Gerhard Fennhoff

Person

Willich, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Method for conditioning ion exchangers
- Patent number 6,723,881
- Issue date Apr 20, 2004
- Bayer Aktiengesellschaft
- Michael Bödiger
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Bisphenol production
- Patent number 6,723,885
- Issue date Apr 20, 2004
- Bayer Aktiengesellschaft
- Frieder Heydenreich
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the manufacture of bis(4-hydroxyaryl)alkanes
- Patent number 6,486,363
- Issue date Nov 26, 2002
- Bayer Aktiengesellschaft
- Klaus Berg
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing dis(4-hydroxyaryl) alkanes
- Patent number 6,316,678
- Issue date Nov 13, 2001
- Bayer Aktiengesellschaft
- Steffen Kühling
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for continuous production of dihydroxydiarylalkanes
- Patent number 6,307,111
- Issue date Oct 23, 2001
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing bis(4-hydroxyaryl)alkanes
- Patent number 6,288,284
- Issue date Sep 11, 2001
- Bayer Aktiengesellschaft
- Rob Eek
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing and purifying 3-(4-Hydroxyphenyl)-1, 1,3-trime...
- Patent number 6,268,538
- Issue date Jul 31, 2001
- Bayer Aktiengesellschaft
- Stefan Westernacher
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for processing mother liquors from the production of bisphenol
- Patent number 6,191,316
- Issue date Feb 20, 2001
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the purification of polycarbonate and polyester carbona...
- Patent number RE36432
- Issue date Dec 7, 1999
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- 528 - Synthetic resins or natural rubbers
Information Patent Grant
Bisphenol synthesis on modified ion-exchange resins using specially...
- Patent number 5,780,690
- Issue date Jul 14, 1998
- Bayer Aktiengesellschaft
- Klaus Berg
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
(Co)polycarbonates stabilized against .gamma.-radiation
- Patent number 5,773,491
- Issue date Jun 30, 1998
- Bayer AG
- Wolfgang Ebert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the production of bisphenols with the use of new cocata...
- Patent number 5,698,600
- Issue date Dec 16, 1997
- Bayer AG
- Claus Wulff
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
(Co)polycarbonates stabilised against .gamma.-radiation
- Patent number 5,684,062
- Issue date Nov 4, 1997
- Bayer AG
- Wolfgang Ebert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Radiation-resistant polycarbonates
- Patent number 5,612,398
- Issue date Mar 18, 1997
- Bayer AG
- Gerhard Fennhoff
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Radiation-resistant polycarbonates
- Patent number 5,464,893
- Issue date Nov 7, 1995
- Bayer Aktiengesellschaft
- Rick L. Archey
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the purification of polycarbonate and polyester carbona...
- Patent number 5,420,241
- Issue date May 30, 1995
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Method of preparing aliphatic-aromatic polycarbonates
- Patent number 5,410,014
- Issue date Apr 25, 1995
- Bayer Aktiengesellschaft
- Wilfried Haese
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the production of aliphatic-aromatic polycarbonates
- Patent number 5,408,027
- Issue date Apr 18, 1995
- Bayer Aktiengesellschaft
- Wilfried Haese
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Stabilized, flame resistant polycarbonate moulding compounds
- Patent number 5,399,600
- Issue date Mar 21, 1995
- Bayer AG
- Hans-Josef Buysch
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polycarbonate/ABS molding compounds
- Patent number 5,393,835
- Issue date Feb 28, 1995
- Bayer Aktiengesellschaft
- Thomas Eckel
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polycondensates which can be sterilized by .gamma.-radiation
- Patent number 5,382,605
- Issue date Jan 17, 1995
- Miles Inc.
- Douglas G. Powell
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Heat stabilization or aromatic polycarbonates
- Patent number 5,376,715
- Issue date Dec 27, 1994
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of preparing polycarbonates and polyester carbonates
- Patent number 5,357,028
- Issue date Oct 18, 1994
- Bayer Aktiengesellschaft
- Ralf Pakull
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the production of bisphenols
- Patent number 5,302,774
- Issue date Apr 12, 1994
- Bayer Aktiengesellschaft
- Klaus Berg
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of ethers of diphenols
- Patent number 5,288,923
- Issue date Feb 22, 1994
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification of polycarbonate, polyester carbonate or polyester waste
- Patent number 5,214,072
- Issue date May 25, 1993
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Carbonates, their production and their use as flow aids
- Patent number 5,162,411
- Issue date Nov 10, 1992
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Aromatic polycarbonate containing a special fluorine-containing bis...
- Patent number 5,155,205
- Issue date Oct 13, 1992
- Bayer Aktiengesellschaft
- Wolfgang Ebert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Purification of polycarbonate and polyester carbonate waste
- Patent number 5,151,452
- Issue date Sep 29, 1992
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Gerhard Fennhoff

Person

Patents Grantslast 30 patents

Method for conditioning ion exchangers

Bisphenol production

Process for the manufacture of bis(4-hydroxyaryl)alkanes

Method for producing dis(4-hydroxyaryl) alkanes

Method for continuous production of dihydroxydiarylalkanes

Method for producing bis(4-hydroxyaryl)alkanes

Method for producing and purifying 3-(4-Hydroxyphenyl)-1, 1,3-trime...

Method for processing mother liquors from the production of bisphenol

Process for the purification of polycarbonate and polyester carbona...

Bisphenol synthesis on modified ion-exchange resins using specially...

(Co)polycarbonates stabilized against .gamma.-radiation

Process for the production of bisphenols with the use of new cocata...

(Co)polycarbonates stabilised against .gamma.-radiation

Radiation-resistant polycarbonates

Radiation-resistant polycarbonates

Process for the purification of polycarbonate and polyester carbona...

Method of preparing aliphatic-aromatic polycarbonates

Process for the production of aliphatic-aromatic polycarbonates

Stabilized, flame resistant polycarbonate moulding compounds

Polycarbonate/ABS molding compounds

Polycondensates which can be sterilized by .gamma.-radiation

Heat stabilization or aromatic polycarbonates

Method of preparing polycarbonates and polyester carbonates

Process for the production of bisphenols

Preparation of ethers of diphenols

Purification of polycarbonate, polyester carbonate or polyester waste

Carbonates, their production and their use as flow aids

Aromatic polycarbonate containing a special fluorine-containing bis...

Purification of polycarbonate and polyester carbonate waste