Patent information:
| Patent: | Utility 1,304,623 |
| Patented: | May 27, 1919 |
| Applied: | June 24, 1915 |
| Title: | Glass |
| Description: | Boro-silicate glass (Corning Pyrex glass) |
| Category: | Boron |
| Assigned to: | Corning Glass Works |
Patentee Information:
| SULLIVAN, Eugene C. | Corning, NY |
| TAYLOR, William C. | Corning, NY |
Class and subclass information:
| 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; |
| Class: | 122 | LIQUID HEATERS AND VAPORIZERS |
| Subclass: | 23 | |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 209 | INSULATORS; Sectional, multi-part, composite, or coated; |
Known specimens:
| Number: |  |