US PATENT SUBCLASS 65 / 114
.~.~ Tempering

Current as of: June, 1999
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65 /   HD   GLASS MANUFACTURING

17.1  DF  PROCESSES {32}
111  DF  .~ Glass preform treating {4}
114.~.~ Tempering {2}
115  DF  .~.~.~> Differential or localized
116  DF  .~.~.~> Quenching in liquid bath

DEFINITION

Classification: 65/114

(under subclass 111) Processes involving heating a glass preform to near the softening point under rigorous control and rapidly cooling the glass from such point to set up compressive stresses in the glass surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

111, for Search Notes relating to tempering.

348+, for tempering apparatus; see the "Search Notes" thereunder.