Inventor · disambiguated record
Norvald Gjelsvik
Also filed as: GJELSVIK NORVALD
6 granted patents·101 citations·filing 1977–1980
84Inventor score
Files withELKEM SPIGERVERKET AS2ATOMENERGI INST FOR1DUGAN MARTIN1ELKEM AS1SJELDNE JORDARTER FORSKNING1
Top patents by PatentIndex Score
6 records- 0185US4110399AProcess for the extraction of alumina from aluminum-containing silicatesATOMENERGI INST FOR·Filed 1977·Granted Aug 29, 1978·44 cites·12 claims
- 0271US4297326AMethod of producing a pure aluminiumoxide from solutions containing dissolved ions of aluminium and ironELKEM SPIGERVERKET AS·Filed 1980·Granted Oct 27, 1981·21 cites·1 claims
- 0366US4238467AMethod of producing yttrium oxide with particularly big particlesDUGAN MARTIN·Filed 1979·Granted Dec 9, 1980·11 cites·3 claims
- 0450US4367215AMethod of acid leaching of silicatesELKEM AS·Filed 1980·Granted Jan 4, 1983·12 cites·8 claims
- 0548US4297327AMethod of precipitation of pure aluminiumchloride from solutions which contain ions of aluminium and magnesiumELKEM SPIGERVERKET AS·Filed 1980·Granted Oct 27, 1981·8 cites·4 claims
- 0634US4352574AMixer-settler apparatusSJELDNE JORDARTER FORSKNING·Filed 1979·Granted Oct 5, 1982·5 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →