Patents by Inventor Virginia Ruth Simkins

Virginia Ruth Simkins 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).

  • Auxetic filamentary materials
    Patent number: 7247265
    Abstract: An auxetic material, which has a negative Poisson ratio so that it has the property of expanding or contracting transversely to a direction in which it is extended or compressed, is made in filamentary or fibrous form. A suitable process involves cohering and extruding heated polymer powder so that the cohesion and extrusion is effected with spinning to produce auxetic filaments. Typically the powder is heated to a temperature sufficient to allow some degree of surface melting yet not high enough to enable bulk melting.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: July 24, 2007
    Assignee: Auxetic Technologies Ltd.
    Inventors: Kim Lesley Alderson, Virginia Ruth Simkins
  • Auxetic materials
    Patent number: 6878320
    Abstract: An auxetic polymeric material is manufactured in a filamentary or fibrous form. The auxetic polymeric material has a negative Poisson ratio so that it has the property of expanding or contracting transversely to a direction in which it is extended or compressed. The process for forming the material involves cohering and extruding heated polymer powder so that the cohesion and extrusion is effected with spinning to produce auxetic filaments. Typically, the power is heated to a temperature sufficient to allow some degree of surface melting yet not high enough to enable bulk melting.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: April 12, 2005
    Assignee: The University of Bolton, higher education corporation a UK corporation
    Inventors: Kim Lesley Alderson, Virginia Ruth Simkins