Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886539 | Method of vacuum refining of glassy materials with selenium foaming agent | Richard L. Gerutti, David R. Haskins, Robert B. Heithoff, Wright M. Welton | 1989-12-12 |
| 4874313 | Refractory clad lid for heating vessel | — | 1989-10-17 |
| 4849004 | Pulsed pressure method for vacuum refining of glassy materials | David A. Hanekamp, Jr., Homer R. Foster | 1989-07-18 |
| 4824462 | Flow control means for molten glass or the like | — | 1989-04-25 |
| 4819859 | Lamination of oxide dispersion strengthened platinum and alloys | — | 1989-04-11 |