Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5126422 | Coating compositions and coated heat-resistant substrates prepared therefrom | Reinhard Halpaap, Holger Casselmann, Hans Schlegel | 1992-06-30 |
| 5126479 | Process for the production of blocked polyisocyanates containing carbodiimide groups, the polyisocyanates obtainable by this process and their use for the production of plastics | Reinhard Halpaap, Josef Pedain | 1992-06-30 |
| 5061515 | Lacquer binders, a process for coating heat resistant substrates and the coated substrates | Hans Schlegel | 1991-10-29 |
| 4954577 | Lacquer binders, coating compositions and wire enamels based on polyamideimides and isocyanates carrying carbodiimide and/or uretone imine groups | Hans Schlegel, Reinhard Halpaap, Josef Pedain | 1990-09-04 |
| 4853261 | Process for the preparation of coatings with hydantoin structures by the reaction of compounds containing carbodiimide groups with unsaturated carboxylic acids | Hans Schlegel, Reinhard Halpaap, Josef Pedain | 1989-08-01 |
| 4565843 | Lacquer solutions based on hydantoin group-containing polymers | — | 1986-01-21 |
| 4546162 | Polyamidoimides prepared from trimelitic acid anhydride, isocyanates and either lactams or polyamides using a mixture of diisocyanatodiphenylmethane and tolylene diisocyanates | Wilfried Zecher, Rudolf Merten, Klaus Reinking | 1985-10-08 |
| 4517353 | Process for preparation of hydantoin esters through a masked polyisocyanate-carbodiimide route | Wilfried Zecher, Rudolf Merten | 1985-05-14 |
| 4472567 | Process for the production of polyamide imides | Wilfried Zecher, Rudolf Merten | 1984-09-18 |
| 4465839 | Process for the production of hydantoins | Bernhard Schulte, Wolfgang Jakob, Karl-Heinrich Meyer | 1984-08-14 |
| 4465840 | Process for the production of (thio) hydantoins | Bernhard Schulte, Wolfgang Jakob, Karl-Heinrich Meyer | 1984-08-14 |
| 4448942 | Process for the production of hydantoins | Bernhard Schulte, Wolfgang Jakob, Karl-Heinrichrich Meyer | 1984-05-15 |
| 4444845 | "Process for the production of coatings and the use of N,N',N""-tris-(2-hydroxyethyl)-isocyanurate as additives for polyurethane based wire lacquers" | — | 1984-04-24 |
| 4298515 | Process for the preparation of polymers containing hydantoin groups | Jurgen Lewalter, Ludwig Rottmaier, Rudolf Merten, Wilfried Zecher, Bernhard Schulte | 1981-11-03 |
| 4293669 | Heat-resistant cross-linked polymers and the use thereof as binders | Ludwig Rottmaier, Rudolf Merten, Jurgen Lewalter, Wilfried Zecher | 1981-10-06 |
| 4289868 | Polyhydantoins from unsaturated carboxylic acids and polyiso(thio)cyanates | Jurgen Lewalter, Rudolf Merten, Wilfried Zecher | 1981-09-15 |
| 4281095 | Coating compositions obtained by reacting amino carboxylic acids derivatives with polyisocyanates and compounds containing carboxylic groups to produce polymers containing hydantoin rings and amide groups | Jurgen Lewalter, Rudolf Merten, Ludwig Rottmaier, Bernhard Schulte, Karl-Heinrich Meyer | 1981-07-28 |
| 4269750 | Process for the preparation of polymers containing hydantoin groups | Jurgen Lewalter, Ludwig Rottmaier, Rudolf Merten, Wilfried Zecher, Bernhard Schulte | 1981-05-26 |
| 4246393 | Process for the preparation of poly(thio)hydantoins | Wilfried Zecher, Jurgen Lewalter, Rudolf Merten | 1981-01-20 |
| 4212982 | Polyisocyanates with at least one hydantoin or thiohydantoin ring substituted by carboxylic acid amide groups | Jurgen Lewalter, Rudolf Merten, Wilfried Zecher | 1980-07-15 |
| 4187365 | Process for the production of polycondensate containing cyclic imide groups | Wilfried Zecher, Werner Clarenz, Rudolf Merten | 1980-02-05 |