3781156

Information

• Patent Grant
• 3781156

• References
• Source

• Patent Number

  3,781,156

• Date Filed

  Not available

• Date Issued

  Tuesday, December 25, 1973
  51 years ago

• CPC

  • B28B1/04 - by tamping or ramming
  • B28B3/022 - combined with vibrating or jolting
  • B28B3/10 - each charge of material being compressed against previously formed body
  • B28B7/168 - for holders or similar hollow articles
  • B28B7/18 - the holes passing completely through the article
  • B28B7/183 - for building blocks or similar block-shaped objects
  • B28B7/28 - Cores Mandrels

• US Classifications

  • 425 - Plastic article or earthenware shaping or treating: apparatus