Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4491656 | Polyphosphates and process of preparation | Bernhard Schulte, Hans-Dieter Block, Dieter Freitag | 1985-01-01 |
| 4482693 | Polyphosphates and the production thereof | Paul J. Mayska, Hans-Dieter Block, Dieter Freitag | 1984-11-13 |
| 4481338 | Flame-resistant polymer mixtures | Werner Nouvertne, Dieter Freitag | 1984-11-06 |
| 4463130 | Flame-resistant polymer mixtures | Horst Peters, Udo Rudolph, Josef Buekers, Werner Nouvertne, Dieter Freitag | 1984-07-31 |
| 4404363 | Separation of diphasic mixtures containing aromatic polyesters | Dieter Freitag, John Goossens, Ludwig Bottenbruch, Uwe Hucks | 1983-09-13 |
| RE31165 | Transparent moulding composition of a polycarbonate and a resin | Gert Humme, Karl-Heinz Ott, Wolfgang Cohnen, Hugo Vernaleken | 1983-03-01 |
| 4371691 | Preparation of polycarbonate from specific crude bisphenols | Gerhard Friedhofen, Rainer Neumann, Dieter Freitag, Hans-Helmut Schwarz | 1983-02-01 |
| 4348542 | Process for the production of mixtures of alkylated aromatic hydroxy compounds | Rainer Neumann, Gerhard Friedhofen, Dieter Freitag, Jürgen Heuser, Hans-Helmut Schwarz | 1982-09-07 |
| 4338429 | Process for working up polycarbonates | John Goossens, Ludwig Bottenbruch, Dieter Freitag | 1982-07-06 |
| 4316980 | Process for the preparation of tetramethylated bisphenol polycarbonates | Karsten-Josef Idel, Dieter Freitag, Gerd Fengler | 1982-02-23 |
| 4293687 | Tetraalkylated biscyclohexylamine derivatives | Oskar Weissel, Hans-Josef Buysch | 1981-10-06 |
| 4239861 | Polyvinyl chloride-polycarbonate alloys | Hans-Eberhard Braese, Winfried Fischer, Dietrich Hardt, Richard Prinz | 1980-12-16 |
| 4218545 | Thermoplastic rubber blends of polycarbonates and block copolymers | Manfred Beck, Leo Morbitzer, Gert Humme, Jochen Schnetger | 1980-08-19 |
| 4202949 | Branched segment polymers | Manfred Beck, Jochen Schnetger, Gottfried Pampus | 1980-05-13 |
| 4196276 | High-molecular weight, segmented, polycarbonate elastomers | Manfred Schreckenberg, Klaus Konig, Dieter Freitag | 1980-04-01 |