Inventor

SEYFERT WILFRIED

DE7 patents

⚠️ This page may combine multiple inventors who share the name “SEYFERT WILFRIED”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BASF AG

6 patents

US6433219B1Aug 13, 2002

Method for the production of methylenedi(phenylamine and methylenedi(phenyl isocyanate)

BASF AG56 citations94

US7230130B2Jun 12, 2007

Process for preparing methylenedianiline and methylenebis (phenylisocyanate)

BASF AG17 citations91

US6831192B2Dec 14, 2004

Process for preparing methylenedianiline and methylenebis(phenyl isocyanate)

BASF AG20 citations91

US4946029AAug 7, 1990

Purification of carboxylic esters which contain aldehydes, acetals and/or unsaturated compounds

BASF AG9 citations71

US4810798AMar 7, 1989

Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures

BASF AG3 citations60

US5159107AOct 27, 1992

Continuous preparation of alkyl pentenoates

BASF AG3 citations58

BASF CORP

1 patent

US6229043B1May 8, 2001

Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content

BASF CORP10 citations73