Dormagen
Germany
3
2008-11-06
The entities that hold a legal rights for patent applications filed by inventor Echterhoff Ralf:
Ralf Echterhoff from Dormagen, DE has applied for patents for these inventions. The list has both pending applications and granted patents:
Process for the preparation of 4,4'-diphenylmethane diisocyanate
#2 | 2005-10-27Production of di- and polyisocyanates of the diphenylmethane series with defined acidity
#3 | 2005-01-27Production of mixtures of diisocyanates and polyisocyanates from the diphenylmethane series with high contents of 4,4′-methylenediphenyl diisocyanate and 2,4′-methylenediphenyl diisocyanate
4288975 ⎘