3891022

Information

• Patent Grant
• 3891022

• References
• Source

• Patent Number

  3,891,022

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1975
  50 years ago

• CPC

  • B22C1/181 - Cements, oxides or clays
  • B22C7/005 - Adjustable, sectional, expandable or flexible patterns
  • B22C9/00 - Moulds or cores Moulding processes
  • Y10S425/014 - Expansible and collapsible

• US Classifications

  • 164 - Metal founding
  • 249 - Static molds
  • 425 - Plastic article or earthenware shaping or treating: apparatus