Patent information:
| Patent: | Utility 1,623,301 |
| Patented: | April 5, 1927 |
| Applied: | May 9, 1922 |
| Title: | Heat Resisting Glass |
| Description: | Glass of nearly opaque nature, probably that used for Fry insulators |
| Category: | Glass |
| Assigned to: | H. C. Fry Glass Co. |
Patentee Information:
Class and subclass information:
| Class: | 501 | COMPOSITIONS: CERAMIC |
| Subclass: | 59 | 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 halogen or nitrogen; Fluorine; And boron; And aluminum; |
| 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:
|