Inventor
KUEHLING STEFFEN
DE47 patents
⚠️ This page may combine multiple inventors who share the name “KUEHLING STEFFEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
45 patentsUS5340905AAug 23, 1994
Process for the preparation of thermoplastic polycarbonates
BAYER AG242 citations99
US5399659AMar 21, 1995
Two-stage process for the production of thermoplastic polycarbonate
BAYER AG78 citations96
US5384389AJan 24, 1995
Process for the production of polycarbonates
BAYER AG53 citations96
US5783651AJul 21, 1998
Process for the production of poly (diorganosiloxane)/polycarbonate block copolymers
BAYER AG58 citations95
US6586556B2Jul 1, 2003
Use of copolycarbonates
BAYER AG17 citations92
US5856012AJan 5, 1999
Process for the production of multilayer plastic sheets
BAYER AG20 citations92
US5734004AMar 31, 1998
Process for the purification of carbonic acid diaryl ester
BAYER AG28 citations92
US5648437AJul 15, 1997
Process for the manufacture of thermoplastic polycarbonate
BAYER AG51 citations92
US5266716ANov 30, 1993
Process for the splitting of polycarbonates
BAYER AG26 citations92
US6720406B1Apr 13, 2004
High-purity polymer granules and method for the production thereof
BAYER AG20 citations91
US6548691B2Apr 15, 2003
Process for producing carbonic acid diaryl ester
BAYER AG17 citations84
US5652275AJul 29, 1997
Process for the chemical recycling of polycarbonates
BAYER AG18 citations84
US6680400B2Jan 20, 2004
Continuous process for the production of carboxylic acid diaryl esters
BAYER AG16 citations83
US5391802AFeb 21, 1995
Process for cleaving polycarbonates into bisphenols and diaryl carbonates
BAYER AG19 citations82
US6531623B2Mar 11, 2003
Continuous process for producing carbonic acid diaryl ester
BAYER AG15 citations78
US5900501AMay 4, 1999
Process for the continuous production of aryl carbonates
BAYER AG11 citations74
US5739258AApr 14, 1998
Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom
BAYER AG13 citations74
US5652313AJul 29, 1997
Two-stage process for the manufacture of thermoplastic polycarbonate
BAYER AG13 citations74
US5444148AAug 22, 1995
Improved transesterification process for the production of polycarbonates
BAYER AG10 citations74
US5418316AMay 23, 1995
Guanidine-derived catalyts for preparing polycarbonates by transesterification
BAYER AG18 citations74
US5373082ADec 13, 1994
Process for the production of thermoplastic polycarbonates
BAYER AG19 citations74
US6703473B2Mar 9, 2004
Process for producing polycarbonate
BAYER AG9 citations73
US6689464B1Feb 10, 2004
Method and device for producing bisphenol a prills and bisphenol a prills produced according to this method
BAYER AG8 citations73
US6682794B1Jan 27, 2004
Polycarbonate containers
BAYER AG8 citations73
US6646101B2Nov 11, 2003
Use of copolycarbonates
BAYER AG6 citations73
US6414198B1Jul 2, 2002
Method for producing bisphenol-A
BAYER AG8 citations73
US6384288B1May 7, 2002
Method for the production of bis(4-hydroxyaryl)alkanes
BAYER AG7 citations73
US5831111ANov 3, 1998
Process for the continuous production of aryl carbonates
BAYER AG8 citations73
US5767224AJun 16, 1998
Two-step process for the production of thermoplastic polycarbonate
BAYER AG14 citations73
US5440066AAug 8, 1995
Process for splitting polycarbonates
BAYER AG15 citations73
US6395864B1May 28, 2002
Polycarbonates with a low yellowness index
BAYER AG9 citations72
US5710310AJan 20, 1998
Process for the continuous production of diaryl carbonates
BAYER AG4 citations63
US5314985AMay 24, 1994
Molten, catalytic process for the preparation of polycarbonates
BAYER AG4 citations63
US6815524B1Nov 9, 2004
Polycarbonate substrates
BAYER AG4 citations60
US5618906AApr 8, 1997
Process for the production of thermoplastic polycarbonates
BAYER AG5 citations60
US6710154B2Mar 23, 2004
Polycarbonate substrates
BAYER AG3 citations54
US6316678B1Nov 13, 2001
Method for producing dis(4-hydroxyaryl) alkanes
BAYER AG0 citations52
US5756641AMay 26, 1998
Process for producing thermoplastic polycarbonate
BAYER AG1 citations52
US5116918AMay 26, 1992
Crosslinked copolymers based on cyclic esters and carbonates
BAYER AG1 citations52
US5830977ANov 3, 1998
Process for the isolation of partially crystalline polycarbonate powder
BAYER AG0 citations51
US5652324AJul 29, 1997
Process for the production of thermoplastic polycarbonate
BAYER AG0 citations51
US6855794B2Feb 15, 2005
Polycarbonate substrates
BAYER AG0 citations50
US6835798B1Dec 28, 2004
Method of producing polycarbonates
BAYER AG1 citations50
US6696542B1Feb 24, 2004
Polycarbonate substrates
BAYER AG1 citations50
US6855390B1Feb 15, 2005
Optical data carriers and method for producing the same
BAYER AG0 citations40