US PATENT SUBCLASS 65 / 30.1
.~ With chemically reactive treatment of glass preform

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

17.1  DF  PROCESSES {32}
30.1.~ With chemically reactive treatment of glass preform {4}
30.11  DF  .~.~> To enhance the ability to darken or change color in response to radiation exposure (e.g., photochromic)
30.12  DF  .~.~> To hydrate the glass
30.13  DF  .~.~> With metal ion penetrating into glass (i.e., ion exchange) {1}
31  DF  .~.~> By etching or leaching

DEFINITION

Classification: 65/30.1

With chemically reactive treatment of glass preform:

(under subclass 17.1) Processes combined with a treatment of a glass preform by a material which chemically reacts therewith.

(1) Note. This subclass includes patents claiming the step of coating a glass substrate and reacting the coating with a constituent of the glass substrate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20, and 22, for processes including a foaming step which may involve a chemical reaction.

SEE OR SEARCH CLASS

427, Coating Processes,

399+, for processes of coating, per se, wherein a substrate other than glass supplies at least a portion of the coating.