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USPTO Patent Rankings Data through Dec 31, 2025
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Norbert Sendhoff — 11 Patents

Basf Se: 11 patents #1,483 of 13,826Top 15%
Havelsee, DE: #13 of 67 inventorsTop 20%
Overall (All Time): #435,149 of 4,157,543Top 15%
11 Patents All Time
Norbert Sendhoff has been granted 11 US patents while listed as an inventor at Basf Se. The first was granted in 1991 and the most recent in February 2004. Norbert Sendhoff ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Norbert Sendhoff in Havelsee, DE.

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6693191 Method for the production of a particle-containing preparation of tetrahydro-3,5-dimethyl-1,3,5-thiadiazin-2-thione Heinz Isak, Franz Schutz, Jörg Therre, Michael Drogemuller, Dirk Franke +3 more 2004-02-17 $1,239,000
6410042 Plant protection products in the form of a granulate with controlled release of the active agent Manfred Schroeder, Reiner Kober, Reinhold Stadler, Jorn Tidow, Erich Probeck 2002-06-25 $235,000
5624748 Packaging materials having barrier properties against oxygen Erich Penzel, Hermann Seyffer, Eberhard Beckmann 1997-04-29
5554261 Dyeing of paper Claudia Nilz, Walter Breitschaft, Manfred Zillig, Primoz Lorencak 1996-09-10
5554718 Catonic urea/formaldehyde resins, their preparation and their use in the paper industry Klaus Flory, Andreas Stange, Michael Kroener 1996-09-10
5478656 Cationic urea/formaldehyde resins, their preparation and their use in the paper industry Klaus Flory, Andreas Stange, Michael Kroener 1995-12-26
5290880 Preparation of finely divided, water-soluble polymers containing vinylamine units Dietmar Moench, Michael Kroener, Enrique Freudenberg, Heinrich Hartmann 1994-03-01
5145559 Production of paper, board and cardboard Werner Auhorn, Friedrich Linhart, Primoz Lorencak, Michael Kroener, Walter Denzinger +1 more 1992-09-08
5126395 Preparation of stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides Lutz End, Walter Denzinger, Michael Kroener, Enrique Freudenberg, Friedrich Linhart +2 more 1992-06-30
5098521 Production of paper, board and cardboard from paper stocks containing foreign materials Enrique Freudenberg, Friedrich Linhart, Rainer Tresch, Heinrich Hartmann, Walter Denzinger +1 more 1992-03-24
5008321 Preparation of stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides and their use Heinrich Hartmann, Walter Denzinger, Michael Kroener, Enrique Freudenberg 1991-04-16