Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6770779 | Process for preparing alkylphosphonite esters | Norbert Weferling, Martin Sicken, Hans-Peter Schmitz | 2004-08-03 |
| 6534673 | Process for preparing salts of dialkylphosphinic acids | Norbert Weferling, Hans-Peter Schmitz | 2003-03-18 |
| 6359171 | Process for preparing dialkylphosphinic acids and their salts | Norbert Weferling, Martin Sicken, Hans-Peter Schmitz | 2002-03-19 |
| 6355832 | Processing for preparing salts of dialkylphosphinic acids | Norbert Weferling, Hans-Peter Schmitz | 2002-03-12 |
| 6329544 | Process for preparing dialkylphosphinic acids | Norbert Weferling, Hans-Peter Schmitz | 2001-12-11 |
| 6300516 | Process for preparing dialkylphosphinic acids | Norbert Weferling, Hans-Peter Schmitz | 2001-10-09 |
| 6011172 | Process for alkylating elemental phosphorus | Norbert Weferling, Othmar Stelzer | 2000-01-04 |
| 5973194 | Process for preparing dialkylphosphinate salts | Norbert Weferling, Hans-Peter Schmitz | 1999-10-26 |