Patent information:
| Patent: | Utility 589,256 |
| Patented: | August 31, 1897 |
| Applied: | May 16, 1896 |
| Title: | Process of Making Insulating Material |
| Description: | Composition insulator made of paper pulp saturated with sulfur |
| Category: | Composition |
| Assigned to: | |
Patentee Information:
Class and subclass information:
| Class: | 264 | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| Subclass: | 136 | WITH PRINTING OR COATING OF WORKPIECE (OUT OF MOLD); Coating or impregnating workpiece before molding or shaping step; Impregnation of batt, sheet, or filament; |
| Class: | 4 | BATHS, CLOSETS, SINKS, AND SPITTOONS |
| Subclass: | 237 | |
| Class: | 264 | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| Subclass: | DIG54 | Processes in making insulators; |
Known specimens:
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