Konstantin Ledjeff

Person

Bad Krozingen, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Polymer electrolyte membrane and process for the production thereof
- Patent number 6,214,488
- Issue date Apr 10, 2001
- Hoechst Aktiengesellschaft
- Freddy Helmer-Metzmann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
PEM fuel cell with structured plates
- Patent number 5,952,118
- Issue date Sep 14, 1999
- Fraunhofer-Gesellschaft Zur Foerderung der Angewandten
- Konstantin Ledjeff
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Assembly of single cells to form a diaphragm electrode unit
- Patent number 5,925,477
- Issue date Jul 20, 1999
- Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
- Konstantin Ledjeff
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Polymer electrolyte membrane fuel cell
- Patent number 5,863,672
- Issue date Jan 26, 1999
- Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
- Konstantin Ledjeff
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Battery shaped as a membrane strip containing several cells
- Patent number 5,861,221
- Issue date Jan 19, 1999
- Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
- Konstantin Ledjeff
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Polymer electrolyte membrane for use in fuel cells and electrolysis...
- Patent number 5,741,408
- Issue date Apr 21, 1998
- Hoechst Aktiengesellschaft
- Freddy Helmer-Metzmann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymer fuel cell
- Patent number 5,733,678
- Issue date Mar 31, 1998
- Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
- Konstantin Ledjeff
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrode membrane
- Patent number 5,723,086
- Issue date Mar 3, 1998
- Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
- Konstantin Ledjeff
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Polymer electrolyte membrane, and process for the production thereof
- Patent number 5,561,202
- Issue date Oct 1, 1996
- Hoechst Aktiengesellschaft
- Freddy Helmer-Metzmann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymer electrolyte membrane, and process for the production thereof
- Patent number 5,438,082
- Issue date Aug 1, 1995
- Hoechst Aktiengesellschaft
- Freddy Helmer-Metzmann
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Apparatus for the storage and conversion of energy
- Patent number 5,316,643
- Issue date May 31, 1994
- Fraunhofer Gesellschaft zur Forderung der angewandten Forschund e.v.
- Jochen Ahn
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Rebalance cell for a Cr/Fe redox storage system
- Patent number 5,258,241
- Issue date Nov 2, 1993
- Siemens Aktiengesellschaft
- Konstantin Ledjeff
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Recombination device for storage batteries
- Patent number 4,497,880
- Issue date Feb 5, 1985
- The United States of America as represented by the Department of Energy
- Helmut Kraft
- H01 - BASIC ELECTRIC ELEMENTS

Konstantin Ledjeff

Person

Patents Grantslast 30 patents

Polymer electrolyte membrane and process for the production thereof

PEM fuel cell with structured plates

Assembly of single cells to form a diaphragm electrode unit

Polymer electrolyte membrane fuel cell

Battery shaped as a membrane strip containing several cells

Polymer electrolyte membrane for use in fuel cells and electrolysis...

Polymer fuel cell

Electrode membrane

Polymer electrolyte membrane, and process for the production thereof

Polymer electrolyte membrane, and process for the production thereof

Apparatus for the storage and conversion of energy

Rebalance cell for a Cr/Fe redox storage system

Recombination device for storage batteries