Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457871 | Bearing mechanism | Clayton W. Guensche | 2002-10-01 |
| 6007789 | Method of nitriding silicon | — | 1999-12-28 |
| 5405592 | Non-densified silicon nitride beta-phase material | Bohdan Lisowsky | 1995-04-11 |
| 5364608 | Method of converting a silicon nitride from alpha-phase to beta-phase, apparatus used therefor, and silicon nitride material made therefrom | — | 1994-11-15 |
| 5344634 | Method of nitriding silicon | — | 1994-09-06 |
| 5252248 | Process for preparing a base nitridable silicon-containing material | Bondan Lisowsky | 1993-10-12 |
| 5213729 | Process for preparing a densified beta-phase silicon nitride material having at least one densification aid, and the material resulting therefrom | Bohdan Lisowsky | 1993-05-25 |
| 5187129 | Process for making silicon nitride and powders and articles made therefrom | Bohdan Lisowsky | 1993-02-16 |
| 5166106 | Silicon-containing material having at least one densification aid including alumina | Bohdan Lisowsky | 1992-11-24 |
| 5160719 | Process for nitriding silicon containing materials | — | 1992-11-03 |
| 5156830 | Process for preparing an alpha-phase silicon nitride material and thereafter converting to non-densified beta-phase material | Bohdan Lisowsky | 1992-10-20 |
| 5085582 | Silicon nitride containers for the sintering of silicon nitride ceramics | — | 1992-02-04 |
| 5079198 | Ceramic phase in sintered silicon nitride containing cerium, aluminum, and iron | Bohdan Lisowsky | 1992-01-07 |
| 5055432 | Process for preparing a nitridable silicon-containing material having at least one densification aid including alumina, and the material resulting therefrom | Bohdan Lisowsky | 1991-10-08 |
| 4943401 | Process for making silicon nitride articles | Bohdan Lisowsky | 1990-07-24 |
| 4781874 | Process for making silicon nitride articles | — | 1988-11-01 |