Inventor

WERSHOFEN STEFAN

DE54 patents

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

WERSHOFEN STEFAN

COVESTRO DEUTSCHLAND AG

Process for preparation of di- and polyamines of the diphenylmethane series

Process for preparation of di- and polyamines of the diphenylmethane series

Process for the preparation of di- and polyamines from the diphenylmethane series

Process for preparation of di- and polyamines of the diphenylmethane series

Method for producing isocyanates

Process for the preparation of di- and polyamines of the diphenylmethane series

Method for producing diamines and polyamines of the diphenylmethane series

Process for preparation of di- and polyamines of the diphenylmethane series

Method for producing a composition comprising polycarbodiimide having improved storage stability

Process for the preparation of urethanes

Silica-based zinc catalysts, their preparation and use in the alkoxycarbonylation of amines

Process for the preparation of di- and polyamines of the diphenylmethane series

Method of producing diamines and polyamines of the diphenylmethane series

Method of producing diamines and polyamines of the diphenylmethane series

Method of producing diamines and polyamines of the diphenylmethane series at different production capacities

Method of producing diamines and polyamines of the diphenylmethane series at different production capacities

Process for the production of di- and polyamines of the diphenylmethane series

Zinc cluster compounds and their use as catalysts in the reaction of amines with dialkyl carbonates

Methods for producing chemical products with operation interruptions

BAYER MATERIALSCIENCE AG

Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation

Process for the preparation of di- and polyamines of the diphenylmethane series

Process for preparing aniline

Process for the production of liquid, storage-stable organic isocyanates with a low colour index having carbodiimide- and/or uretone imine groups

Process for the production of light-colored isocyanates

Process for the preparation of liquid, storage-stable organic isocyanates of low color number containing carbodiimide and/or uretonimine groups

Process for the preparation of liquid, storage-stable organic isocyanates containing carbodiimide and/or uretoneimine groups

Method for producing diisocyanates by phosgenating diamine suspensions

Process for controlling a production process

Process for the preparation of di- and polyamines of the diphenylmethane series

Process for the preparation of liquid, storage-stable organic isocyanates containing carbodiimide and/or uretoneimine groups

Process for the preparation of liquid, storage-stable organic isocyanates containing carbodiimide and/or uretonimine groups

BAYER AG

Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralized polyamine of the diphenylmethane series

Process for producing polyisocyanates of the diphenyl methane series having a reduced color value

Process for the preparation of highly pure aromatic diurethanes and/or polyurethanes

Process for the production of poly(O-alkylurethanes) of the diphenyl methane series

Method for producing prepolymers containing isocyanate end groups, incorporating a small proportion of base isocyanates

WERSHOFEN STEFAN

Process for producing diamines and polyamines of the diphenylmethane series

Catalyst for producing N-substituted carbamates, and the preparation and application of the same

Catalyst for the synthesis of organic carbonates, process for preparing the same and application thereof

Process for preparing aromatic carbamates

BAYER IP GMBH

Method for producing isocyanates in the gas phase

Method for producing isocyanates

Method for producing light-coloured polyisocyanates

COVESTRO INTELLECTUAL PROPERTY GMBH & CO KG

Method for producing methylene-diphenylene-diisocyanates and polymethylene-polyphenylene-polyisocyanates

Heterogeneous catalysts for the synthesis of carbamates

COVESTRO LLC

Process for preparing di- and polyamines of the diphenyl methane series

JACOB ANDREAS

Process for the preparation of urethanes

BRUNS RAINER

Method for producing isocyanates in the gas phase

BAYER MATERIALSCIENCE LLC

Process for removing compounds containing phenolic hydroxy groups from aromatic amines

DENG YOUQUAN

Catalyst for the synthesis of alkyl carbamates, the method for preparing the same and the use thereof