Patents Represented by Attorney, Agent or Law Firm David Bennett
  • Production of alpha alumina
    Patent number: 5641469
    Abstract: Dry milling an alpha alumina precursor produces direct conversion to alpha alumina at room temperature.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: June 24, 1997
    Assignee: Norton Company
    Inventors: Ajay K. Garg, Edward Lilley
  • Fining abrasive materials
    Patent number: 5637386
    Abstract: A coated abrasive suitable for fining operations on contoured surfaces is obtained by depositing an abrasive/bond mixture in a discontinuous pattern on the surface of a backing that is stretchable in such a fashion that the finished product remains stretchable.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: June 10, 1997
    Assignee: Norton Company
    Inventor: Dhiraj H. Darjee
  • Surface improved tower packing
    Patent number: 5635035
    Abstract: Etching the surfaces of a metal tower packing improves their wettability and therefore their efficiency in mass transfer applications.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: June 3, 1997
    Assignee: Norton Chemical Process Products Corporation
    Inventor: T. Daniel Koshy
  • Waterproof paper-backed coated abrasives
    Patent number: 5624471
    Abstract: Waterproof coated abrasive paper made using a maker and/or size coat comprising a radiation-curable binder that is hydrophobic when polymerized.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: April 29, 1997
    Assignee: Norton Company
    Inventors: Anthony C. Gaeta, Gwo S. Swei
  • Fractionation trays
    Patent number: 5618473
    Abstract: A fractionating column is provided which has perforated fractionating trays and downcomers allowing liquid to flow from one tray to the tray immediately below, said downcomers being provided with radial outflow ports directing downflowing liquids towards the column wall rather than onto the surface of the tray directly below the downcomer. This permits at least a portion of the under-downcomer area to be perforated thereby increasing the capacity of the tray for vapor/liquid contact and ensuring that weeping of the liquid through the perforations is avoided without need for an increase in vapor pressure.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: April 8, 1997
    Assignee: Norton Chemical Process Products Corporation
    Inventors: John R. Sauter, Richard P. Hauser, John Harris
  • Distributor trough junctions
    Patent number: 5597655
    Abstract: A liquid distribution system with improved resistance to leaking is provided by bolting trough members to sump members using an internal flange formed on the trough members by folding inwards end portions of the sides and bottom of the trough and welding the folded-in end portions.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: January 28, 1997
    Assignee: Norton Chemical Process Products Corporation
    Inventors: Gail W. Hausch, Donald Thames
  • Sol-gel alumina abrasives
    Patent number: 5593468
    Abstract: The use of purified process materials in the production of a seeded sol-gel alumina abrasive results in an abrasive of superior properties.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: January 14, 1997
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corporation
    Inventors: Arup K. Khaund, Ajay K. Garg, Ralph Bauer
  • Curl-resistant coated abrasives
    Patent number: 5582625
    Abstract: A coated abrasive backing material is provided which is suitable for heavy duty grinding applications is provided by a continuous solid resin matrix having dispersed therein an essentially isotropic fibrous web. The invention also provides a coated abrasive based on said backing.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: December 10, 1996
    Assignee: Norton Company
    Inventors: Howard R. Wright, Richard Vogel, Richard Sargood, Gwo S. Swei, Jane L. Cercena
  • Mesh-backed abrasive products
    Patent number: 5578343
    Abstract: A mesh backed coated abrasive product is provided that has a binder coat that can be partially cured by radiation and finally cured at the same time as a size applied over the top of the maker coat. The use of the radiation curable binder permits the elimination of fabric pre-treatment and speeds the production process considerably.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 26, 1996
    Assignee: Norton Company
    Inventors: Anthony C. Gaeta, Gwo S. Swei, Neil W. Durkee
  • Hot metal grinding
    Patent number: 5577956
    Abstract: A coated abrasive suitable for conditioning a freshly cast metal surface comprises a backing having a cyclic elongation at a temperature of 150.degree. C. of less than 3%.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: November 26, 1996
    Assignee: Norton Company
    Inventor: Dhiraj H. Darjee
  • Reclamation of abrasive grain
    Patent number: 5578222
    Abstract: The invention provides a process for recovering abrasive grains from vitreous bonded materials by boiling the material in an aqueous solution of an alkali metal base.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: November 26, 1996
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.
    Inventors: Ronald W. Trischuk, Ajay K. Garg, Arup K. Khaund
  • Washable coated abrasives
    Patent number: 5578097
    Abstract: A washable coated abrasive material comprising a substrate and maker, size and optionally supersize coats and a functionalized polysiloxane modifying the binder of the outermost layer.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: November 26, 1996
    Assignee: Norton Company
    Inventors: Anthony C. Gaeta, Gwo S. Swei
  • Friction coating for film backings
    Patent number: 5573816
    Abstract: A friction promoting layer is provided which comprises a binder and particulate material and is suitable for use with film backed coated abrasives. The binder used is one that shrinks upon drying and curing to ensure that particulates in the layer are not buried in the binder component.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 12, 1996
    Assignee: Norton Company
    Inventors: Anthony C. Gaeta, Gwo S. Swei
  • Dual-cure binder system
    Patent number: 5571297
    Abstract: A coated abrasives having very desirable efficiencies in production is provided by the use of a binder coat which comprises a compound having at least one function that is radiation curable and at least one function that is polymerizable under thermally activated conditions.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 5, 1996
    Assignee: Norton Company
    Inventors: Gwo S. Swei, Anthony C. Gaeta, Wen L. P. Yang, Jane L. Cercena
  • Process for production of alumina/zirconia materials
    Patent number: 5567214
    Abstract: A process is described for the production of alumina/zirconia materials which uses cheap scrap alumina/zirconia/silica material as feedstock along with a reducing agent to lower the final silica content to an acceptable level.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: October 22, 1996
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corporation
    Inventor: Peter J. Ashley
  • Composite abrasive products
    Patent number: 5556438
    Abstract: Composite abrasive wheels having shaped abrasive grits bonded to a fibrous substrate are more effective than their counterparts with irregularly shaped grain, especially at finer grit sizes.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: September 17, 1996
    Assignee: Norton Company
    Inventors: Gary J. Kardys, Robert G. Kelly
  • Dielectric curing
    Patent number: 5542961
    Abstract: Use of dielectric heating to cure a thermosettable resin component of a binder formulation used to secure abrasive particles to a backing in a coated abrasive greatly accelerates the production process.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: August 6, 1996
    Assignee: Norton Company
    Inventors: Gwo S. Swei, Nicolas Avril, Jony Wijaya
  • Kiln car
    Patent number: 5529488
    Abstract: An improved kiln car comprises a car with a load box with a base that can be separated into parts that can be reconfigured to form a discharge and then rotated to reform the base but with the load-bearing side on the underside so as to present a clean side to the next load of green items to be fired and to counter the cumulative effects of distortion as the load bearing base makes repeated passes through the kiln.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: June 25, 1996
    Assignee: Norton Chemical Process Products Corp.
    Inventor: Niels L. Jensen
  • Modified sol-gel alumina
    Patent number: 5527369
    Abstract: Alpha alumina abrasive grits with grain boundaries modified with at least one of yttria and a rare earth metal oxide, and one or more oxides selected from the oxides of magnesium and/or transition elements, perform at enhanced levels if at least the yttria and/or rare earth metal oxide modifiers are present within the body of the grit in concentrations at least as high as their concentrations at the surface of the grit.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: June 18, 1996
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corp.
    Inventor: Ajay K. Garg
  • Tower packing element
    Patent number: D379096
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: May 6, 1997
    Assignee: Norton Chemical Process Products Corporation
    Inventor: Frank D. Moore