Patents Represented by Attorney, Agent or Law Firm Scott R. Pribnow
  • Patent number: 6083316
    Abstract: An adhesive-free, dry, free-flowing powder composition suitable for use in surface defect detection, where the powder composition comprises a physical mixture of particles of a colorant and particles of an extender, which mixture includes particles of colorant and particles of extender each having a particle size of less than 100 .mu.m. The powder compositions of the invention provide a simple, effective guide coat which readily highlights surface imperfections, such as scratches, orange peel effect and dry over-spray without the need for solvents. Also, there are disclosed methods of using such a powder composition to detect surface imperfections, an apparatus for applying same, a device for refilling such applying apparatus, and coated surfaces formed thereby.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: July 4, 2000
    Assignee: 3M Innovative Properties Company
    Inventor: David R. Bastow
  • Patent number: 6076248
    Abstract: The present invention provides a master tool and method for making a master tool. The master tool includes a plurality of precise three-dimensional shapes upraised from the surface of the master tool. Each of the precise shapes is defined by a distinct and discernible boundary including specific dimensions, wherein not all said three-dimensional shapes are identical. The master tool of the present invention can be used to form a production tool containing a plurality of precise three-dimensional-shaped cavities. The production tool can be used in the manufacture of abrasive articles to shape an abrasive slurry into an array of precise three dimensional-shaped abrasive composites.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: June 20, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Timothy L. Hoopman, Nelson D. Sewall
  • Patent number: 6042918
    Abstract: Caustic- and acid-resistant nonwoven articles useful for surface conditioning of sheeting, especially metal sheeting, and a method for the manufacture of such articles are described. The articles comprise a plurality of compacted, stacked nonwoven web elements, the web elements each comprising entangled fibers bonded together at points of mutual contact by an adhesive binder, the binder comprising a terpolymer of acrylonitrile butadiene styrene. The nonwoven articles can be configured into any of a variety of convenient and useful shapes, such as roll shapes and slab or bar shapes.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: March 28, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Marian R. Appelt, Loren L. Barber, Jr., Lacy Max Hurlocker, Ronald E. Lux, John B. Young
  • Patent number: 6039775
    Abstract: An abrasive article is provided which includes a peripheral surface formed comprising a grinding aid. The grinding aid is formed from a mixture including an acid and at least one of an inorganic metal phosphate salt or an inorganic metal sulfate salt. The acid is preferably selected so that the mixture forms a film. The abrasive article preferably has sharp abrasive particles. The inventive abrasive article improves grinding efficacy, particularly in titanium grinding processes, as compared to abrasive articles that are substantially devoid of a grinding aid of the present invention. Also provided is a method for making an abrasive article and a method of abrading a surface with an abrasive article.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: March 21, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Kwok-Lun Ho, Robert A. Follensbee, Walter L. Harmer, Mary L. Morris
  • Patent number: 5961674
    Abstract: An abrasive article, and methods of making and using same, containing an inorganic metal orthophosphate salt. The abrasive article including a coated abrasive article having a size or supersize coating layer containing an alkali metal or alkaline earth metal orthophosphate salt devoid of hydrogen. The inventive abrasive article reduces the grinding energy required while improving abrading efficiency in some cases.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: October 5, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: John J. Gagliardi, Charles H. Houck
  • Patent number: 5942015
    Abstract: Abrasive slurries, abrasive articles made from the abrasive slurries, and methods for the production of the abrasive articles are disclosed. The abrasive slurries and abrasive articles made therefrom comprise at least two grades of abrasive particles (i.e., a first larger grade, and a second smaller grade). The abrasive grades have a median particle size ratio of about 2, where the median particle size ratio equals the median particle size of the larger grade of abrasive particles divided by the median particle size of any smaller grade of abrasive particles.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: August 24, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Scott R. Culler, Michael V. Mucci