3542535

Information

• Patent Grant
• 3542535

• References
• Source

• Patent Number

  3,542,535

• Date Filed

  Not available

• Date Issued

  Tuesday, November 24, 1970
  54 years ago

• CPC

  • C03B23/22 - Uniting glass lenses
  • C03C21/00 - Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
  • G02C7/06 - bifocal multifocal; progressive

• US Classifications

  • 065 - Glass manufacturing
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 351 - Optics: eye examining, vision testing and correcting