Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5145804 | Enamel powder for electrostatic application | Hans-Joachim Schittenhelm | 1992-09-08 |
| 5075263 | Enamel frits for acid-resistant one-coat enamelling on unpickled steels | Hans-Joachim Schittenhelm | 1991-12-24 |
| 5013362 | Fluorine-free superopaque enamel frits | Hans-Joachim Schittenhelm | 1991-05-07 |
| 4847218 | Enamel frits for sheet steel with improved bonding | Hans-Joachim Schittenhelm | 1989-07-11 |
| 4713530 | Heating element combined glass/enamel overcoat | Hans-Joachim Schittenhelm, Gerhard Trogel | 1987-12-15 |
| 4689271 | Coating for metallic substrates | Hans-Joachim Schittenhelm, Otto Krist | 1987-08-25 |
| 4659586 | Process for electrostatically spraying inorganic powders | Hans-Joachim Schittenhelm | 1987-04-21 |
| 4265929 | Single-bake two-layer enamelling with electrostatic powder coating | Gebhard Wagner | 1981-05-05 |
| 4246432 | Method and apparatus for melting frits for inorganic oxidic surface coatings by electric resistance heating | Hans Rinkes | 1981-01-20 |