Inventor · disambiguated record
Fred Apffel
Also filed as: APFFEL FRED · APFFEL FRED P · HAYES BOBBY L
12 granted patents·880 citations·filing 1978–1989
94Inventor score
Top patents by PatentIndex Score
12 records- 0197US5057189ARecovery apparatusAPFFEL FRED·Filed 1989·Granted Oct 15, 1991·110 cites·5 claims
- 0297US4861360ACarbon dioxide absorption methanol processFLEXIVOL INC·Filed 1987·Granted Aug 29, 1989·121 cites·29 claims
- 0396US4647443ARecovery processAPFFEL FRED·Filed 1985·Granted Mar 3, 1987·126 cites·35 claims
- 0494US4675035ACarbon dioxide absorption methanol processAPFFEL FRED P·Filed 1986·Granted Jun 23, 1987·106 cites·34 claims
- 0594US4284616AProcess for recovering carbon black and hydrocarbons from used tiresINTENCO INC·Filed 1979·Granted Aug 18, 1981·152 cites·37 claims
- 0692US4839151ARecovery processAPFFEL FRED·Filed 1987·Granted Jun 13, 1989·63 cites·31 claims
- 0792US4250158AProcess for recovering carbon black and hydrocarbons from used tiresINTENCO INC·Filed 1978·Granted Feb 10, 1981·80 cites·30 claims
- 0888US4738699AProcess for recovering ethane, propane and heavier hydrocarbons from a natural gas streamFLEXIVOL INC·Filed 1985·Granted Apr 19, 1988·53 cites·20 claims
- 0987US4584006AProcess for recovering propane and heavier hydrocarbons from a natural gas streamFLEXIVOL INC·Filed 1983·Granted Apr 22, 1986·25 cites·6 claims
- 1069US4597788AProcess for recovering ethane, propane and heavier hydrocarbons from a natural gas streamFLEXIVOL INC·Filed 1984·Granted Jul 1, 1986·22 cites·2 claims
- 1150US4456460AProcess for recovering ethane, propane and heavier hydrocarbons from a natural gas streamFLEXIVOL INC·Filed 1982·Granted Jun 26, 1984·11 cites·5 claims
- 1248US4767428ANitrogen removal systemFLEXIVOL INC·Filed 1986·Granted Aug 30, 1988·11 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →