Patent information:
| Patent: | Utility 2,418,713 |
| Patented: | April 8, 1947 |
| Applied: | September 14, 1944 |
| Title: | Thermally Toughened Insulator |
| Description: | CD 228.5: tempering the surface of glass insulators for added strength |
| Category: | Insulator |
| Assigned to: | Owens-Illinois Glass Co. |
Patentee Information:
| HOLMES, Minot K. | Muncie, IN |
| PLUMMER, Jesse H. | Toledo, OH |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 209 | INSULATORS; Sectional, multi-part, composite, or coated; |
| Class: | 65 | GLASS MANUFACTURING |
| Subclass: | 41 | PROCESSES; Fusion bonding of glass to a formed part; With annealing or tempering of glass; |
| Class: | 65 | GLASS MANUFACTURING |
| Subclass: | 115 | PROCESSES; Glass preform treating; Tempering; Differential or localized; |
| Class: | 65 | GLASS MANUFACTURING |
| Subclass: | 348 | PRODUCT COOLING MEANS (E.G., TEMPERING); |
Known specimens:
| Number: | CD 228.5 |
Drawings:
Page 1 |