Herbert Helfert

Person

Frankenthal, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Method for processing pyrollidone and n-vinyl pyrollidone residues
- Patent number 6,888,006
- Issue date May 3, 2005
- BASF Aktiengesellschaft
- Herbert Helfert
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for obtaining pure n-vinyl pyrrolidone
- Patent number 6,703,511
- Issue date Mar 9, 2004
- BASF Aktiengesellschaft
- Bernd Eck
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Prevention of spontaneous decomposition of gaseous acetylene
- Patent number 5,948,945
- Issue date Sep 7, 1999
- BASF Aktiengesellschaft
- Rudolf Erich Lorenz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of monovinyl ethers
- Patent number 5,723,685
- Issue date Mar 3, 1998
- BASF Aktiengesellschaft
- Marc Heider
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification of N-vinylpyrrolidone by crystallization
- Patent number 5,710,284
- Issue date Jan 20, 1998
- BASF Aktiengesellschaft
- Martin Schmidt-Radde
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Binding chemical impurities contained in crude N-vinylpyrrolid-2-one
- Patent number 5,461,159
- Issue date Oct 24, 1995
- BASF Aktiengesellschaft
- Brigitta Huckestein
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Lubricants for shaping polyvinyl chloride, which contain esterified...
- Patent number 4,614,604
- Issue date Sep 30, 1986
- BASF Aktiengesellschaft
- Herbert Helfert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Linear polyalkylene ether glycols of high molecular weight
- Patent number 4,275,244
- Issue date Jun 23, 1981
- BASF Wyandotte Corporation
- Herbert Helfert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Solid cold bleach activators for detergents and cleaning agents con...
- Patent number 4,207,199
- Issue date Jun 10, 1980
- BASF Aktiengesellschaft
- Johannes Perner
- C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Information Patent Grant
Process for suppressing the foaming of detergents
- Patent number 4,151,127
- Issue date Apr 24, 1979
- BASF Aktiengesellschaft
- Johannes Perner
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Polyether polyols and method of preparing same
- Patent number 4,113,785
- Issue date Sep 12, 1978
- BASF Wyandotte Corporation
- Herbert Helfert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
Method for obtaining pure n-vinyl pyrrolidone
- Publication number 20030166947
- Publication date Sep 4, 2003
- Bernd Eck
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Method for processing pyrollidone and n-vinyl pyrollidone residues
- Publication number 20030105338
- Publication date Jun 5, 2003
- Herbert Helfert
- C07 - ORGANIC CHEMISTRY

Herbert Helfert

Person

Patents Grantslast 30 patents

Method for processing pyrollidone and n-vinyl pyrollidone residues

Method for obtaining pure n-vinyl pyrrolidone

Prevention of spontaneous decomposition of gaseous acetylene

Preparation of monovinyl ethers

Purification of N-vinylpyrrolidone by crystallization

Binding chemical impurities contained in crude N-vinylpyrrolid-2-one

Lubricants for shaping polyvinyl chloride, which contain esterified...

Linear polyalkylene ether glycols of high molecular weight

Solid cold bleach activators for detergents and cleaning agents con...

Process for suppressing the foaming of detergents

Polyether polyols and method of preparing same

Patents Applicationslast 30 patents

Method for obtaining pure n-vinyl pyrrolidone

Method for processing pyrollidone and n-vinyl pyrollidone residues