3756482 is referenced by 15 patents and cites 4 patents.

A pattern is scored in a major surface of a piece of flat glass, and the score is propagated into a fracture that extends at least almost entirely to an opposite major surface of the piece. Heat is applied at a location adjacent to an edge of the piece until a red glow is visible at the glass surface. At that time, an edge nick is applied to the glass adjacent to the red glow to complete a vent from the edge nick to the fracture defining the pattern. This is repeated several times to free the pattern from its trim without damaging the edge of the pattern.

Title
Method of removing trim from patterns
Application Number
05/248,468
Publication Number
3756482
Application Date
April 28, 1972
Publication Date
September 4, 1973
Inventor
De Torre Robert P
Assignee
PPG
IPC
B26f 03/06
C03B 33/00
C03B 33/04
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