Inventor
HALLENBERGER KASPAR
DE20 patents
⚠️ This page may combine multiple inventors who share the name “HALLENBERGER KASPAR”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
12 patentsUS5734004AMar 31, 1998
Process for the purification of carbonic acid diaryl ester
BAYER AG28 citations92
US5785823AJul 28, 1998
Process for the purification of bisphenol
BAYER AG32 citations89
US5696295ADec 9, 1997
Method for the preparation of ultra-pure bisphenol A and the use thereof
BAYER AG29 citations89
US6288284B1Sep 11, 2001
Method for producing bis(4-hydroxyaryl)alkanes
BAYER AG17 citations82
US6703473B2Mar 9, 2004
Process for producing polycarbonate
BAYER AG9 citations73
US5523452AJun 4, 1996
Process for preparing dimethyl carbonate
BAYER AG8 citations73
US5562887AOct 8, 1996
Purification of alkyl nitrite-containing exhaust gases
BAYER AG4 citations63
US6673955B2Jan 6, 2004
Preparation of triethyl phosphate
BAYER AG6 citations62
US6437166B1Aug 20, 2002
Method for reprocessing reaction mixtures containing diaryl carbonate
BAYER AG2 citations61
US6420465B1Jul 16, 2002
Process for preparing phosphoric acid esters
BAYER AG3 citations56
US6605191B1Aug 12, 2003
Method for reprocessing reaction mixtures containing diaryl carbonate
BAYER AG1 citations51
US5149890ASep 22, 1992
Process for the isolation of pure dinitrotoluenes
BAYER AG1 citations46
BAYER MATERIALSCIENCE AG
4 patentsUS8039659B2Oct 18, 2011
Processes for preparing diaryl and/or alkylaryl carbonates from dialkyl carbonates
BAYER MATERIALSCIENCE AG2 citations62
US8022240B2Sep 20, 2011
Processes for purifying diaryl carbonates
BAYER MATERIALSCIENCE AG5 citations62
US8003817B2Aug 23, 2011
Process for the preparation of diaryl carbonates or arylalkyl carbonates from dialkyl carbonates
BAYER MATERIALSCIENCE AG1 citations51
US9765012B2Sep 19, 2017
Method for producing diaryl carbonate
BAYER MATERIALSCIENCE AG0 citations47