Patents by Inventor Robert S. Ward

Robert S. Ward 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: 4686137
    Abstract: Polymeric materials are provided characterized by hard segments and copolymer soft blocks comprising hydrophobic and hydrophilic components. The polymeric materials may be mixed with a base polymer and/or inorganic salts. The polymeric materials and mixtures containing same are characterized by improved moisture vapor transmission rates. The polymeric materials may be formed into films for use as wound dressings, burn dressings, surgical drapes, semipermeable membranes, and coatings for textiles.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: August 11, 1987
    Assignee: Thoratec Laboratories Corp.
    Inventors: Robert S. Ward, Jr., Judy S. Riffle
  • Patent number: 4675361
    Abstract: A polymer admixture is formed from a base polymer and thermoplastic copolymer additive including polar hard segments and polar and nonpolar soft blocks in graft or block copolymer form. The polymer admixture is characterized by increased contact angle hysteresis and is formed into blood and tissue-contacting surfaces of a biomedical device or into textiles. A preferred additive comprises a segmented block copolymer having polydialkylsiloxanes as nonpolar soft blocks, and a polyurethane as hard segments and a polyalkylene oxide as a polar soft block.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: June 23, 1987
    Assignee: Thoratec Laboratories Corp.
    Inventor: Robert S. Ward, Jr.
  • Patent number: 4663413
    Abstract: Novel linear polysiloxane-polylactone block copolymers are useful as surface modifying additives due in part to their miscibility with a wide variety of base polymers. A particularly preferred polysiloxane-polycaprolactone linear blocked copolymer is miscible with nylon and is useful for forming surface modified nylon products.
    Type: Grant
    Filed: January 4, 1985
    Date of Patent: May 5, 1987
    Assignee: Thoratec Laboratories Corp.
    Inventors: Robert S. Ward, Judy S. Riffle
  • Patent number: 4409172
    Abstract: A device for fabricating multi-layer tubing has a reservoir for tubing solution and discharges such solution from an opening in the reservoir bottom. The reservoir is suspended so as to remain level. Extending through the opening is a vertical rod of smaller diameter but itself suspended by a flexible wire so as to remain vertical. Material in the reservoir extrudes as an annulus even in cross-section by passing between the edge of the reservoir opening and the rod. Such extruded material hardens into one layer of the tubing. There is a repetition with a larger reservoir opening and so depositing a larger tube that is dried on and over the first tube. This is repeated as often as desired to get a finished tube of the proper inside and outside diameter.The method is following in succession the steps described above.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: October 11, 1983
    Assignee: Thoratec Laboratories Corporation
    Inventors: Robert S. Ward, Jr., Donald R. Beckham