Patents by Inventor Dennis G. Welygan

Dennis G. Welygan 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: 5571296
    Abstract: A method of making a composite abrasive filament, said filament including at least one preformed core at least partially coated with a hardened, abrasive-filled thermoplastic elastomer, and exhibiting increased abrading life over previously known abrasive filaments. Also disclosed are methods of using such filaments in article form to abrade a variety of workpieces.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: November 5, 1996
    Assignee: Minnesota Mining And Manufacturing Company
    Inventors: Loren L. Barber, Jr., Dennis G. Welygan, Richard M. Pihl
  • Patent number: 5518794
    Abstract: A composite abrasive filament, including at least one preformed core at least partially coated with a hardened, abrasive-filled thermoplastic elastomer, exhibits increased abrading life over previously known abrasive filaments. Also disclosed are methods of making such filaments and using such filaments in article form to abrade a variety of workpieces.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 21, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Loren L. Barber, Jr., Dennis G. Welygan, Richard M. Pihl
  • Patent number: 5491025
    Abstract: An abrasive filament, including a thermoplastic elastomer having abrasive particles dispersed and adhered therein, exhibits improved life over previously known abrasive-filled polymeric filaments. Methods of making abrasive filaments of the invention, articles including the abrasive filaments, and methods of abrading surfaces using the abrasive articles of the invention are also described.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: February 13, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard M. Pihl, Duane J. Hayes, Loren L. Barber, Jr., Dennis G. Welygan, R. Eugene Hardwick, Ronald O. Zemke, deceased
  • Patent number: 5460883
    Abstract: A composite abrasive filament, including at least one preformed core at least partially coated with a hardened, abrasive-filled thermoplastic elastomer, exhibits increased abrading life over previously known abrasive filaments. Also disclosed are methods of making such filaments and using such filaments in article form to abrade a variety of workpieces.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: October 24, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Loren L. Barber, Jr., Dennis G. Welygan, Richard M. Pihl
  • Patent number: 5443906
    Abstract: An abrasive filament, including a thermoplastic elastomer having abrasive particles dispersed and adhered therein, exhibits improved life over previously known abrasive-filled polymeric filaments. Methods of making abrasive filaments of the invention, articles including the abrasive filaments, and methods of abrading surfaces using the abrasive articles of the invention are also described.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: August 22, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard M. Pihl, Duane J. Hayes, Loren L. Barber, Jr., Dennis G. Welygan, R. Eugene Hardwick, Ronald O. Zembke, deceased
  • Patent number: 5427595
    Abstract: An abrasive filament, including a thermoplastic elastomer having abrasive particles dispersed and adhered therein, exhibits improved life over previously known abrasive-filled polymeric filaments. Methods of making abrasive filaments of the invention, articles including the abrasive filaments, and methods of abrading surfaces using the abrasive articles of the invention are also described.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: June 27, 1995
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Richard M. Pihl, Duane J. Hayes, Loren L. Barber, Jr., Dennis G. Welygan, R. Eugene Hardwick, Ronald O. Zemke, deceased
  • Patent number: 5011642
    Abstract: An extruded article is provided having a base element, and rib element attached to the base element along its entire length. The rib element is narrower at its attachment end than at its free end, and is undulated. The article is formed by extruding an extrudable plastic mass having a conformable state and a nonconformable state. The extrusion rate of the free end of the rib element is sufficiently faster than that of the base element causing the free end of the rib element to undulate without distortion as the structure is extruded. The plastic mass is then converted to the nonconformable state while maintaining the undulation in the free end of the rib element.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: April 30, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Ronald O. Zemke, Walter W. Pawlikowski, Jr.
  • Patent number: 4828902
    Abstract: An extruded article is provided comprising a base element, and at least one rib element attached to the base element along its entire length. The rib element is narrower at its attachment end than at its free end, and is undulated.The article is formed by extruding an extrudable plastic mass having a conformable state and a nonconformable state. The extrusion rate of the free end of the rib element is sufficiently faster than that of the base element. The free end of the rib element will therefore undulate as the structure is extruded. The free end of the rib element is permitted to undulate without distortion of the base element while the plastic mass is in the conformable state. The plastic mass is then converted to the nonconformable state while maintaining the undulation in the free end of the rib element.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: May 9, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Zemke, Ronald O., Walter W. Pawlikowski, Jr.
  • Patent number: 4732770
    Abstract: An article is provided having a plurality of straight spaced parallel extruded elements separated by a regularly undulated extruded element having an aspect ratio of at least about two, with undulations having opposed apexes on either side thereof, with apexes on one side of the undulated element being bonded to one of the parallel extruded elements and the apexes on the other side of the undulated element being bonded to the other of said parallel extruded elements.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: March 22, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Ronald O. Zemke
  • Patent number: 4634485
    Abstract: An article is provided comprising a plurality of straight spaced parallel extruded elements separated by a regularly undulated extruded element having an aspect ratio of at least about two, with undulations having opposed apexes on either side thereof, with apexes on one side of the undulated element being bonded to one of the parallel extruded elements and the apexes on the other side of the undulated element being bonded to the other of said parallel extruded elements.
    Type: Grant
    Filed: August 23, 1985
    Date of Patent: January 6, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Ronald O. Zemke
  • Patent number: 4631215
    Abstract: An article is provided comprising a plurality of straight spaced parallel extruded elements separated by a regularly undulated extruded element having an aspect ratio of at least about two, with undulations having opposed apexes on either side thereof, with apexes on one side of the undulated element being bonded to one of the parallel extruded elements and the apexes on the other side of the undulated element being bonded to the other of said parallel extruded elements.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: December 23, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Ronald O. Zemke