Patents Assigned to Thoratec Laboratories Corp.
  • Hydroxyl-functional disiloxanes and polysiloxane oligomers
    Patent number: 4689383
    Abstract: Hydroxyl-functional disiloxanes and hydroxyl-functional polysiloxane oligomers are provided which contain hydroxyl groups bound to the silicon via Si--C bonds. These compounds may be crosslinked to form polysiloxane networks having improved mechanical strength or reacted to form linear, siloxane containing block copolymers.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: August 25, 1987
    Assignee: Thoratec Laboratories Corp.
    Inventors: Judy S. Riffle, Iskender Yilgor
  • Moisture vapor permeable materials
    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
  • Polymer systems suitable for blood-contacting surfaces of a biomedical device, and methods for forming
    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.
  • Polysiloxane-polylactone block copolymers
    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
  • Polysiloxane/poly(oxazoline) copolymers
    Patent number: 4659777
    Abstract: Novel block copolymers are provided, comprising poly(oxazoline) blocks and polysiloxane blocks. Novel polysiloxane intermediates for preparing such block copolymers are also provided which contain benzyl halide terminal groups. The block copolymers are useful as surface-modifying additives for base polymers.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: April 21, 1987
    Assignee: Thoratec Laboratories Corp.
    Inventors: Judy S. Riffle, Iskender Yilgor