Patent information:
| Patent: | Utility 2,972,211 |
| Patented: | February 21, 1961 |
| Applied: | June 21, 1955 |
| Title: | Method of Manufacturing a Glass Insulator |
| Description: | Method of tempering glass insulators where the head is toughened more than the rest of the insulator |
| Category: | Glass |
| Assigned to: | Pilkington Brothers Ltd. |
Patentee Information:
| JELLYMAN, Philip E. | St. Helens,, England |
| MACINTOSH, Hamish Fraser | Brora,, Scotland |
| WILCOCK, John E. | St. Helens,, England |
Class and subclass information:
| Class: | 65 | GLASS MANUFACTURING |
| Subclass: | 69 | PROCESSES; Forming product or preform from molten glass; Initial forming of hollow product or preform in mold cavity; With annealing or tempering; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 188 | INSULATORS; With terminal elements; Cap type; |
Known specimens:
| None known |
Drawings:
Page 1 |