Patent information:
| Patent: | Utility 1,233,486 |
| Patented: | July 17, 1917 |
| Applied: | August 28, 1916 |
| Title: | Electrical Insulator |
| Description: | Boro-silicate glass |
| Category: | Boron |
| Assigned to: | |
Patentee Information:
Class and subclass information:
| Class: | 501 | COMPOSITIONS: CERAMIC |
| Subclass: | 65 | CERAMIC COMPOSITIONS; Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions; Silica containing; 40 percent - 90 percent by weight silica; And boron; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 209 | INSULATORS; Sectional, multi-part, composite, or coated; |
| Class: | 501 | COMPOSITIONS: CERAMIC |
| Subclass: | 66 | CERAMIC COMPOSITIONS; Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions; Silica containing; 40 percent - 90 percent by weight silica; And boron; And aluminum; |
Known specimens:
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