Inventor · disambiguated record
Helmut Karn
Also filed as: KARN HELMUT · WETZLER MATTHIAS
7 granted patents·35 citations·filing 1975–1989
82Inventor score
Technology areasC07D
Files withBASF AG7
Top patents by PatentIndex Score
7 records- 0181US4021442AProduction of 1-alkyl-5-nitroimidazolesBASF AG·Filed 1975·Granted May 3, 1977·12 cites·5 claims
- 0268US5008398APreparation of p-nitrophenyl-imidazolesBASF AG·Filed 1989·Granted Apr 16, 1991·8 cites·6 claims
- 0368US4866183APreparation of hexaarylbisimidazolesBASF AG·Filed 1987·Granted Sep 12, 1989·8 cites·8 claims
- 0455US4864030APreparation of 1-alkylimidazolesBASF AG·Filed 1988·Granted Sep 5, 1989·4 cites·4 claims
- 0545US4278801APreparation of 5-hydroxymethylimidazolesBASF AG·Filed 1980·Granted Jul 14, 1981·2 cites·4 claims
- 0644US4242517AProcess for preparing 4-methyl-5[(2-aminoethyl)thiomethyl)]-imidazoleBASF AG·Filed 1979·Granted Dec 30, 1980·1 cites·1 claims
- 0735US4239895AProcess for producing 1-hydroxymethylimidazolesBASF AG·Filed 1979·Granted Dec 16, 1980·0 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Helmut Karn files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →