METHOD OF MAKING INVESTMENT SHELL MOLDS FOR THE HIGH INTEGRITY PRECISION CASTING OF REACTIVE AND REFRACTORY METALS

• US 3,422,880 A
• Filed: 10/24/1966
• Issued: 01/21/1969
• Est. Priority Date: 10/24/1966
• Status: Expired due to Term

• Current Assignee: Selmet, Inc. (Consolidated Precision Products Corp.)
• Original Assignee: Clifford A. Brown, Robert A Brown
• Inventors: Brown, Robert A., Brown, Clifford A.
• Application Number:
  US04/589,022
• Time in Patent Office: 820 Days
• US Class Current: 164/517
• CPC Class Codes: B22C 1/165 in the manufacture of multilayered shell moulds
• CPC Class Codes: B22C 1/18 of inorganic agents B22C1/162 takes precedence
• CPC Class Codes: B22C 1/205 of organic silicon or metal compounds, other organometallic compounds
• CPC Class Codes: B22C 3/00 Selection of compositions for coating the surfaces of moulds, cores, or patterns
• CPC Class Codes: B22C 9/04 Use of lost patterns

Claims

1. THE METHOD OF MAKING AN INVESTMENT SHELL MOLD WHICH COMPRISES:

(A) DIP COATING A DISPOSABLE PATTERN IN A LIQUID SUSPENSION OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF FINELY DIVIDED METALLIC COLUMBIUM, MOLYBDENUM, TANTALUM AND TUNGSTEN AND A BINDER THEREFOR COM-