Issued Patents All Time
Showing 51–60 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6569974 | Polymeric phosphinic acids and salts thereof | Norbert Weferling, Hans-Peter Schmitz | 2003-05-27 |
| 6420598 | Process for preparing alkylphosphonic acids | Norbert Weferling, Hans-Peter Schmitz | 2002-07-16 |
| 6388125 | Process for preparing phosphinic acids | Hans-Peter Schmitz | 2002-05-14 |
| 6380273 | Process for producing flame-retardant flexible polyurethane foams | Christian Eilbracht | 2002-04-30 |
| 6359171 | Process for preparing dialkylphosphinic acids and their salts | Norbert Weferling, Gunter Kolbe, Hans-Peter Schmitz | 2002-03-19 |
| 6278012 | Process for preparing phosphinate esters | Sebastian Hörold, Norbert Weferling, Heinz-Peter Breuer | 2001-08-21 |
| 5985965 | Flame-resistant polyurethanes | Horst Staendeke | 1999-11-16 |
| 5728746 | Process for the preparation of mixtures of oligomeric phosphoric acid esters and their use as flame-proofing agents for polyurethane foams | — | 1998-03-17 |
| 5608100 | Oligomeric phosphoric acid esters which carry hydroxyalkoxy groups, their preparation and their use | — | 1997-03-04 |
| 5326805 | Flame-retardant plastics molding composition of improved stability | Wolfgang Wanzke | 1994-07-05 |