Leverkusen
Germany
43
2025-06-26
The entities that hold a legal rights for patent applications filed by inventor Steffens Friedhelm:
Friedhelm Steffens from Leverkusen, DE has applied for patents for these inventions. The list has both pending applications and granted patents:
METHOD FOR THE PURIFICATION OF ANILINE
#2 | 2024-10-17Obtaining Aliphatic Amines from Compositions
#3 | 2024-10-10Method for the Removal of Water from and Transport of Aliphatic Diamines
#4 | 2024-03-28PROCESS FOR RECOVERING RAW MATERIALS FROM POLYURETHANE FOAMS
#5 | 2023-11-09METHOD FOR RECOVERING RAW MATERIALS FROM POLYURETHANE PRODUCTS
#6 | 2022-11-03METHOD FOR THE PURIFICATION OF ANILINE
#7 | 2022-08-11Method for recovering raw materials from polyurethane products
#8 | 2020-04-23Aniline purification process
#9 | 2020-01-30Distributor device, in particular for falling film evaporators, and use thereof
#10 | 2019-06-27Method and a system for separating and treating impurities from a hydrogen chloride liquid mixture
#11 | 2019-01-31Method for producing TDI-trimerisates with high purity
#12 | 2018-12-27Method for producing isocyanates
#13 | 2018-11-08Distillation column and use thereof for cleaning isocyanates
#14 | 2018-07-12Method for producing isocyanates
#15 | 2018-07-05Process for purifying raw-material gases by fractionation
#16 | 2017-04-13Method for operating a gas-phase phosgenation plant
#17 | 2017-04-06Process for operating a gas phase phosgenation plant
#18 | 2016-06-09Process for obtaining organic isocyanates from distillation residues from isocyanate preparation
#19 | 2016-06-02Method for producing isocyanates
#20 | 2016-04-07Process for purifying raw-material gases by fractionation
#21 | 2016-02-04Method for producing TDI-trimerisates with high purity
#22 | 2016-01-21Method for producing light-coloured TDI-polyisocyanates
#23 | 2015-12-24Process for separating an isocyanate prepared by phosgenation of a primary amine in the gas phase from the gaseous crude product of the phosgenation
#24 | 2015-06-18Device and method for producing phosgene
#25 | 2015-05-07Method for working up distillation residues from isocyanate production
#26 | 2012-05-17Process for the preparation of isocyanates
#27 | 2011-01-27Process for the preparation of toluene-diisocyanate
#28 | 2010-06-24Process for the preparation of isocyanates in the gas phase
#29 | 2010-06-24PROCESS FOR THE PREPARATION OF ISOCYANATES IN THE GAS PHASE
#30 | 2010-06-17Process for the preparation of isocyanates in the gas phase
#31 | 2010-03-25Method for dividing fluid streams
#32 | 2009-08-20Process for the preparation of isocyanates
#33 | 2009-07-07Process for purification of anhydrous hydrogen chloride gas
#34 | 2009-06-11Process for the production of aromatic diisocyanates in the gas
#35 | 2008-07-10Process for the preparation of isocyanates in the gas phase
#36 | 2008-06-19Process for the preparation of toluenediamines by catalytic hydrogenation of dinitrotoluenes
#37 | 2008-06-19Process for the preparation of toluene-diisocyanate
#38 | 2008-06-19Process for the preparation of isocyanates in the gas phase
#39 | 2007-12-13Process for the production of toluene diisocyanate
#40 | 2006-12-07Data processing system and method for regulating an installation
#41 | 2006-10-10Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column
#42 | 2006-02-23Stirring device and process for carrying out a gas-liquid reaction
#43 | 2005-12-01Process for the distillative separation of aqueous amine solutions
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