Patents by Inventor Elmer Blackwell

Elmer Blackwell 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: 5607737
    Abstract: A stack of pre-cut sheets and a dispenser for those sheets are disclosed. The sheets include different adhesion levels to afford individual dispensing of the sheets.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: March 4, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Elmer Blackwell, John J. Emmel, Harry A. Loder
  • Patent number: 5518144
    Abstract: A dispenser package including a stack of flexible sheets adhered together by layers of pressure sensitive adhesive with first and second ends of successive sheets in the stack adjacent; and an enclosure in which the stack of sheets is positioned having top wall portions with spaced opposed surfaces that define a wide slot. The first end portion of the uppermost sheet on the stack projects through the slot and rests against the adjacent first abutment surface.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: May 21, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Bruce E. Samuelson, William L. Hansen, James R. Emmerling, Elmer Blackwell, James M. Peck, Jane H. Machacek, Jerome E. Strand, Joseph P. Callahan, Jr., Wayne K. Darvell, Michael S. Groess, Kenneth F. Knoll, John T. Rueb
  • Patent number: 5401547
    Abstract: A stack of pre-cut sheets and a dispenser for those sheets are disclosed. The sheets include different adhesion levels to afford individual dispensing of the sheets.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: March 28, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Elmer Blackwell, Bruce E. Samuelson, John J. Emmel, Harry A. Loder
  • Patent number: 5299712
    Abstract: A dispenser for flexible sheets from a stack of adhesive coated sheets disposed one on top of another. The dispenser comprises a first housing portion including a bottom wall, end walls, side walls and a first top wall portion; and a second housing portion comprising a second top wall portion mounted on the first housing portion for movement between a normal position where the top wall portions define an outlet opening for the sheets between adjacent ends, and an open position with the second top wall portion spaced from the first wall portion to afford inserting a stack of sheets into the cavity. The dispenser includes attaching means adapted for releasably attaching the dispenser to several different retaining means including a strap by which the dispenser can be secured on a user's hand or wrist; a support member adapted to be held between user's fingers; a weighted base; or a base adapted to be attached to a surface by various means such as adhesive, suction cups or magnetic material.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: April 5, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Casey L. Carlson, Thomas L. Connolly, Elmer Blackwell, Bruce E. Samuelson, Gerald E. Mueller
  • Patent number: 5086946
    Abstract: A stack of individual pre-cut sheets and a dispenser for those sheets are disclosed. The dispenser affords reciprocating movement of the stack within the dispenser to afford individual dispensing of the sheets. Optionally, the dispenser may be mounted on the wrist of a user to afford convenient dispensing.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: February 11, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Elmer Blackwell, Bruce E. Samuelson, John J. Emmel, Harry A. Loder
  • Patent number: 5073457
    Abstract: Repositionable adhesives which display surprising latent permanent adhesive properties are described herein. These adhesives are comprised of acrylic pressure sensitive resins. These pressure-sensitive adhesive resins can be either solvent based or water based. In the case of a solvent-based adhesive system, paraffin wax is used, while in the water-based systems, latex emulsions of polyethylene are preferred.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: December 17, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Elmer Blackwell
  • Patent number: D348484
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: July 5, 1994
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Elmer Blackwell, Bruce E. Samuelson