Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5093457 | Production of polyamide imides | Rolf Dhein, Aziz El-Sayed, Wilfried Haese | 1992-03-03 |
| 5004795 | Aliphatic-aromatic polyamide-imides | Aziz El-Sayed, Wilfried Haese, Burkhard Kohler, Rolf-Volker Meyer | 1991-04-02 |
| 4910045 | Process for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfaces | Henning Giesecke, Gerhard D. Wolf | 1990-03-20 |
| 4908429 | Special polyimides as thermoplasts | Dieter Arlt, Aziz E. Sayed | 1990-03-13 |
| 4908430 | Use of special polyimides as cast films and coatings | Dieter Arlt, Lutz Schrader, Werner Waldenrath | 1990-03-13 |
| 4829140 | Polyamidimides having modified end groups | Klaus Reinking | 1989-05-09 |
| 4792590 | Aliphatic-aromatic polyamidimides containing polyamides | Klaus Reinking | 1988-12-20 |
| 4640970 | Process for the production of polyamide imides | Klaus Reinking, Frank Kleiner | 1987-02-03 |
| 4628079 | Polyamide imides produced from either lactams or polyamides with isocyanates or anhydrides in which products are precipitated with a non-solvent | Rolf Dhein, Klaus Reinking | 1986-12-09 |
| 4624981 | Process for the production of polyamideimides from polyisocyanates, polycarboxylic acid anhydrides and lactams or polyamides in which the reaction products are precipitated with a non-solvent | Rolf Dhein, Klaus Reinking | 1986-11-25 |
| 4600729 | Process for the preparation of aliphatic-aromatic poly-amide-imides in the absence of phenols | Klaus Reinking | 1986-07-15 |
| 4549006 | Polyamideimides produced from either lactams or polyamides with isocyanates and anhydrides as thermoplasts | Rolf Dhein, Klaus Reinking | 1985-10-22 |
| 4548970 | Polyamideimides prepared by reacting either lactams or polyamides with polyisocyanates and anhydrides using a lactam as an additive | Rolf Dhein, Klaus Reinking | 1985-10-22 |
| 4546162 | Polyamidoimides prepared from trimelitic acid anhydride, isocyanates and either lactams or polyamides using a mixture of diisocyanatodiphenylmethane and tolylene diisocyanates | Willi Dunwald, Rudolf Merten, Klaus Reinking | 1985-10-08 |
| 4546138 | Process for the production of polyamide imides by using a phenol in the workup of the material | Rolf Dhein, Klaus Reinking | 1985-10-08 |
| 4517353 | Process for preparation of hydantoin esters through a masked polyisocyanate-carbodiimide route | Rudolf Merten, Willi Dunwald | 1985-05-14 |
| 4515974 | Process for the preparation of fumaric acid monoesters | Rudolf Merten | 1985-05-07 |
| 4472567 | Process for the production of polyamide imides | Rudolf Merten, Willi Dunwald | 1984-09-18 |
| 4384122 | Process for the production of imidazolidine triones | Rudolf Merten | 1983-05-17 |
| 4298515 | Process for the preparation of polymers containing hydantoin groups | Jurgen Lewalter, Ludwig Rottmaier, Rudolf Merten, Willi Dunwald, Bernhard Schulte | 1981-11-03 |
| 4293669 | Heat-resistant cross-linked polymers and the use thereof as binders | Ludwig Rottmaier, Rudolf Merten, Jurgen Lewalter, Willi Dunwald | 1981-10-06 |
| 4289868 | Polyhydantoins from unsaturated carboxylic acids and polyiso(thio)cyanates | Jurgen Lewalter, Rudolf Merten, Willi Dunwald | 1981-09-15 |
| 4281140 | Process for the preparation of hydantoins | Rudolf Merten | 1981-07-28 |
| 4269750 | Process for the preparation of polymers containing hydantoin groups | Jurgen Lewalter, Ludwig Rottmaier, Rudolf Merten, Willi Dunwald, Bernhard Schulte | 1981-05-26 |
| 4246393 | Process for the preparation of poly(thio)hydantoins | Jurgen Lewalter, Rudolf Merten, Willi Dunwald | 1981-01-20 |