Inventor · disambiguated record
Erich Fretschner
Also filed as: FRETSCHNER ERICH
13 granted patents·78 citations·filing 1990–2001
89Inventor score
Files withBASF AG13
Top patents by PatentIndex Score
13 records- 0182US4996327APreparation of pyrazole and its derivativesBASF AG·Filed 1990·Granted Feb 26, 1991·24 cites·5 claims
- 0274US5569769APreparation of pyrazole and its derivativesBASF AG·Filed 1994·Granted Oct 29, 1996·15 cites·6 claims
- 0368US5744614APreparation of 3,5-diarylpyrazolesBASF AG·Filed 1996·Granted Apr 28, 1998·13 cites·5 claims
- 0465US6515139B1Method for producing N-substituted 2-pyrazoline-5-oneBASF AG·Filed 2000·Granted Feb 4, 2003·3 cites·6 claims
- 0562US6229022B1Method for producing substituted pyrazolesBASF AG·Filed 1998·Granted May 8, 2001·9 cites·7 claims
- 0656US5939584AProcess for preparing solid, free-flowing water-soluble salts of aryloxy-C1 -C4 -alkanecarboxylic acidsBASF AG·Filed 1995·Granted Aug 17, 1999·9 cites·6 claims
- 0756US5128480APreparation of 3-methylpyrazoleBASF AG·Filed 1991·Granted Jul 7, 1992·5 cites·4 claims
- 0841US7002023B2Method for producing 1 substituted 5-chloro-4 methly pyrazolesBASF AG·Filed 2001·Granted Feb 21, 2006·0 cites·11 claims
- 0934US6538135B1Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6)BASF AG·Filed 2000·Granted Mar 25, 2003·0 cites·5 claims
- 1031US5847154AMethod of preparing 1,2-dimethyl-3,5-diarylpyrazolium methylsulfatesBASF AG·Filed 1996·Granted Dec 8, 1998·0 cites·4 claims
- 1130US5840913AProcess for preparing N-substituted pyrazolesBASF AG·Filed 1996·Granted Nov 24, 1998·0 cites·13 claims
- 1230US5763659APreparation of optically active 2-halopropionic acidsBASF AG·Filed 1996·Granted Jun 9, 1998·0 cites·11 claims
- 1327US6252069B1Method for the production of 3-isopropyl-1H-2, 1,3-benzothiadiazine-4 (3H)-one-2,2-dioxideBASF AG·Filed 1998·Granted Jun 26, 2001·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →