Patent ID: 11864943
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Materials, metallurgy (Chemistry)
Classification: CPC A  B  G | IPC A  B  G

Claim 0:
1. A stethoscope chestpiece comprising:
a body member having a bottom surface;
an ejector mark disposed on the bottom surface;
wherein the stethoscope chestpiece has a weight of at least 50 g, and 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,
wherein the stethoscope chestpiece has been 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 to form a brown molded body without reducing the temperature by more than 80° C.;
sintering the brown molded body to form the stethoscope chestpiece.