Hartmut Hetzel

Person

Cologne, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Process for the isomeric separation of isocyanates
- Patent number 6,271,414
- Issue date Aug 7, 2001
- Bayer Aktiengesellschaft
- Rüdiger Drope
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process and device for continuous evaporation to dryness of viscous...
- Patent number 5,817,211
- Issue date Oct 6, 1998
- Bayer Aktiengesellschaft
- Clemens Casper
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process and a device for separating a solid residue from its soluti...
- Patent number 5,609,735
- Issue date Mar 11, 1997
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Continuous process for preparing aromatic amines
- Patent number 5,563,296
- Issue date Oct 8, 1996
- Bayer Aktiengesellschaft
- Uwe J. Zarnack
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Candle precoated filter for residual volume filtration
- Patent number 5,384,034
- Issue date Jan 24, 1995
- DrM, Dr. Muller AG
- Hartmut Hetzel
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Filtering device with agitator
- Patent number 4,992,171
- Issue date Feb 12, 1991
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for removing alkaline catalysts from polyether polyols
- Patent number 4,482,750
- Issue date Nov 13, 1984
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for separating polyurethane hydrolyzates into polyether and...
- Patent number 4,399,236
- Issue date Aug 16, 1983
- Bayer Aktiengesellschaft
- Georg Niederdellmann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method for evaporating solvents and reacting components in compound...
- Patent number 4,241,043
- Issue date Dec 23, 1980
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Process for the preparation of polyisocyanates which contain biuret...
- Patent number 4,147,714
- Issue date Apr 3, 1979
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the purification of polyethers using a tubular coil eva...
- Patent number 4,143,072
- Issue date Mar 6, 1979
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Screw machine for the continuous degradation of plastics
- Patent number 4,136,967
- Issue date Jan 30, 1979
- Bayer Aktiengesellschaft
- Ernst Grigat
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Hartmut Hetzel

Person

Patents Grantslast 30 patents

Process for the isomeric separation of isocyanates

Process and device for continuous evaporation to dryness of viscous...

Process and a device for separating a solid residue from its soluti...

Continuous process for preparing aromatic amines

Candle precoated filter for residual volume filtration

Filtering device with agitator

Process for removing alkaline catalysts from polyether polyols

Process for separating polyurethane hydrolyzates into polyether and...

Method for evaporating solvents and reacting components in compound...

Process for the preparation of polyisocyanates which contain biuret...

Process for the purification of polyethers using a tubular coil eva...

Screw machine for the continuous degradation of plastics