Assignee
ELKEM SPIGERVERKET AS
37 granted patents·434 citations·filing 1973–1980
Top patents by PatentIndex Score
37 records- 0192US4149394ALock arrangement employing mechanically acting code card and key cardELKEM SPIGERVERKET AS·Filed 1978·Granted Apr 17, 1979·75 cites·7 claims
- 0291US4238634AGas tight seal for electrodes in smelting furnacesELKEM SPIGERVERKET AS·Filed 1979·Granted Dec 9, 1980·23 cites·5 claims
- 0382US4384465ALock mechanismELKEM SPIGERVERKET AS·Filed 1980·Granted May 24, 1983·45 cites·4 claims
- 0478US4133657AApparatus for purification of gassesELKEM SPIGERVERKET AS·Filed 1977·Granted Jan 9, 1979·32 cites·11 claims
- 0571US4297326AMethod 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
- 0671US4065551AMethod of recovering fluorine from carbonaceous waste materialELKEM SPIGERVERKET AS·Filed 1976·Granted Dec 27, 1977·17 cites·7 claims
- 0765US4196602ALocking latch handle for windows, doors, and the likeELKEM SPIGERVERKET AS·Filed 1978·Granted Apr 8, 1980·26 cites·6 claims
- 0863US4147500ASystem for continuous analysis of gassesELKEM SPIGERVERKET AS·Filed 1977·Granted Apr 3, 1979·25 cites·21 claims
- 0963US3936588AControl system for electrical furnacesELKEM SPIGERVERKET AS·Filed 1974·Granted Feb 3, 1976·17 cites·16 claims
- 1062US4126424AMethod of compacting silica dustELKEM SPIGERVERKET AS·Filed 1977·Granted Nov 21, 1978·13 cites·3 claims
- 1160US4126423AMethod of increasing the bulk density of silica dustELKEM SPIGERVERKET AS·Filed 1977·Granted Nov 21, 1978·12 cites·7 claims
- 1259USD267306SSpadeELKEM SPIGERVERKET AS·Filed 1979·Granted Dec 21, 1982·7 cites·1 claims
- 1359US4005252AApparatus for gas collection in open electric smelting furnacesELKEM SPIGERVERKET AS·Filed 1975·Granted Jan 25, 1977·9 cites·4 claims
- 1459US4001488AApparatus for feeding charge to an electric smelting furnaceELKEM SPIGERVERKET AS·Filed 1975·Granted Jan 4, 1977·9 cites·6 claims
- 1551US4247306ADetection of flaws in metal membersELKEM SPIGERVERKET AS·Filed 1979·Granted Jan 27, 1981·15 cites·1 claims
- 1648US4297327AMethod 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
- 1738US4162284AMethod of producing mechanically strong pellets from non-oxidizable metal oxidesELKEM SPIGERVERKET AS·Filed 1977·Granted Jul 24, 1979·4 cites·5 claims
- 1838US4116830AMethod of treating wet-washed silica dustELKEM SPIGERVERKET AS·Filed 1977·Granted Sep 26, 1978·5 cites·5 claims
- 1937US4161501AMethod of producing mechanically strong metal oxide pelletsELKEM SPIGERVERKET AS·Filed 1976·Granted Jul 17, 1979·7 cites·6 claims
- 2037US3975575ARotatable furnace pot for smelting furnacesELKEM SPIGERVERKET AS·Filed 1975·Granted Aug 17, 1976·3 cites·12 claims
- 2136US4122880AAuxiliary gripping members for gripping shoes for vehicle wheelsELKEM SPIGERVERKET AS·Filed 1977·Granted Oct 31, 1978·6 cites·6 claims
- 2236US4072250AApparatus for plugging holes in an electric smelting furnace or the likeELKEM SPIGERVERKET AS·Filed 1976·Granted Feb 7, 1978·4 cites·2 claims
- 2335US3975576ARotatable furnace pot including stoking meansELKEM SPIGERVERKET AS·Filed 1975·Granted Aug 17, 1976·2 cites·18 claims
- 2431US4168093AVehicle trailer constructionELKEM SPIGERVERKET AS·Filed 1977·Granted Sep 18, 1979·6 cites·5 claims
- 2531US4122881AGripping shoes for vehicle wheelsELKEM SPIGERVERKET AS·Filed 1977·Granted Oct 31, 1978·4 cites·1 claims
- 2631US4115108AMatte smeltingELKEM SPIGERVERKET AS·Filed 1976·Granted Sep 19, 1978·3 cites·5 claims
- 2730US4141945AMethod of disposing of precipitated silicaELKEM SPIGERVERKET AS·Filed 1977·Granted Feb 27, 1979·4 cites·3 claims
- 2830US3976727AVenturi gas scrubbers for smelting furnacesELKEM SPIGERVERKET AS·Filed 1975·Granted Aug 24, 1976·2 cites·5 claims
- 2929US4245133ARoof for covered electric smelting furnacesELKEM SPIGERVERKET AS·Filed 1979·Granted Jan 13, 1981·0 cites·10 claims
- 3028US4059514AMethod for purification of industrial waste waterELKEM SPIGERVERKET AS·Filed 1976·Granted Nov 22, 1977·8 cites·1 claims
- 3126US4254298ADirect current smelting furnaceELKEM SPIGERVERKET AS·Filed 1978·Granted Mar 3, 1981·6 cites·1 claims
- 3226US3989918AApparatus for use in repair of ingot moldsELKEM SPIGERVERKET AS·Filed 1975·Granted Nov 2, 1976·4 cites·6 claims
- 3322US4166192AMatte smeltingELKEM SPIGERVERKET AS·Filed 1978·Granted Aug 28, 1979·2 cites·2 claims
- 3419US4081178AApparatus for collection of tapping gases from electric smelting furnacesELKEM SPIGERVERKET AS·Filed 1977·Granted Mar 28, 1978·3 cites·5 claims
- 3518US3970814AMethod for repairing ingot molds and apparatus thereforELKEM SPIGERVERKET AS·Filed 1974·Granted Jul 20, 1976·3 cites·8 claims
- 3617US3996340AMethod of producing aluminum fluorideELKEM SPIGERVERKET AS·Filed 1975·Granted Dec 7, 1976·3 cites·7 claims
- 3714US3950250AApparatus for purification of industrial waste waterELKEM SPIGERVERKET AS·Filed 1973·Granted Apr 13, 1976·1 cites·3 claims
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