Patent information:
| Patent: | Utility 170,339 |
| Patented: | November 23, 1875 |
| Applied: | November 3, 1875 |
| Title: | Improvement in Processes of Annealing Glass |
| Description: | Process of annealing glass |
| Category: | Glass |
| Assigned to: | |
Patentee Information:
Class and subclass information:
| Class: | 65 | GLASS MANUFACTURING |
| Subclass: | 117 | PROCESSES; Glass preform treating; Annealing; |
| Class: | 65 | GLASS MANUFACTURING |
| Subclass: | 116 | PROCESSES; Glass preform treating; Tempering; Quenching in liquid bath; |
Known specimens:
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