Inventor · disambiguated record
Friedrich Preisser
Also filed as: PREISSER FRIEDRICH
9 granted patents·199 citations·filing 1988–1995
89Inventor score
Top patents by PatentIndex Score
9 records- 0194US5630322AProcess and apparatus for heat treatment of workpieces by quenching with gasesALD VACUUM TECHN GMBH·Filed 1995·Granted May 20, 1997·102 cites·14 claims
- 0285US4867808AHeat treating a metallic workpiece by quenching under cooling gas under above atmospheric pressure and specified circulation rateDEGUSSA·Filed 1988·Granted Sep 19, 1989·22 cites·5 claims
- 0360US5372655AMethod for the treatment of alloy steels and refractory metalsLEYBOLD DURFERRIT GMBH·Filed 1992·Granted Dec 13, 1994·22 cites·7 claims
- 0458US5362031AMethod and apparatus for the automatic monitoring of operating safety and for controlling the progress of the process in a vacuum heat-treatment ovenLEYBOLD DURFRRIT GMBH·Filed 1993·Granted Nov 8, 1994·20 cites·10 claims
- 0545US5211768AMethod of nitriding work pieces of steel under pressureDEGUSSA·Filed 1992·Granted May 18, 1993·12 cites·25 claims
- 0638US4869470AVacuum furnace for heat treatment of metallic workpiecesDEGUSSA·Filed 1988·Granted Sep 26, 1989·8 cites·5 claims
- 0737US5292555AProcess for applying nitride layers to titaniumDEGUSSA·Filed 1992·Granted Mar 8, 1994·6 cites·25 claims
- 0837US5225142AMethod and apparatus for the automatic monitoring of operating safety and for controlling the progress of the process in a vacuum heat-treatment ovenLEYBOLD DURFERRIT GMBH·Filed 1991·Granted Jul 6, 1993·7 cites·5 claims
- 0928US4906330AProcess for the disposal of hardening-shop wastewatersDEGUSSA·Filed 1988·Granted Mar 6, 1990·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →