Inventor · disambiguated record
Karl Petzoldt
Also filed as: ELGER WALTER · PETZOLDT KARL
33 granted patents·225 citations·filing 1974–1994
97Inventor score
Top patents by PatentIndex Score
33 records- 0188US4435327A3β,7β,15α-Trihydroxy-5-androsten-17-one, its 3,15-dipivalate, and their preparationSCHERING AG·Filed 1982·Granted Mar 6, 1984·29 cites·14 claims
- 0284US4587236ANovel 6α-methylprednisolone derivatives, their preparation, and their useSCHERING AG·Filed 1983·Granted May 6, 1986·22 cites·14 claims
- 0380US4416985AProcess for preparing 3β,7β-dihydroxy-Δ5 -steroidsSCHERING AG·Filed 1981·Granted Nov 22, 1983·19 cites·5 claims
- 0476US4614616AProcess for preparing 3β7β-dihydroxy-Δ5 -steroidsSCHERING AG·Filed 1983·Granted Sep 30, 1986·16 cites·7 claims
- 0574US5539111AProcess for resolution of racemates of 4-aryl-2-oxo-pyrrolidine-3-carboxylic acid estersSCHERING AG·Filed 1993·Granted Jul 23, 1996·16 cites·6 claims
- 0674US4196203ANovel corticoidsSCHERING AG·Filed 1977·Granted Apr 1, 1980·8 cites·5 claims
- 0771US3935245ARadioactively labeled steroid derivativesSCHERING AG·Filed 1974·Granted Jan 27, 1976·14 cites·16 claims
- 0867US4029779A1α-Hydroxy steroidsSCHERING AG·Filed 1975·Granted Jun 14, 1977·6 cites·8 claims
- 0965US4036695AProcess for the preparation of estrene-3,17-dione derivativesSCHERING AG·Filed 1975·Granted Jul 19, 1977·6 cites·11 claims
- 1063US4196204AHydroxylated 1 alpha, 2 alpha-methylene steroidsSCHERING AG·Filed 1978·Granted Apr 1, 1980·6 cites·7 claims
- 1162US4026918AD-homosteroidsFURST ANDOR·Filed 1974·Granted May 31, 1977·9 cites·8 claims
- 1261US4284720AProcess for the preparation of 19-hydroxy steroids of the androstane and pregnane seriesSCHERING AG·Filed 1980·Granted Aug 18, 1981·10 cites·3 claims
- 1359US4144334ANovel α-hydroxy steroidsSCHERING AG·Filed 1977·Granted Mar 13, 1979·4 cites·7 claims
- 1458US4045574AD-homo-20-ketopregnanesSCHERING AG·Filed 1974·Granted Aug 30, 1977·7 cites·23 claims
- 1555US5248609ARacemic separation of 7α-acyloxy-6β-hydroxymethyl-2-oxabicyclo[3.]-octan-3-ones by stereospecific enzymatic acylate hydrolysisSCHERING AG·Filed 1987·Granted Sep 28, 1993·7 cites·11 claims
- 1653US4026921AD-homosteroidsFURST ANDOR·Filed 1974·Granted May 31, 1977·6 cites·31 claims
- 1752US4371529A11-Methylene-Δ15 -steroids, their preparation and use in pharmaceuticalsSCHERING AG·Filed 1981·Granted Feb 1, 1983·6 cites·14 claims
- 1851US4337311A15 Hydroxylation of 1α,2α-methylene steroidsSCHERING AG·Filed 1979·Granted Jun 29, 1982·3 cites·5 claims
- 1950US4011314A7-hydroxyestradiolsSCHERING AG·Filed 1975·Granted Mar 8, 1977·10 cites·28 claims
- 2049US4696948AIndanyl derivatives and process for their preparationSCHERING AG·Filed 1984·Granted Sep 29, 1987·3 cites·6 claims
- 2149US4353985AProcess for the preparation of 11 β-hydroxy steroidsSCHERING AG·Filed 1980·Granted Oct 12, 1982·6 cites·7 claims
- 2248US4330541ANovel corticoid 17-thioacetals, their preparation and useSCHERING AG·Filed 1981·Granted May 18, 1982·3 cites·15 claims
- 2346US4912098AAntiinflammatory 6 alpha-methylhydrocortisonesSCHERING AG·Filed 1987·Granted Mar 27, 1990·3 cites·5 claims
- 2442US4124708ANovel agents and novel methods for inducing abortionsSCHERING AG·Filed 1977·Granted Nov 7, 1978·1 cites·12 claims
- 2540US5102793AStereospecific keto reduction of bicyclooctandione-carboxylic acid esters by microorganismsSCHERING AG·Filed 1987·Granted Apr 7, 1992·1 cites·3 claims
- 2635US4603013AEstrane derivativesSCHERING AG·Filed 1984·Granted Jul 29, 1986·1 cites·8 claims
- 2734US5275936AProcess for the preparation of 1-methyl-1,4-androstadiene-3,17-dioneSCHERING AG·Filed 1992·Granted Jan 4, 1994·1 cites·4 claims
- 2833US4464365A11β-Chloro-Δ15 -steroids, a process for their preparation and pharmaceutical preparations containing themSCHERING AG·Filed 1983·Granted Aug 7, 1984·1 cites·19 claims
- 2932US4894336ARacemic dissociation of 3-acyloxy bicyclo(3.3.0)octan-7-one-2-carboxylic acid esters by stereospecific enzymatic or microbiological acylate hydrolysisSCHERING AG·Filed 1987·Granted Jan 16, 1990·1 cites·10 claims
- 3031US5403724AMicrobiological reduction of prostacyclin intermediate products with a 15-keto groupSCHERING AG·Filed 1994·Granted Apr 4, 1995·0 cites·2 claims
- 3131US5250712A1β,15α-dihydroxy-1α-methyl-5α-androstane-3,17-dione, its production and useSCHERING AG·Filed 1992·Granted Oct 5, 1993·0 cites·1 claims
- 3231US4307088A1-Hydroxy steroids, a process for the production thereof, and pharmaceutical preparations containing themSCHERING AG·Filed 1981·Granted Dec 22, 1981·0 cites·8 claims
- 3330US5093250AProcess for producing optically active bicyclo[3.3.0]octanedione carboxylic acid estersSCHERING AG·Filed 1987·Granted Mar 3, 1992·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →