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: | 65 | GLASS MANUFACTURING |
| Subclass: | 116 | PROCESSES; Glass preform treating; Tempering; Quenching in liquid bath; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 137B | INSULATORS; Compositions; |
Known specimens:
| None known |
Drawings:
Page 1 |