Inventor · Wittmund, DE

Fritz Pohl

16Patents
9h-index
48Co-inventors
72Inventor score

Filing activity: Nov 8, 1983 → Dec 14, 2009

Most-cited inventions

PatentTitleAreaCited byStatus
US7253321B2 Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation Chemistry; Metallurgy 19 Expired
US5563296A Continuous process for preparing aromatic amines Performing Operations; Transporting 13 Expired
US4522952A Process for the fluorination of polymers, and perfluorinated ion exchangers Chemistry; Metallurgy 13 Expired
US7312362B2 Process for the production of di- and polyamines of the diphenylmethane series Chemistry; Metallurgy 12 Active
US9024057B2 Process for the preparation of isocyanates in the gas phase Chemistry; Metallurgy 12 Active
US7547801B2 Process for the continuous preparation of isocyanates Chemistry; Metallurgy 12 Active
US7541487B2 Process for the preparation of isocyanates in the gas phase Chemistry; Metallurgy 11 Active
US7528283B2 Process for preparing diamines and polyamines from the diphenylmethane series Chemistry; Metallurgy 11 Active
US7615662B2 Process for the preparation of isocyanates in the gas phase Chemistry; Metallurgy 10 Active
US9701617B2 Process for producing diamines and polyamines of the diphenylmethane series Chemistry; Metallurgy 5 Active
US7511176B2 Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes Chemistry; Metallurgy 2 Active
US8399702B2 Process for the production of aromatic diisocyanates in the gas Chemistry; Metallurgy 2 Active
US8318971B2 Process for preparing methylenediphenyl diisocyanates Chemistry; Metallurgy 2 Active
US7495136B2 Process for the production of dinitrotoluene Chemistry; Metallurgy 2 Active
US9365503B2 Process for the preparation of isocyanates in the gas phase Chemistry; Metallurgy 1 Active
US5248812A Process for the isolation of 2-naphthylamine-1,5-disulphonic acid Chemistry; Metallurgy 0 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.