Patents by Inventor Jim A. Davidson

Jim A. Davidson 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).

  • Publication number: 20080021547
    Abstract: A prosthetic heart valve sewing ring that is highly compatible with surrounding tissue by being made of a material that has physical properties similar to the surrounding tissue. The present invention provides an “iso-elastic” sewing ring, or one having an elasticity similar to that of soft tissue. Exemplary materials include silicone, polyurethane, polyurethane copolymers, rubber, and other hemocompatible and biocompatible thermoplastic elastomers. The material may have an elastic modulus between about 100 to 5000, up to 10,000 psi, and more preferably between 200 to 2000 psi, a tensile strength between about 5000 and 60,000 psi, and more particularly between about 5000 to 50,000 psi, and a tensile elongation between about 100 to 3000%, preferably between about 100 to 1000%. The sewing ring may be a fiber mat, monolithic, or may have a reinforcing fiber embedded therein to help prevent suture pull-out.
    Type: Application
    Filed: July 24, 2006
    Publication date: January 24, 2008
    Inventor: Jim A. Davidson