Patents by Inventor Ross R. Muth

Ross R. Muth 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).

  • Process for making a surgical device using two-phase compositions
    Patent number: 4844854
    Abstract: An absorbable, annealed surgical device made from a multi-phase, polymeric composition derived from lactide and glycolide is disclosed. Preferably, the composition has two phases, both phases are continuous, the first phase has about 0 - about 25% m glycolide moieties, the overall composition has up to 45% m glycolide moieties, and the first phase constitutes at least 50% (and preferably not more than about 95%) by weight of the composition. The device has a high distortion temperature, good resistance to hot-wet creep, but yet loses tensile strength in vivo guickly. The composition per se is injection-moldable, can be annealed, and is not brittle.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: July 4, 1989
    Assignee: United States Surgical Corporation
    Inventors: Donald S. Kaplan, Matthew E. Hermes, Ross R. Muth, John J. Kennedy
  • Process of making an absorbable surgical device
    Patent number: 4839130
    Abstract: A process for making an adsorbable, annealed surgical device of a multi-phase, polymeric composition derived from lactide and glycolide. The process includes the preparation of a first polymer having predominantly lactide moieties, followed by the intimate mixing of particles of a second polymer containing a predominant amount of glycolide moieties, thereby forming a two-phase polymeric composition. The polymeric composition is then formed into a surgical device and annealed.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: June 13, 1989
    Assignee: United States Surgical Corporation
    Inventors: Donald S. Kaplan, Matthew E. Hermes, Ross R. Muth, John J. Kennedy
  • Two-phase compositions for absorbable surgical devices
    Patent number: 4744365
    Abstract: An absorbable, annealed surgical device made from a multi-phase, polymeric composition derived from lactide and glycolide is disclosed. Preferably, the composition has two phases, both phases are continuous, the first phase has about 0-about 25% m glycolide moieties, the overall composition has up to 45% m glycolide moieties, and the first phase constitute at least 50% (and preferably not more than about 95%) by weight of the composition. The device has a high distortion temperature, good resistance to hot-wet creep, but yet loses tensile strength in vivo quickly. The composition per se is injection-moldable, can be annealed, and is not brittle.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: May 17, 1988
    Assignee: United States Surgical Corporation
    Inventors: Donald S. Kaplan, Matthew E. Hermes, Ross R. Muth, John J. Kennedy
  • Polymers for injection molding of absorbable surgical devices
    Patent number: 4523591
    Abstract: Absorbable, substantially amorphous surgical fasteners having good in vivo strength-retaining and absorption characteristics may be made of copolymers of lactide and glycolide made from 70-85% m lactide and 15-30% m glycolide provided the inherent viscosity and glass transition temperature of the copolymers have at least certain minimum values.
    Type: Grant
    Filed: October 22, 1982
    Date of Patent: June 18, 1985
    Inventors: Donald S. Kaplan, Ross R. Muth