Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684180 | Fractionation and purification of aromatic polyamine mixtures and the use thereof | Michael Brockelt | 1997-11-04 |
| 5679841 | Fractionation and purification of aromatic polyamine mixtures and the use thereof | Michael Brockelt | 1997-10-21 |
| 5679840 | Fractionation and purification of aromatic polyamine mixtures and the use thereof | Michael Brockelt | 1997-10-21 |
| 5675035 | Fractionation and purification of aromatic polyamine mixtures and the use thereof | Michael Brockelt | 1997-10-07 |
| 5672737 | Fractionation and purification of mixtures of aromatic polyamines and use thereof | Michael Brockelt | 1997-09-30 |
| 5663424 | Fractionation and purification of aromatic polyamine mixtures and the use thereof | Michael Brockelt | 1997-09-02 |
| 5648520 | Fractionation and purification of aromatic polyamine and the use thereof | Michael Brockelt | 1997-07-15 |
| 5648519 | Fractionation and purification of aromatic polyamine mixtures and the use thereof | Michael Brockelt | 1997-07-15 |
| 5359141 | Process for the production of polynuclear aromatic polyamines | Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf, Hans-Peter Schal | 1994-10-25 |
| 5196591 | Process for the production of polynuclear aromatic polyamines | Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf, Hans-Peter Schal | 1993-03-23 |
| 5043471 | Process for the preparation of polyisocyanates | Gunter Hammen, Wolfgang Friederichs | 1991-08-27 |
| 4924028 | Process for the production of polynuclear aromatic polyamines | Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf | 1990-05-08 |
| 4914236 | Process for the preparation of multinuclear aromatic polyamines | Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf | 1990-04-03 |
| 4879409 | Cycloaliphatic diisocyanates, optionally in the form of isomeric mixtures and a process for their preparation | Michael Brockelt, Stefan Penninger, Herbert Stutz | 1989-11-07 |
| 4879408 | Cycloaliphatic diisocyanates optionally in the form of isomer mixtures and a process for their production | Michael Brockelt, Stefan Penninger, Herbert Stutz | 1989-11-07 |
| 4786751 | Dissocyanates, diisocyanate mixtures and a process for their production | Michael Brockelt, Stefan Penninger, Herbert Stutz | 1988-11-22 |
| 4761498 | Diisocyanates and diisocyanate mixtures based on diphenylmethane, processes for their production and their use as isocyanate component in the production of polyurethane plastics by the isocyanate polyaddition process | Michael Brockelt, Gerhard Wegener | 1988-08-02 |
| 4720582 | Diamines and a process for their production | Michael Brockelt, Stefan Penninger | 1988-01-19 |
| 4698424 | Isocyanato-isocyanurate derivatives | Theodor Engbert, Gerhard Wegener | 1987-10-06 |
| 4692550 | Continuous process for thermal splitting of carbamic acid esters | Theodor Engbert, Gunter Hammen, Klaus Konig | 1987-09-08 |
| 4675437 | Cycloaliphatic triisocyanates | Stefan Penninger, Michael Brockelt, Gunter Hammen, Herbert Stutz | 1987-06-23 |
| 4613687 | Polyisocyanates of the diphenyl methane series | Michael Brockelt | 1986-09-23 |
| 4603189 | Triisocyanates and a process for their preparation | Stefan Penninger, Michael Brockelt, Gunter Hammen, Herbert Stutz | 1986-07-29 |
| 4593117 | Process for the preparation of N- and O-substituted diurethanes and/or polyurethanes | Stefan Penninger, Gunther Hammen, Peter Heitkamper | 1986-06-03 |
| 4587058 | Diisocyanates of the diphenyl methane series and processes for the production thereof | Michael Brockelt | 1986-05-06 |