Inventor · disambiguated record
David M. Tschaen
Also filed as: TSCHAEN DAVID · TSCHAEN DAVID M
31 granted patents·2 pending applications·179 citations·filing 1990–2014
96Inventor score
Top patents by PatentIndex Score
33 records- 0181US6127573AOxidaton of primary alcohols to carboxylic acids with a TEMPO catalyst using NaClO2 and NaClOMERCK & CO INC·Filed 1999·Granted Oct 3, 2000·27 cites·13 claims
- 0278US6605720B1Process for making spirolactone compoundsMERCK & CO INC·Filed 2003·Granted Aug 12, 2003·8 cites·13 claims
- 0378US5688974AProcess for the preparation of an endothelin antagonistMERCK & CO INC·Filed 1996·Granted Nov 18, 1997·23 cites·30 claims
- 0470US5840924AProcess of preparing phenyl heterocycles useful as COX-2 inhibitorsMERCK & CO INC·Filed 1997·Granted Nov 24, 1998·29 cites·12 claims
- 0568US6031101AOxidation process using tempoMERCK & CO INC·Filed 1999·Granted Feb 29, 2000·15 cites·15 claims
- 0667US5585504AProcess of making cox-2 inhibitors having a lactone bridgeMERCK & CO INC·Filed 1994·Granted Dec 17, 1996·23 cites·14 claims
- 0765US5292946AIn-situ preparation of diisopinocamphenyl chloroboraneMERCK & CO INC·Filed 1992·Granted Mar 8, 1994·10 cites·4 claims
- 0864US6559299B2Preparation and isolation of indolocarbazole glycosidesMERCK & CO INC·Filed 2002·Granted May 6, 2003·2 cites·12 claims
- 0963US7368569B2Process for making spirolactone compoundsMERCK & CO INC·Filed 2003·Granted May 6, 2008·2 cites·10 claims
- 1062US7482449B2Process for making spirolactone compoundsMERCK & CO INC·Filed 2008·Granted Jan 27, 2009·0 cites·32 claims
- 1160US6479672B1Diastereoselective preparation of Michael adductsMERCK & CO INC·Filed 2000·Granted Nov 12, 2002·2 cites·10 claims
- 1260US5446158AProcess for synthesis of FK-506 and tricarbonyl intermediatesMERCK & CO INC·Filed 1990·Granted Aug 29, 1995·7 cites·10 claims
- 1353US5849914ACompounds formed by an asymmetric conjugate addition reactionMERCK & CO INC·Filed 1997·Granted Dec 15, 1998·6 cites·2 claims
- 1452US5708186AStereoselective processMERCK & CO INC·Filed 1996·Granted Jan 13, 1998·5 cites·7 claims
- 1550US9598397B2Process for making reverse transcriptase inhibitorsMERCK SHARP & DOHME·Filed 2014·Granted Mar 21, 2017·0 cites·23 claims
- 1645US5998625AAsymmetric conjugate addition reaction using a chiral additiveMERCK & CO INC·Filed 1998·Granted Dec 7, 1999·3 cites·18 claims
- 1745US2004116688A1Preparation and isolation of indolocarbazole glycosidesFiled 2002·Application pending·0 cites
- 1841US5786515ASynthesis of α-chloro or fluoro ketonesMERCK & CO INC·Filed 1996·Granted Jul 28, 1998·2 cites·8 claims
- 1940US6172231B1Oxidation process using periodic acidMERCK & CO INC·Filed 1999·Granted Jan 9, 2001·2 cites·12 claims
- 2039US6353110B1Asymmetric conjugate addition reactionMERCK & CO INC·Filed 1999·Granted Mar 5, 2002·1 cites·11 claims
- 2138US2002107391A1Process for the synthesis of an endothelin receptor antagonistFiled 2001·Application pending·0 cites
- 2237US5962688AStereoselective deoxygenation reactionMERCK & CO INC·Filed 1997·Granted Oct 5, 1999·1 cites·23 claims
- 2337US5484923AProcess of making spirocycles and analogs thereofMERCK & CO INC·Filed 1994·Granted Jan 16, 1996·1 cites·2 claims
- 2437US5124448ADeblocking process for allyl esters with regeneratable polymer supported Pd(O)MERCK & CO INC·Filed 1990·Granted Jun 23, 1992·5 cites·12 claims
- 2536US6150554AOxidation process using periodic acidMERCK & CO INC·Filed 1999·Granted Nov 21, 2000·3 cites·10 claims
- 2635US5574186AEnantioselective synthesis of cyclic amino alcoholsMERCK & CO INC·Filed 1995·Granted Nov 12, 1996·2 cites·7 claims
- 2732US6022972APyridine propanoic acid derivativesMERCK & CO INC·Filed 1998·Granted Feb 8, 2000·0 cites·2 claims
- 2832US5856519AChiral auxilary for stereoselective alkylationsMERCK & CO INC·Filed 1997·Granted Jan 5, 1999·0 cites·1 claims
- 2931US6121026AEnantioselective bioreduction using yeastMERCK & CO INC·Filed 1999·Granted Sep 19, 2000·0 cites·2 claims
- 3030US6172235B1Asymmetric conjugate addition reactionMERCK & CO INC·Filed 1997·Granted Jan 9, 2001·0 cites·31 claims
- 3130US5145957AStereoselective synthesis of a chiral cis 3-beta hydrogen (3R) 4-aroyloxy azetidinoneMERCK & CO INC·Filed 1992·Granted Sep 8, 1992·0 cites·10 claims
- 3229US6046327APhosphate-mediated cyclizationMERCK & CO INC·Filed 1999·Granted Apr 4, 2000·0 cites·12 claims
- 3323US5464762AAsymmetric bioreduction of 6-bromo-2-tetralone to (s)-6-bromo-2 tetraol by trichosporon capitatumMERCK & CO INC·Filed 1994·Granted Nov 7, 1995·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →