Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4606946 | Method of applying interleaving material to glass sheets | Paul F. Duffer, Helmut Franz | 1986-08-19 |
| 4568605 | Acidified powdered interleaving | Paul F. Duffer, Helmut Franz | 1986-02-04 |
| 4530889 | Acidified powdered interleaving | Paul F. Duffer, Helmut Franz | 1985-07-23 |
| 4529648 | Method of applying interleaving material to glass sheets | Paul F. Duffer, Helmut Franz | 1985-07-16 |
| 4489106 | Two step interleaving method | Paul F. Duffer, Helmut Franz | 1984-12-18 |
| 4487807 | Mixed acid stain inhibitor | Paul F. Duffer, Helmut Franz | 1984-12-11 |
| 4447496 | Organotin surface treatment and interleaving material for glass sheets | Helmut Franz, Paul F. Duffer | 1984-05-08 |
| 4419176 | Apparatus comprising arrangement of vacuum cups to assemble one or more bent glass sheets with a sheet of flexible interlayer material | James L. Valimont | 1983-12-06 |
| 4368087 | Arrangement of vacuum cups to assemble one or more bent glass sheets with a sheet of flexible interlayer material | James L. Valimont | 1983-01-11 |
| 4360544 | Organotin surface treatment and interleaving material for glass sheets | Helmut Franz, Paul F. Duffer | 1982-11-23 |
| 4277299 | Release molds for laminating bilayer safety glass | Joseph Cherenko, William I. Frey, Larry S. Sokol | 1981-07-07 |