Patent information:
| Patent: | Utility 1,723,174 |
| Patented: | August 6, 1929 |
| Applied: | March 26, 1927 |
| Title: | Use of Dumortierite |
| Description: | Porcelain composition use the mineral dumortierite which allows firing at a lower temperature |
| Category: | Porcelain |
| Assigned to: | Champion Porcelain Co. |
Patentee Information:
Class and subclass information:
| Class: | 501 | COMPOSITIONS: CERAMIC |
| Subclass: | 143 | CERAMIC COMPOSITIONS; Clay containing (e.g., porcelain, earthenware, etc.); And flint or feldspar; |
Known specimens:
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