US PATENT SUBCLASS 428 / 410
.~ Surface modified glass (e.g., tempered, strengthened, etc.)

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

409  DF  SURFACE PROPERTY OR CHARACTERISTIC OF WEB, SHEET OR BLOCK {1}
410.~ Surface modified glass (e.g., tempered, strengthened, etc.)

DEFINITION

Classification: 428/410

(under subclass 409) Product comprising the composition commonly known as glass* in which the surface has been treated and so altered to yield a physical proper different from the portion adjacent thereto.

(1) Note. Examples of surface modifications are: tempering or strengthening, crystallizing, etc.