Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872864 | Method of making a cathode from tungsten and aluminum powders | Louis E. Branovich, Gerard L. Freeman, Donald W. Eckart | 1989-10-10 |
| 4863410 | Method of making a long life high current density cathode from tungsten and iridium powders using a low melting point impregnant | Louis E. Branovich, Gerard L. Freeman, Donald W. Eckart | 1989-09-05 |
| 4840767 | Method of making a cathode from tungsten and iridium powders using a barium iridiate formed from barium peroxide and iridium oxide as the impregnant | Louis E. Branovich, Gerard L. Freeman, Donald W. Eckart | 1989-06-20 |
| 4818480 | Method of making a cathode from tungsten and iridium powders using a barium peroxide containing material as the impregnant | Louis E. Branovich, Gerard L. Freeman, Donald W. Eckart | 1989-04-04 |
| 4808137 | Method of making a cathode from tungsten and iridium powders using a bariumaluminoiridiate as the impregnant | Louis E. Branovich, Gerard L. Freeman | 1989-02-28 |