Patents by Inventor Clifford N. MacDonald

Clifford N. MacDonald 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).

  • Reinforcement composition and method thereof
    Patent number: 8142889
    Abstract: The present invention relates generally to a reinforcement composition and a method of reinforcing an asphalt cement concrete composition. The reinforcement composition includes a core and an outer container. The core includes a plurality of fibers, and the outer container includes a polyolefin selected from the group consisting of polyethylene, polypropylene, and mixtures thereof.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 27, 2012
    Assignee: Forta Corporation
    Inventors: Clifford N. MacDonald, Tracy H. Lang
  • Reinforcement composition and method thereof
    Patent number: 8114514
    Abstract: The present invention relates generally to a reinforcement composition and a method of reinforcing an asphalt cement concrete composition. The reinforcement composition includes a core and an outer container. The core includes a plurality of fibers, and the outer container includes a polyolefin selected from the group consisting of polyethylene, polypropylene, and mixtures thereof.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: February 14, 2012
    Assignee: Forta Corporation
    Inventors: Clifford N. MacDonald, Tracy H. Lang
  • Reinforcement Composition and Method Thereof
    Publication number: 20110117303
    Abstract: The present invention relates generally to a reinforcement composition and a method of reinforcing an asphalt cement concrete composition. The reinforcement composition includes a core and an outer container. The core includes a plurality of fibers, and the outer container includes a polyolefin selected from the group consisting of polyethylene, polypropylene, and mixtures thereof.
    Type: Application
    Filed: January 27, 2011
    Publication date: May 19, 2011
    Applicant: FORTA CORPORATION
    Inventors: Clifford N. MacDonald, Tracy H. Lang
  • Varied length fibers in a brittle material
    Patent number: 7727326
    Abstract: Concrete and mortar composites can be made with two or more sizes of fibers therein. The different sized fibers can be used to adjust the toughness and reliability of the composite material. The different sized fibers can also be used to increase the deflection of concrete or mortar compositions. The variable length of fibers provide for smaller fibers to exist in corners for more strength in smaller spaces. Different mixes of sizes of fibers can also adjust the stiffness of a concrete or mortar composite material. The fibers can be made from a variety of materials, lengths, shapes, aspect ratios or diameters. The fibers can make up variable portions of the composition. Mixing different aspect ratios of fibers together can be used to prevent clumping or balling of the fibers. Mixing of different modulus of elasticity fibers in different ratios can add to the toughness and strength of the composite.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: June 1, 2010
    Inventors: Julian P. Trangsrud, Clifford N. MacDonald
  • Toughened cementitious composites
    Patent number: 7192643
    Abstract: The present invention relates to the field of toughening and reinforcing brittle matrix materials, and more specifically to the structural fibers made from an oriented film, which enhance the toughness of matrix materials such as concrete, cement, and other cementitious products.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: March 20, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Mario A. Perez, James F. Sanders, Robert S. Kody, Troy K. Ista, Clifford N. MacDonald
  • Toughened cementitious composites
    Publication number: 20030044592
    Abstract: The present invention relates to the field of toughening and reinforcing brittle matrix materials, and more specifically to the structural fibers made from an oriented film, which enhance the toughness of matrix materials such as concrete, cement, and other cementitious products.
    Type: Application
    Filed: September 10, 2001
    Publication date: March 6, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Mario A. Perez, James F. Sanders, Robert S. Kody, Troy K. Ista, Clifford N. MacDonald
  • Reinforcing elements for castable composition
    Patent number: 5897928
    Abstract: Methods and articles for reinforcing castable compositions through the use of reinforcing elements maintained in a close-packed alignment in a dispersible containment means.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: April 27, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James F. Sanders, Larry D. Rich, Clifford N. MacDonald, L. Max Hurlocker
  • Reinforcing elements for castable compositions
    Patent number: 5807458
    Abstract: Methods and articles for reinforcing castable compositions through the use of reinforcing elements maintained in a close-packed alignment in a dispersible containment means.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: September 15, 1998
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: James F. Sanders, Larry D. Rich, Clifford N. MacDonald, L. Max Hurlocker