Patent information:
| Patent: | Utility 1,171,205 |
| Patented: | February 8, 1916 |
| Applied: | August 18, 1909 |
| Title: | Process of Manufacturing Porcelain Articles |
| Description: | Method of forming the shape of a spark plug insulator from a dry blank |
| Category: | Manufacturing |
| Assigned to: |
Patentee Information:
| JEFFERY, Joseph Arthur | Newark, NJ |
| JEFFERY, Benjamin Alfred | Newark, NJ |
Class and subclass information:
| Class: | 264 | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| Subclass: | 679 | OUTSIDE OF MOLD SINTERING OR VITRIFYING OF SHAPED INORGANIC ARTICLE OR PREFORM; Of clay containing material; |
| Class: | 451 | ABRADING |
| Subclass: | 167 | |
| Class: | 451 | ABRADING |
| Subclass: | 247 | |
| Class: | 451 | ABRADING |
| Subclass: | 41 |
Known specimens:
| None known |
Drawings:
Page 1 |
Page 2 |