Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4757156 | Process for making tertiary alkylphosphines | Norbert Weferling, Hans-Werner Stephan, Friedrich-Karl Frorath | 1988-07-12 |
| 4639331 | Process for making pulverulent ammonium polyphosphates stable to hydrolysis | Horst Staendeke, Gero Heymer | 1987-01-27 |
| 4450147 | Process for making alkali metal hypophosphite solutions | Hermann Hack | 1984-05-22 |
| 4351960 | Production of an isomeric mixture of secondary phosphines | Hartfrid Vollmer, Gero Heymer | 1982-09-28 |
| 4324919 | Production of tertiary phosphines | Hartfrid Vollmer, Ernst Reutel | 1982-04-13 |
| 4258022 | Continuous production of phosphine | Werner Klose, Christian May, Gero Heymer | 1981-03-24 |