Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4294666 | Process for the manufacture of 4,4'-diphenyl-methane diisocyanate and a mixture of diphenyl-methane diisocyanate isomers containing a small amount of uretdiones and hydrolyzable chlorine | Horst Brandtstaedter, Rainer Ohlinger, Willy van Pee, Jaak Van Steen, Friedrich Sauer +2 more | 1981-10-13 |