Patents Assigned to Nova
  • Catalyst deactivation
    Patent number: 6180730
    Abstract: A particulate deactivator is used to pacify halogen-containing catalyst residues from a medium pressure solution polymerization process. The deactivator is added post-reactor preferably in the form of a suspension. The particulate deactivator may also be used in conjunction with a secondary, soluble deactivator.
    Type: Grant
    Filed: December 12, 1998
    Date of Patent: January 30, 2001
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Fazle Sibtain, Antonio Pietro Nicola, Stephen John Brown, Linda Jean Santry
  • Monitoring apparatus and method particularly useful in photolithographically processing substrates
    Patent number: 6166801
    Abstract: Apparatus for processing substrates according to a predetermined photolithography process includes a loading station in which the substrates are loaded, a coating station in which the substrates are coated with a photoresist material, an exposing station in which the photoresist coating is exposed to light through a mask having a predetermined pattern to produce a latent image of the mask on the photoresist coating, a developing station in which the latent image is developed, an unloading station in which the substrates are unloaded and a monitoring station for monitoring the substrates with respect to predetermined parameters of said photolithography process before reaching the unloading station.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: December 26, 2000
    Assignee: Nova Measuring Instruments, Ltd.
    Inventors: Giora Dishon, Moshe Finarov, Yoel Cohen, Zvi Nirel
  • Tetrafunctional initiator
    Patent number: 6166099
    Abstract: The melt of polyvinyl aromatic polymers comprising from 10 to 45 weight % of star branched polymer prepared using a combination of thermal and tetra functional peroxide initiation has an improved melt strength permitting better foam formation for extrusion foam blown with conventional blowing agents and inert gases including CO.sub.2.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: December 26, 2000
    Assignee: Nova Chemicals Inc
    Inventor: Steven M. Krupinski
  • Process for the preparation of polymer particles
    Patent number: 6160027
    Abstract: It is desirable to reduce the amount of volatile organic blowing agent in expandable polystyrene. This may be accomplished by partially polymerizing a mass of styrene and incorporating therein water together with an emulsifier. The partially polymerized mass is then polymerized to a high conversion using conventional suspension techniques. The polymer beads containing water which acts as a blowing agent are recovered.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: December 12, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Jeroen Joost Crevecoeur, Eric Wilhelmus Johannes Frederik Neijman, Laurentius Nicolaas Ida Hubertus Nelissen, Johannes Maria Zijderveld
  • Compatibilizer and laminates containing said compatibilizer
    Patent number: 6153307
    Abstract: The present invention relates to compatibilizers useful to laminate a layer of a vinyl aromatic polymer such as polystyrene and a polyester such as PET. The compatibilizer comprises a mixture comprising 5-95 weight % of a polyester, 95-5 weight % of an impact modified polymer of a vinyl aromatic monomer such as high impact polystyrene (HIPS) and from 5 to 20 weight % of a hydrogenated block polymer of a vinyl aromatic monomer and a conjugated diolefin sometimes called SEBS.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: November 28, 2000
    Assignee: Nova Chemicals Inc.
    Inventor: Beth Ann Baran
  • Liner sleeve for monitor viewing
    Patent number: 6152046
    Abstract: Apparatus and method are provided for preparing a viewing aperture in the top deck of a work station. The aperture when formed is provided with a liner sleeve adjacent to its perimeter. The outside face of the liner sleeve engages the edge wall of the aperture and the inside face of the liner sleeve supports rim portions of a transparent panel that is inset across the aperture. Various cross-sectional profiles for the aperture edge wall and the opposing faces of the liner sleeve can be used. The structures provides a reliable procedure for making an accurately sized aperture for monitor viewing in a deck.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: November 28, 2000
    Assignee: Nova Solutions, Inc.
    Inventors: Edward C. Schairbaum, John N. Lechman
  • Beam-type office furniture system and modules
    Patent number: 6152048
    Abstract: A work station suitable for mounting electrical, communication and computer equipment has a hollow support beam capable of supporting work surfaces and equipment on one side of the beam. Legs mount the beam in a horizontal position above a floor. Support brackets are detachably connected to a side of the beam and work surface members are mounted on these brackets. A support wall is detachably mounted on top of the beam and this wall has rigid metal side panels with rails for attaching shelving and other devices. Each support bracket has an arm supporting section extending perpendicular to the length of the bracket and an upwardly and forwardly extending front section connected to the forward position. The work surface members are connected to this front section.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: November 28, 2000
    Assignee: Nova-Link Limited
    Inventor: Antonius A. Vander Park
  • Process for the preparation of polymer particles
    Patent number: 6153658
    Abstract: A process for the preparation of expandable polymer particles containing a polymer of a vinylarene monomer and a foaming agent, which process comprises:1) polymerizing, by suspension polymerization, 100 parts by weight of a vinylarene monomer, in the presence of 1 to 20 parts by weight of a radical initiator having a half life of 1 hour in benzene at 70 to 110.degree. C., until at least 60% of the vinylarene monomer is polymerized;400 to 4,900 parts by weight additional vinylarene monomer as well as 0.05 to 1% wt, based on the amount of vinylarene monomer added in step 2, of a radical initiator having a half life of 1 hour in benzene at 70 to 110.degree. C. and polymerizing to completion, in which process the blowing agent can be added before, during or after the polymerization process.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: November 28, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Rakesh Jaysinh Paleja, Dominique Paul Vliers, Maria Johanna Willems
  • Roller bearing
    Patent number: 6149312
    Abstract: A roller bearing comprising an inner and an outer ring in concentrical arrangement, a series of roller elements being arranged in the space between said rings and being in contact with raceways provided in said rings. The bearing is characterized in that said raceways are provided with parallel grooves, each one of said grooves being arranged in the plane of rotation of said rings and extending along the entire envelope surface, and in mutual correspondence to said inner and outer rings and being arranged for mating interaction with protruding flanges of said roller elements corresponding to said grooves, said protruding flanges extending along the entire envelope surface of said roller elements.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: November 21, 2000
    Assignee: SKF Nova AB
    Inventors: Clair Druet, Vello Klaassen, Filip Rosengren
  • Compound and method for heating a lubricated bearing
    Patent number: 6150305
    Abstract: The present invention includes a lubricated bearing which incorporates a phase convertible compound. The compound absorbs and stores heat generated during operation of the bearing. This absorbs and stored heat is then released upon start-up conditions of the bearing, especially under low temperature conditions. The released heat is used to improve the ability of the lubricant contained within the bearings to reduce friction of the relatively movable parts contained therein.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: November 21, 2000
    Assignee: SKF Nova AB
    Inventor: Filip Rosengren
  • Phosphinimine/heteroatom catalyst component
    Patent number: 6147172
    Abstract: Organometallic complexes having a phosphinimine ligand, a (non-phosphinimine) heteroligand and at least one activatable ligand are catalyst components for olefin polymerization. Preferred polymerization systems are prepared by combining the organometallic complexes with an ionic activator and/or an alumoxane. Preferred catalyst components contain Ti, Zr or Hf and are activated with an ionic activator to provide ethylene polymerization catalysts.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: November 14, 2000
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Stephen John Brown, Xiaoliang Gao, Qinyan Wang, Peter Zoricak, Rupert Edward von Haken Spence, Wei Xu
  • Split aluminum addition process for making catalyst
    Patent number: 6140264
    Abstract: The present invention provides a novel process for preparing a catalyst, preferably free of electron donor, useful in gas phase polymerization of olefins having a broad polydispersity.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: October 31, 2000
    Assignee: Nova Chemicals Ltd.
    Inventors: Mark Kelly, Dusan Jeremic, Victoria Ker, Charles Russell
  • Adjustable monitor support for flat monitors
    Patent number: 6135298
    Abstract: An improved adjustable monitor support assembly is provided that utilizes a plurality of interchangeable side support assemblies and monitor supporting shelf assemblies. Each such shelf assembly is engageable with each pair or side support assemblies. Thus, a particular pair of side support assemblies can be used with either a monitor supporting shelf subassembly structure for a conventional monitor or a monitor supporting shelf subassembly structure for a flat LCD type monitor.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: October 24, 2000
    Assignee: Nova Solutions, Inc.
    Inventor: John N. Lechman
  • Group 8, 9 or 10 olefin copolymerization catalyst
    Patent number: 6133387
    Abstract: Olefin co- or homopolymers having a good molecular weight and short chain branching may be prepared in the presence of a pyridyl bridged bisphosphinimine complex of a Group 8, 9 or 10 metal.
    Type: Grant
    Filed: November 17, 1998
    Date of Patent: October 17, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Wei Xu, Qinyan Wang
  • Low aluminum and magnesium Z-N solution catalysts
    Patent number: 6130300
    Abstract: The present invention provides a Ziegler-Natta catalyst useful in solution processes for the polymerization of olefins having a low amount of aluminum and magnesium. The catalysts of the present invention have a molar ratio of magnesium to the first aluminum component from 4.0:1 to 5.5:1 and molar ratio of magnesium to transition metal from 4.0:1 to 5.5:1.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: October 10, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventor: Isam Jaber
  • Process for the preparation of polymer particles
    Patent number: 6127439
    Abstract: The present invention provides a process for preparing an expandable polymer of a vinyl aromatic monomer and a polar water adsorbing monomer. The monomers are partially polymerized and then suspended in water so that the resulting beads contain from 3 to 40 weight % water which act as the sole or a predominant blowing agent.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: October 3, 2000
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Hugo Angela Albert Berghmans, Igor Chorvath, Peter Kelemen, Eric Wilhelmus Johannes Frederik Neijman, Johannes Maria Zijderveld
  • Optical flow meter integrally mounted to a rigid plate with direct optical access to the interior of a pipe
    Patent number: 6128072
    Abstract: The present invention provides an optical device for the measurement of flow rates of fluid through a pipe. The device broadly comprises a narrow frequency light source, an optical delivery system, a collector for light scattered from particles in the fluid, and a photo detector. In a preferred embodiment, the optical delivery system and the collector are contained within the pipe.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: October 3, 2000
    Assignee: NOVA Gas Transmission Ltd.
    Inventors: Darwin Edward Kiel, Ian David Williamson
  • Olefin polymerization catalyst having a bridged phosphole-heteroatom ligand
    Patent number: 6124487
    Abstract: A new family of metallacycles, which are preferably zirconacycles, is characterized by having a unique halogenated substituent. The metallacycles are useful for the preparation of main group heterocycles, especially two novel families of heterocycles. The first new family of heterocycles preferably contains a halosilyl substituent. A preferred group of the second family of novel heterocycles contains a silyl group having a leaving group bonded thereto. The preferred group of these heterocycles is suitable for preparing novel organometallic complexes having a bridged bidentate heterocyclic ligand. These novel organometallic complexes may be used as catalyst components in olefin polymerization. The subject catalyst components are particularly well suited for use in the medium pressure solution process to prepare linear low density polyethylene.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: September 26, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Rupert Edward von Haken Spence, Xiaoliang Gao, Linda Koch, Stephen John Brown, Daryll G. Harrison
  • Installation for in situ monitoring the quality of habitat of aquatic organisms
    Patent number: 6119630
    Abstract: An installation for in situ monitoring the quality of a habitat of aquatic organisms with minimal disturbance to the aquatic organisms. In a first aspect of the present invention, the monitoring installation uses invertebrate sentinel species such as mussels, clams, oysters and scallops. The monitoring installation comprises broadly, a buoy; a mooring and a monitoring apparatus comprising; a framework having an upper end connected to the buoy and a lower end connected to the mooring. There is also provided a camera attached to the framework. The camera is adapted for underwater operation and has image data generating and transmitting capabilities for transmitting a number of images to a remote receiver. A support structure is detachably mounted to the framework and has rotary retainers for movably supporting one or more socks of mollusks in front of the camera.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: September 19, 2000
    Assignee: 3042015 Nova Scotia Limited
    Inventors: Ulrich Lobsiger, Joan L. Manuel
  • Modular rectangular classroom desk
    Patent number: D437506
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: February 13, 2001
    Assignee: Nova Solutions, Inc.
    Inventor: John N. Lechman