Inventor
SEIFERT HERMANN
DE24 patents
⚠️ This page may combine multiple inventors who share the name “SEIFERT HERMANN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
20 patentsUS4369096AJan 18, 1983
Process for the purification of epoxides
BAYER AG23 citations82
US4113747ASep 12, 1978
Process for the preparation of propylene oxide
BAYER AG19 citations81
US4214105AJul 22, 1980
Process for the hydroxylation of phenol
BAYER AG7 citations74
US4053523AOct 11, 1977
Process for the hydroxylation of phenol
BAYER AG11 citations74
US4045496AAug 30, 1977
Process for the hydroxylation of phenols and phenol ethers in the nucleus
BAYER AG8 citations74
US4341709AJul 27, 1982
Preparation of ε-caprolactone
BAYER AG15 citations73
US4137242AJan 30, 1979
Process for the preparation of propylene oxide
BAYER AG8 citations73
US6124504ASep 26, 2000
Process for preparing 4-hydroxyanilines
BAYER AG10 citations72
US4324925AApr 13, 1982
Process for the preparation of polyhydric phenols
BAYER AG8 citations72
US5948930ASep 7, 1999
Process for preparing O-alkyl, O-alkylphosphorochloridothioates
BAYER AG7 citations70
US4174460ANov 13, 1979
Process for the hydroxylation of phenols and phenol ethers in the nucleus
BAYER AG18 citations70
US6211379B1Apr 3, 2001
Process for preparing heterocyclic compounds
BAYER AG2 citations63
US5162529ANov 10, 1992
Process for the preparation of 5-hydroxy-3,4,5,6-tetrahydro-pyrimidine derivatives
BAYER AG4 citations63
US4182917AJan 8, 1980
Process for the preparation of polyhydric phenols
BAYER AG3 citations63
US4182918AJan 8, 1980
Process for the preparation of polyhydric phenols
BAYER AG3 citations63
US4387252AJun 7, 1983
Process for the preparation of polyhydric phenols
BAYER AG5 citations61
US4344897AAug 17, 1982
Process for the preparation of percarboxylic acid solutions
BAYER AG5 citations61
US6667401B2Dec 23, 2003
Method for producing heterocyclic compounds
BAYER AG1 citations52
US4212809AJul 15, 1980
Process for the preparation of 5-(oxiranylmethyl)-1,3-benzodioxole
BAYER AG0 citations51
US4537730AAug 27, 1985
Preparation of O,S-dimethyl-thiolophosphoric acid amide
BAYER AG0 citations47
DEGUSSA
4 patentsUS4360682ANov 23, 1982
Stabilizing caprolactones with dihydroxybenzenes
DEGUSSA10 citations73
US4088679AMay 9, 1978
Process for the preparation of perpropionic acid solutions
DEGUSSA4 citations62
US4087454AMay 2, 1978
Process for the preparation of perpropionic acid solutions
DEGUSSA3 citations62
US4059619ANov 22, 1977
Process for the preparation of percarboxylic acid solutions
DEGUSSA6 citations62