Inventor · disambiguated record
Helmut Wurfel
Also filed as: WUERFEL HELMUT · WURFEL HELMUT
8 granted patents·38 citations·filing 1976–1986
84Inventor score
Top patents by PatentIndex Score
8 records- 0144US4123348AProcess for catalytic hydrogenation of coalSAARBERGWERKE AG·Filed 1976·Granted Oct 31, 1978·7 cites·5 claims
- 0236US4421632AProcess for hydrogenation of coalWUERFEL HELMUT·Filed 1980·Granted Dec 20, 1983·8 cites·11 claims
- 0335US4689139AProcess for the hydrogenation of coalGFK KOHLEVERFLUESSIGUNG GMBH·Filed 1986·Granted Aug 25, 1987·6 cites·17 claims
- 0433US4946583AProcess for the liquefaction of coalGFK KOHLEVERFLUESSIGUNG GMBH·Filed 1985·Granted Aug 7, 1990·7 cites·18 claims
- 0533US4257870AProcess for the purification of undistillable solid-containing hydrocarbon fractions produced in coal-refiningSAARBERGWERKE AG·Filed 1979·Granted Mar 24, 1981·3 cites·10 claims
- 0628US4492623AProcess for the hydrogenation of coal using a split feedGFK KOHLEVERFLUESSIGUNG GMBH·Filed 1981·Granted Jan 8, 1985·3 cites·6 claims
- 0728US4123349ASeparation of solids containing residues from liquid fractions of a coal hydrogenation process using an expansion engine and a pressure release meansSAARBERGWERKE AG·Filed 1977·Granted Oct 31, 1978·1 cites·8 claims
- 0827US4214974AProcess for hydrogenation of coalWURFEL HELMUT·Filed 1978·Granted Jul 29, 1980·3 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →