Patents by Inventor Paul R. Cassimus

Paul R. Cassimus 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).

  • Metal injection molding for stethoscope chestpiece
    Patent number: 11864943
    Abstract: The invention relates to a stethoscope comprising a stethoscope chestpiece comprising a body member having a bottom surface and an ejector mark disposed on the bottom surface. The stethoscope chestpiece has a weight of at least 50 g, a surface roughness (Ra) no greater than 1.6 microns in an unpolished state, and reflectivity (% R) of at least 60% in an unpolished state. The stethoscope chestpiece can be produced by injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body, debinding a portion of binder material from green molded body forming a brown molded body without reducing the temperature by more than 80° C., and sintering the brown molded body to form the stethoscope chestpiece.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: January 9, 2024
    Assignee: 3M Innovative Properties Company
    Inventors: Martin B. Kays, Paul R. Cassimus, Brandon J. Storhaug
  • METAL INJECTION MOLDING FOR STETHOSCOPE CHESTPIECE
    Publication number: 20210369233
    Abstract: The invention relates to a stethoscope comprising a stethoscope chestpiece comprising a body member having a bottom surface and an ejector mark disposed on the bottom surface. The stethoscope chestpiece has a weight of at least 50 g, a surface roughness (Ra) no greater than 1.6 microns in an unpolished state, and reflectivity (% R) of at least 60% in an unpolished state. The stethoscope chestpiece can be produced by injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body, debinding a portion of binder material from green molded body forming a brown molded body without reducing the temperature by more than 80° C., and sintering the brown molded body to form the stethoscope chestpiece.
    Type: Application
    Filed: October 2, 2019
    Publication date: December 2, 2021
    Inventors: Martin B. Kays, Paul R. Cassimus, Brandon J. Storhaug