Inventor · disambiguated record
Freddy Helmer-Metzmann
Also filed as: HELMER-METZMANN FREDDY · HELMER-METZMANN FREDDY DR
17 granted patents·678 citations·filing 1993–2002
95Inventor score
Top patents by PatentIndex Score
17 records- 0198US5438082APolymer electrolyte membrane, and process for the production thereofHOECHST AG·Filed 1993·Granted Aug 1, 1995·199 cites·11 claims
- 0295US5561202APolymer electrolyte membrane, and process for the production thereofHOECHST AG·Filed 1995·Granted Oct 1, 1996·106 cites·11 claims
- 0392US5741408APolymer electrolyte membrane for use in fuel cells and electrolysis cellsHOECHST AG·Filed 1995·Granted Apr 21, 1998·80 cites·4 claims
- 0488US6214488B1Polymer electrolyte membrane and process for the production thereofHOECHST AG·Filed 1997·Granted Apr 10, 2001·55 cites·8 claims
- 0581US5362836APolymer electrolytes and their preparationHOECHST AG·Filed 1993·Granted Nov 8, 1994·48 cites·19 claims
- 0678US5834566AHomogeneous polymer alloys based on sulfonated aromatic polyetherkeytonesHOECHST AG·Filed 1997·Granted Nov 10, 1998·38 cites·18 claims
- 0777US6239187B1Polymer foamsTICONA GMBH·Filed 1996·Granted May 29, 2001·31 cites·24 claims
- 0875US5505851ASemipermeable membranes of homogeneously miscible polymer alloysHOECHST AG·Filed 1993·Granted Apr 9, 1996·37 cites·36 claims
- 0966US6096856APolymer electrolytes and process for their productionHOECHST RES & TECH GMBH & CO·Filed 1996·Granted Aug 1, 2000·31 cites·21 claims
- 1057US5656389AElectrochemical cellHOECHST AG·Filed 1995·Granted Aug 12, 1997·23 cites·3 claims
- 1147US6063949AStereorigid metallocene compoundTARGOR GMBH·Filed 1996·Granted May 16, 2000·7 cites·2 claims
- 1245US6818590B2Method for absorbing contaminantsTICONA GMBH·Filed 2002·Granted Nov 16, 2004·0 cites·11 claims
- 1343US6383396B1Method for absorbing contaminantsTICONA GMBH·Filed 2000·Granted May 7, 2002·0 cites·6 claims
- 1439US5510424AHomogeneous polymer alloys based on sulfonated aromatic polyether ketonesHOECHST AG·Filed 1995·Granted Apr 23, 1996·8 cites·13 claims
- 1537US5853911AElectrochemical cellHOECHST AG·Filed 1997·Granted Dec 29, 1998·7 cites·3 claims
- 1635US6132622AAbsorbentsTICONA GMBH·Filed 1998·Granted Oct 17, 2000·4 cites·19 claims
- 1731US5373081APolyether ketones and polyether sulfones based on phenylindane, and the use thereof for optical systemsHOECHST AG·Filed 1993·Granted Dec 13, 1994·4 cites·15 claims
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