Inventor · disambiguated record
Ferdinand List
Also filed as: ALFS HELMUT · LIST FERDINAND
10 granted patents·68 citations·filing 1973–1978
88Inventor score
Files withHUELS CHEMISCHE WERKE AG10
Top patents by PatentIndex Score
10 records- 0174US4067779AProcess for the purification of 1,10-decanedicarboxylic acidHUELS CHEMISCHE WERKE AG·Filed 1975·Granted Jan 10, 1978·14 cites·12 claims
- 0273US4340752AProcess for the purification of terephthalic acidHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Jul 20, 1982·11 cites·13 claims
- 0371US3940431ADimethyl terephthalate prepared by the esterification of terephthalic acidHUELS CHEMISCHE WERKE AG·Filed 1973·Granted Feb 24, 1976·9 cites·9 claims
- 0458US4162365ALiquid phase air oxidation process for making phthalic acidsHUELS CHEMISCHE WERKE AG·Filed 1976·Granted Jul 24, 1979·5 cites·18 claims
- 0556US4211506AMethod and apparatus for the metered conveying of pulverulent solidsHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Jul 8, 1980·14 cites·1 claims
- 0640US4005124AProcess for recovering the mother liquor produced by the esterification of terephthalic acid with methanolHUELS CHEMISCHE WERKE AG·Filed 1974·Granted Jan 25, 1977·2 cites·23 claims
- 0734US4009199AMethod for preparation of dimethyl terephthalateHUELS CHEMISCHE WERKE AG·Filed 1975·Granted Feb 22, 1977·4 cites·12 claims
- 0831US3980441AApparatus for the production of dimethyl terephthalate by the esterification of terephthalic acidHUELS CHEMISCHE WERKE AG·Filed 1975·Granted Sep 14, 1976·3 cites·2 claims
- 0931US3972912AProcess for the esterification of terephthalic acid in the gas phaseHUELS CHEMISCHE WERKE AG·Filed 1973·Granted Aug 3, 1976·4 cites·9 claims
- 1027US4015943AApparatus for the esterification of terephthalic acid in the gas phaseHUELS CHEMISCHE WERKE AG·Filed 1976·Granted Apr 5, 1977·2 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →