United States Patent 3,546,036
December 8, 1970

Process for Etch-Polishing Sapphire and other Oxides
Harold M. Manasevit

Filed June 13, 1966
Image of US PATENT 3,546,036

Abstract of the Disclosure

The invention is directed to a process for improving the quality of surfaces of refractory inorganic oxide materials comprising etch-polishing of the surfaces of the material by the steps of heating the material to an elevated temperature and exposing the surface of the material to a fluoride containing gas.
Figure descriptions: cover graphic

  • Figure 1 is an illustration of an apparatus which may be used in practicing and process described herein.

 Citations [54]:
3,366,520 1968 Berkenblit et al. 3,392,069 1968 Merkel et al.
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