Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5630322 | Process and apparatus for heat treatment of workpieces by quenching with gases | Paul Heilmann, Klaus Loser | 1997-05-20 |
| 5372655 | Method for the treatment of alloy steels and refractory metals | Peter Minarski, Albrecht Melber, Klaus Zimmerman | 1994-12-13 |
| 5362031 | Method and apparatus for the automatic monitoring of operating safety and for controlling the progress of the process in a vacuum heat-treatment oven | Paul Heilmann, Peter Minarski | 1994-11-08 |
| 5292555 | Process for applying nitride layers to titanium | — | 1994-03-08 |
| 5225142 | Method and apparatus for the automatic monitoring of operating safety and for controlling the progress of the process in a vacuum heat-treatment oven | Paul Heilmann, Peter Minarski | 1993-07-06 |
| 5211768 | Method of nitriding work pieces of steel under pressure | Rudolf Seif | 1993-05-18 |
| 4906330 | Process for the disposal of hardening-shop wastewaters | — | 1990-03-06 |
| 4869470 | Vacuum furnace for heat treatment of metallic workpieces | Paul Heilmann, Fritz Kalbfleisch, Rolf Schuster | 1989-09-26 |
| 4867808 | Heat treating a metallic workpiece by quenching under cooling gas under above atmospheric pressure and specified circulation rate | Paul Heilmann, Rolf Schuster | 1989-09-19 |