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USPTO Patent Rankings Data through Dec 31, 2025
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Kurt Stift — 6 Patents

VOVoest-Alpine: 4 patents #35 of 348Top 15%
KGKorf Engineering Gmbh: 1 patents #11 of 19Top 60%
KAKorf-Stahl Ag: 1 patents #9 of 17Top 55%
Leoben, AT: #21 of 190 inventorsTop 15%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Kurt Stift has been granted 6 US patents while listed as an inventor at Voest-Alpine. The first was granted in 1981 and the most recent in August 1989. Kurt Stift ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Kurt Stift in Leoben, AT.

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
4861369 Process for gaining electric energy in addition to producing molten pig iron and an arrangement for carrying out the process Ludwig von Bogdandy, Werner Kepplinger, Gero Papst, Rolf Hauk 1989-08-29
4407864 Process for treating iron sponge Horst Sulzbacher, Gunther Saiger 1983-10-04
4396421 Method of, and arrangement for, producing molten pig iron or steel pre-material Walter Lugscheider 1983-08-02
4384886 Process for zinc removal from oxide-containing iron sources 1983-05-24
4376139 Process for treating metallic starting materials for smelting plants, particularly iron sponge particles Horst Sulzbacher, Gunther Saiger 1983-03-08
4254167 Process of treating sponge iron for protection against reoxidation and apparatus for carrying out the process Horst Sulzbacher, Gunther Saiger 1981-03-03