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

Claim 12:
13. A method of making a metal stethoscope comprising:
injection molding, extruding, or pressing a metallic thermoplastic composition into a mould forming a green molded body,
continuously debinding a portion of binder material from green molded body at a temperature in a range of 100 to 200° C. over a period from 4 to 12 hours in a nitrogen-comprising atmosphere forming a brown molded body, wherein the temperature is maintained within ±10° C. during the period;
sintering the brown molded body at a temperature in a range from 1100 to 1500° C. over a period of from 6 to 10 hours in a hydrogen or argon atmosphere to form the stethoscope chestpiece.