Patent number: 5866026
    Abstract: A adjustable mold box assembly for forming molded concrete products includes a pair of opposed substantially parallel end plates joined at both ends by a pair of opposed substantially parallel mounting brackets. A selected plurality of partition plates extend between the end plates to define a plurality of cavities for forming molded products in accordance with the number and dimension of molded products desired. A slot is formed along the inside of each end plate substantially along the length thereof. Tabs which extend from opposing ends of each partition plate include a stud transversely mounted on the end plate using ring nuts. The opposing tabs and studs of each end plate are received in opposing end plate slots. End liners are bolted to the inside surface of each end plate over the studs on each side of each partition plate with the ring nuts bearing against the surface of the end liner.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: February 2, 1999
    Assignee: Columbia Machine, Inc.
    Inventor: Llewellyn L. Johnston
  • Patent number: 5844054
    Abstract: A continuous process for the polymerization of one or more alpha-olefins in the gas phase in the presence of a chromium based catalyst, under polymerization conditions including the reaction temperature, the pressure, and the target oxygen to alpha-olefin molar ratio operating point required for desired resin properties.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: December 1, 1998
    Inventors: Paul Kevin Samples, William Albert Matthews, John Roberts Parrish, Ivan Jeremy Hartley, Kiu Hee Lee
  • Patent number: 5837299
    Abstract: A cooling assembly includes a base and at least one body having at least one opening, each opening including an inner surface. An insert is situated within each opening, each insert having an inner surface and an outer surface. The outer surface of each insert confronts a corresponding body inner surface to define a volume. At least one connection is provided between the volume and a source of fluid coolant for filling the volume with the fluid coolant. The insert includes at least one surface which moves to conform at least in part to the outer surface of a molded article whereby heat transfer occurs between the molded article and the fluid coolant across the insert.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: November 17, 1998
    Assignee: Electra Form, Inc.
    Inventors: Timothy L. Bright, Stephen A. Bright, Terry A. Shroder, Daniel A. Hartman
  • Patent number: 5827535
    Abstract: A softgel includes a filled portion and a non-filled portion. At least one of the filled and non-filled portions has an external surface having defined thereon an impressed graphical representation.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: October 27, 1998
    Assignee: Banner Pharmacaps, Inc.
    Inventor: Dan D. Stone
  • Patent number: 5824746
    Abstract: The disclosed invention provides novel golf ball compositions which contain olefinic based ionomers and non-ionic olefinic copolymers produced by use of metallocene catalysts. These compositions exhibit improved mechanical properties such as tensile and flexural properties, and can be foamed or unfoamed. Golf balls that employ at least one layer of these blends in any of the golf ball cover, core, or a mantle situated between the cover and the core provide ball properties and performance similar to and in some cases better than the state of the art ionomer based golf balls.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: October 20, 1998
    Assignee: Acushnet Company
    Inventors: Kevin M. Harris, Murali Rajagopalan
  • Patent number: 5807976
    Abstract: A method for product recovery method of polyolefins, particularly high-molecular-weight amorphous poly alpha-olefins, wherein the use of water during the method is significantly decreased and wherein the intermediate stage of storing and drying the chunk form of the polyolefin is eliminated. Polyolefins produced in a reactor are heated in a kneader to remove any unreacted monomer(s). The polyolefin material in a liquid form is then transferred directly to an extruder to further remove any unreacted monomer(s) and catalyst(s). Finally, the polyolefin material is pelletized using a pelletizer.
    Type: Grant
    Filed: February 9, 1996
    Date of Patent: September 15, 1998
    Inventor: Stephen McHaney
  • Patent number: 5807916
    Abstract: The process consists in the agglomeration of fine particles of superabsorbent polymer, carried out by introducing an aqueous solution of monomer into a slurry of aqueous polymer dispersed within a hydrocarbon liquid, this introduction being performed directly at the temperature and in conditions of polymerization of the monomer. A superabsorbent product is thus obtained in a very good yield, in the form of aggregates of particles such that the fraction passing through a 100-micron screen is less than 1%.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: September 15, 1998
    Assignee: Elf Atochem S. A.
    Inventors: Christian Collette, Manuel Hidalgo, Andre Kowalik, Emmanuel Puchois, Shu-Rong Rebre
  • Patent number: 5804677
    Abstract: The invention relates to continuous gas fluidized bed polymerization of olefins, especially ethylene, propylene, or mixtures of these with other alpha olefins, wherein the monomer-containing recycle gas employed to fluidize the bed is cooled to condense out at least some liquid hydrocarbon. The condensed liquid, which can be a monomer or an inert liquid, is separated from the recycle gas and is fed directly to the bed to produce cooling by latent heat of evaporation. The liquid feeding to the bed can be through gas-induced atomizer nozzles (FIG. 2), or through liquid-only nozzles. The process provides substantially improved productivity of gas fluidized bed polymerization of olefins.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: September 8, 1998
    Assignee: BP Chemicals Limited
    Inventors: Jean-Claude Chinh, Michel C. H. Filippelli, David Newton, Michael Bernard Power
  • Patent number: 5804676
    Abstract: A process for continuously preparing a high quality methacrylic polymer with a high productivity is provided. The process comprises continuously polymerizing methyl methacrylate alone or a monomer mixture of methyl methacrylate and an alkyl acrylate by a solution polymerization using methanol as a solvent, directly feeding the resulting polymerization reaction product to an extruder having a plurality of vents, and extruding the polymer, while volatiles are removed through the vents.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: September 8, 1998
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Shinichi Hieda, Masahiro Kurokawa, Yasushi Higuchi, Shojiro Kawahara
  • Patent number: 5800764
    Abstract: A method for forming a liner in a closure for a container includes forming a plastic closure cap having a circular top wall portion and a depending annular skirt portion depending from the top wall portion, and depositing a quantity of moldable liner forming plastic material in the cap. A liner forming assembly which has a liner tip and a liner sleeve, the liner tip being axially movable relative to said liner sleeve, and the liner sleeve defining a plurality of circumferentially located, radially oriented venting channels positioned on an outer surface thereof, is advanced into the cap to engage the sleeve with the cap, adjacent to the venting channels, to define a liner space. The liner tip is advanced into the cap, relative to the liner sleeve, to compress a liner forming material to form the liner while restraining the flow of moldable plastic between the sleeve and the cap, and while venting gas out of the liner space through the venting channels.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: September 1, 1998
    Assignee: Alcoa Closure Systems International, Inc.
    Inventors: Lawrence M. Smeyak, Alex I. Lerner
  • Patent number: 5777055
    Abstract: The invention relates to a polypropylene film comprising a layer which comprises polypropylene and resin. The resin has a mean molecular weight M.sub.w of .gtoreq.1500. The invention also relates to a process for the production of the film, and to the use of the film.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: July 7, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Peiffer, Ursula Murschall, Thomas Dries
  • Patent number: 5777049
    Abstract: A loop polymerization process or apparatus primarily for vinyl and related monomers in aqueous suspension. The monomers and water are pumped into four rectangular passageway loops (10) operated at a sheer rate above 800 s.sup.-1 while sustaining laminar flow. The polymer is removed from the passageway loops (10) at a T connector (16).
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: July 7, 1998
    Inventors: Kenneth Raymond Geddes, Mohammed Bashair Khan
  • Patent number: 5767207
    Abstract: A process for preparing a polymer cement which is relatively free of alkali metal salt by preparing the polymer cement with a polymerization terminating agent which is a diketone which leaves alkali metal salt in the cement which is readily removable by centrifugation.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: June 16, 1998
    Assignee: Shell Oil Company
    Inventors: John David Wilkey, Zaida Diaz
  • Patent number: 5763541
    Abstract: The present invention provides a process and apparatus for feeding powders such as fine, cohesive, or powdery particulate materials from a low pressure system to a high pressure system. There is provided in a preferred embodiment a process and apparatus of pressurizing and feeding carbon black fluff to a polymerization reactor, particularly a gas phase fluidized polymerization reactor to provide for a close-coupling of a carbon black reactor to a polymerization reactor.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: June 9, 1998
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Duan-Fan Wang, Robert Lorenz Boysen, Leonard Sebastian Scarola, Gary Harry Williams
  • Patent number: 5763543
    Abstract: The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process for polymerizing monomer(s). The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s), alone or in combination, in the presence of a metallocene catalyst system in a fluidized bed reactor, preferably operating in a condensed mode.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: June 9, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Michael Elroy Muhle, Gary Thomas Renola, Agapios Kyriacos Agapiou, Dwayne Lee Litteer, John Robert Griffin
  • Patent number: 5756627
    Abstract: The present invention relates to high molecular weight homopolymers and copolymers of ethene, which homopolymer or copolymer is obtained by polymerizing the monomer(s) at a temperature of from 70.degree. to 150.degree. C. and under a pressure of from 2 to 150 bar in contact witha chromium trioxide catalyst,(1) loading a support based on silicon dioxide with(2) either chromium trioxide or a chromium compound capable of being converted to chromium trioxide under the conditions of stage (3) below and then(3) heating the resulting intermediate in a gas stream containing oxygen,the support (1) being a special silica xerogel obtained by extracting not more than 30% of the water from a silica hydrogel by means of an alkanol, an alkanone or a mixture thereof followed by drying, comminution and fractional screening.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: May 26, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Gropper, Guido Funk, Erich Kolk, Dieter Oeder
  • Patent number: 5756602
    Abstract: A method for controlling reaction temperature for a reaction vessel having a flow channel for a heat transfer medium for heating or cooling or both when vinyl chloride-based monomer is polymerized in an aqueous medium, which entails employing two or more independent flow channels and feeding two or more coolants having different temperatures to the independent flow channels to thereby cool the reaction vessel.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: May 26, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Chi-Yai Hui, Hirofumi Inokuchi, Makoto Uramoto
  • Patent number: 5756659
    Abstract: A method of improving the oxidative thermal stability of ethylene polymers is disclosed. The method comprises removing residual unreacted monomer(s), solvent and thermally unstable species from the molten polymer. The resulting polymer is characterized by having an oxidative exotherm of not more than about 50 percent of the original polymer, as measured by differential scanning calorimetry.
    Type: Grant
    Filed: October 21, 1994
    Date of Patent: May 26, 1998
    Assignee: The Dow Chemical Company
    Inventors: Morgan M. Hughes, Michael E. Rowland, Chad A. Strait
  • Patent number: 5755983
    Abstract: A mold and divider assembly for creating a solid surface countertop having an exterior edge according to different shapes and sizes. The mold includes a planar shaped surface which is bounded by a polygonal shaped body, at least one side of which has a raised and inwardly contoured mold defining edge. A first elongated dividing member equals a length of a first selected side of the mold and is placeable upon the planar surface so as to be movable in directions towards and away from the first selected side. A second elongated dividing member extends between the first dividing member and a second selected side of the mold so that the dividing members define in combination a subset area of the mold for receiving a resinous material pour. The second dividing member may be providing in differing lengths as a kit for producing an assortment of countertops according to differing dimensions. The mold may further be provided in a generally L-shape or rectangular shape.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: May 26, 1998
    Assignee: Talon Surfaces, LLC
    Inventor: Robert Bordener