Patent information:
| Patent: | Utility 271,994 |
| Patented: | February 6, 1883 |
| Applied: | August 22, 1882 |
| Title: | Electrical Insulator |
| Description: | Method of treating steatite to make artificial lava insulation |
| Category: | Lava |
| Assigned to: |
Patentee Information:
| STEWARD, Demetrius M. | Cincinnati, OH |
Class and subclass information:
| Class: | 106 | COMPOSITIONS: COATING OR PLASTIC |
| Subclass: | 782 | COATING OR PLASTIC COMPOSITIONS; Inorganic settable ingredient containing; Calcium sulfate (e.g., gypsum, anhydrite, plaster of Paris, etc.); Slag, cinder, mica, talc, glass, boron or elemental carbon containing; |
| Class: | 106 | COMPOSITIONS: COATING OR PLASTIC |
| Subclass: | 817 | COATING OR PLASTIC COMPOSITIONS; Inorganic settable ingredient containing; Rock, stone, gravel, trass, shell or carbonate containing (e.g., limestone, etc.); |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 110R | CONDUITS, CABLES OR CONDUCTORS; Insulated; |
Known specimens:
| None known |
Drawings:
Page 1 |