Helmut Dahl — 13 Patents at Schering

Helmut Dahl has been granted 13 US patents while listed as an inventor at Schering. The first was granted in 1980 and the most recent in January 2003. Helmut Dahl ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Helmut Dahl in Berlin, DE.

Patents per Year

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Showing 1–13 of 13 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6512139	Oxidation inhibitors in prostane derivatives	Torsten Wagner, Martin Wessel, Ralph Lipp, Bernd Iffert, Heinrich Michel +2 more	2003-01-28	$982,000
5403724	Microbiological reduction of prostacyclin intermediate products with a 15-keto group	Karl Petzoldt, Werner Skuballa	1995-04-04
5248609	Racemic separation of 7.alpha.-acyloxy-6.beta.-hydroxymethyl-2-oxabicyclo[3.]-octan-3-ones by stereospecific enzymatic acylate hydrolysis	Karl Petzoldt	1993-09-28
5200530	Keto reduction of carbacyclin intermediates	Gabriela Buttner, Dieter Peschel	1993-04-06
5102793	Stereospecific keto reduction of bicyclooctandione-carboxylic acid esters by microorganisms	Karl Petzoldt, Helmut Vorbruggen	1992-04-07
5010065	Cyclodextrin clathrates of 5-cyanoprostacyclin derivatives and their use as pharmaceutical agents	Werner Skuballa, Helmut Vorbrueggen, Olaf Loge, Karl-Heinz Thierauch	1991-04-23
4925956	Novel process for manufacturing optically active carbacyclin intermediates	Werner Skuballa	1990-05-15
4894336	Racemic dissociation of 3-acyloxy bicyclo(3.3.0)octan-7-one-2-carboxylic acid esters by stereospecific enzymatic or microbiological acylate hydrolysis	Karl Petzoldt, Werner Skuballa	1990-01-16
4894391	Novel prostacyclin derivatives, process for the preparation thereof, and use thereof as medicinal agents	Werner Skuballa, Bernd Raduchel, Helmut Vorbruggen, Olaf Loge	1990-01-16
4886788	Cyclodextrin clathrates of carbacyclin derivatives and their use as medicinal agents	Werner Skuballa, Helmut Vorbrueggen, Claus-Steffen Stuerzebecher, Karl-Heinz Thierauch	1989-12-12
4247635	Microbiological reduction of 15-ketoprostaglandin intermediates	Klaus Kieslich, Bernd Raduchel, Werner Skubalia, Helmut Vorbruggen	1981-01-27
4224320	Novel steroids of the pregnane series, substituted in the 17-position, their manufacture and their use	Ernst Schottle, Reinhold Wieske, Alfred Weber, Mario Kennecke	1980-09-23
4207316	Novel 17-substituted 11 .beta.-hydroxy steroids of the pregnane series, their manufacture, preparation and use	Ernst Schottle, Alfred Weber, Mario Kennecke, Joachim-Friedrich Kapp, Hans Wendt +3 more	1980-06-10

Helmut Dahl — 13 Patents

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