3750272

Information

• Patent Grant
• 3750272

• References
• Source

• Patent Number

  3,750,272

• Date Filed

  Not available

• Date Issued

  Tuesday, August 7, 1973
  51 years ago

• CPC

  • B24B9/142 - for contact lenses
  • B29D11/00932 - Combined cutting and grinding thereof
  • Y10T29/49995 - Shaping one-piece blank by removing material
  • Y10T29/49996 - Successive distinct removal operations

• US Classifications

  • 029 - Metal working
  • 351 - Optics: eye examining, vision testing and correcting
  • 451 - Abrading