Patent information:

Patent:Utility 176,067
Patented:April 11, 1876
Applied:March 2, 1876
Title:Improvement in Processes for Toughening Glass
Description:Method of annealing glass
Category:Glass
Assigned to: 

Patentee Information:

ROGERS, George E. Chelsea, MA

Class and subclass information:

Class:65GLASS MANUFACTURING
Subclass:116PROCESSES Glass preform treating Tempering Quenching in liquid bath;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:137BINSULATORS Compositions;

Known specimens:

None known

Drawings:

Drawing page 1

Page 1