Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814105 | Method of preparing a luminescent quartz glass activated by bivalent europium, luminescent quartz glass obtained by such a method and luminescent screen provided with such a luminescent quartz glass | Emmanuel Papanikolau, Gijsbertus A. C. M. Spierings | 1989-03-21 |
| 4798681 | Luminescent quartz glass, method of preparing such a glass and luminescent screen provided with such a glass | Joseph G. Van Lierop, Anne-Marie Andree Van Dongen | 1989-01-17 |
| 4798768 | Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and luminescent screen provided with such a glass | Anne-Marie Andree Van Dongen | 1989-01-17 |