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USPTO Patent Rankings Data through Dec 31, 2025
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Josef Ritz — 27 Patents

Basf Se: 27 patents #428 of 13,826Top 4%
Ludwigshafen, DE: #99 of 1,722 inventorsTop 6%
Overall (All Time): #142,059 of 4,157,543Top 4%
27 Patents All Time
Josef Ritz has been granted 27 US patents while listed as an inventor at Basf Se. The first was granted in 1985 and the most recent in December 1997. Josef Ritz ranks #142,059 of 4,157,543 US inventors in our database (top 3.4%). Patent records list Josef Ritz in Ludwigshafen, DE.

Patents per Year

Patents granted per year, 1985 to 1997Bar chart with a peak of 3 patents in 1986.peak 31985: 1 patents19851986: 3 patents1987: 1 patents19871988: 3 patents1989: 3 patents19891990: 1 patents1991: 2 patents19911992: 3 patents1993: 2 patents19931994: 2 patents1995: 2 patents19951996: 2 patents1997: 2 patents1997

Issued Patents All Time

Showing 1–25 of 27 patents

Patent #TitleCo-InventorsDate
5700358 Recovery of caprolactam from oligomers and/or polymers of caprolactam Hugo Fuchs, Gerald Neubauer 1997-12-23
5693793 Preparation of caprolactam from 6-aminocapronitrile Eberhard Fuchs, Guido Voit, Gunther Achhammer, Rolf Fischer 1997-12-02
5536831 Obtaining caprolactam by cleavage of molten polycaprolactam Michael Kopietz, Alan Handerman, Simon Jones, Ulrich Kalck, Claus-Ulrich Priester +3 more 1996-07-16
5496941 Process for continuous purification of crude caprolactam prepared from 6-aminocapronitrile Rolf Fischer, Werner Schnurr, Gu/ nther Achhammer, Hermann Luyken, Eberhard Fuchs 1996-03-05
5458740 Process for the purification of crude caprolactam Thomas P. Losier, Donald R. Johnson, Hugo Fuchs, Gerald Neubauer 1995-10-17
5441607 Recovery of caprolactam from distillation residues obtained in the purification of caprolactam Hugo Fuchs, Hans J. Wilfinger, David Weatherford 1995-08-15
5360905 Recovery of caprolactam from oligomers and/or polymers of caprolactam Hugo Fuchs, Claus-Ulrich Priester, Gerald Neubauer, Erwin Brunner, Michael Kopietz 1994-11-01
5359062 Recovery of caprolactam from polycaprolactam Hugo Fuchs, Gerald Neubauer, Claus-Ulrich Priester 1994-10-25
5264571 Preparation of caprolactam by Beckmann rearrangement of cyclohexanone oxime Hugo Fuchs, Gerald Neubauer 1993-11-23
5236685 Preparation of hydroxylammonium salts Hugo Fuchs, Franz-Josef Weiss 1993-08-17
5155081 Platinum-on-graphite catalysts Werner Steigleiter, Wolfgang Hoelderich, Franz-Josef Weiss, Hugo Fuchs, Luc Guns +1 more 1992-10-13
5124138 Work-up of aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxyl-ammonium and ammonium salts Hugo Fuchs, Gerald Neubauer 1992-06-23
5120699 Platinum-on-graphite catalysts and the use thereof Franz-Josef Weiss, Hugo Fuchs, Werner Steigleiter, Wolfgang Hoelderich, Luc Guns +1 more 1992-06-09
5032684 Continuous purification of caprolactam Gerald Neubauer, Hugo Fuchs, David Agar, Rolf Fischer, Uwe Vagt 1991-07-16
4997635 Preparation of crystalline hydroxylammonium sulfate having a low ammonium sulfate content Hugo Fuchs, Gerald Neubauer, Franz-Josef Weiss 1991-03-05
4931592 Storability of molten cyclohexanone oxime Hugo Fuchs, David Agab, Gerald Neubauer 1990-06-05
4889704 Preparation of hydroxylammonium salts Hugo Fuchs, Erwin Thomas, Franz-Josef Weiss 1989-12-26
4882430 Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof Gerald Neubauer, Emile De Decker, Hugo Fuchs, Bernhard Holzknecht 1989-11-21
4814511 Working up cyclohexyl hydroperoxide containing reaction mixtures Gerald Neubauer, Rolf Schnabel, Juergen Hartig 1989-03-21
4778669 Preparation of aqueous solutions of free hydroxylamine Hugo Fuchs, Franz-Josef Weiss, Erwin Thomas 1988-10-18
4737354 Preparation of hydroxylamine-O-sulfonic acid Hugo Fuchs, Franz-Josef Weiss, Erwin Thomas 1988-04-12
4725360 Working up wastewaters containing hydroxylamine or its salts Hugo Fuchs, Erwin Thomas, Franz-Josef Weiss 1988-02-16
4634584 Stabilized solutions of hydroxylamine or its salts in water or alcohols, and their preparation Otto-Alfred Grosskinsky, Elmar Frommer, Erwin Thomas, Franz-Josef Weiss 1987-01-06
4629613 Stabilized solutions of hydroxylamine or its salts in water or alcohols, and their preparation Otto-Alfred Grosskinsky, Elmar Frommer, Erwin Thomas, Franz-Josef Weiss 1986-12-16
4601800 Preparation of aqueous solutions of hydroxylammonium carbonate Franz-Josef Weiss, Wolfgang Habermann, Peter Hammes, Erwin Thomas, Peter Thoma 1986-07-22