Ronald Kefferstein — 19 Patents at Arcelormittal

Ronald Kefferstein has been granted 19 US patents while listed as an inventor at Arcelormittal. The first was granted in 2000 and the most recent in October 2025. Ronald Kefferstein ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list Ronald Kefferstein in Marignane, FR.

Patents per Year

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Showing 1–19 of 19 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12454737	Method of forming a hot stamped coated steel product	Pascal Drillet, Dominique Spehner	2025-10-28
12012640	Method of forming a hot stamped coated steel product	Pascal Drillet, Dominique Spehner	2024-06-18	$39,032,000
11939643	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2024-03-26	$64,000,000
11326227	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2022-05-10	$238,712,000
11041226	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2021-06-22	$302,728,000
10961602	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2021-03-30	$352,622,000
10597747	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2020-03-24	$44,463,000
10590507	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2020-03-17	$35,460,000
10577674	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2020-03-03	$127,086,000
10550447	Coated steel strips, coated stamped products and methods	Pascal Drillet, Dominique Spehner	2020-02-04	$84,153,000
9708683	Coated steel strips, methods of making the same, methods of using the same, stamping blanks prepared from the same, stamped products prepared from the same, and articles of manufacture which contain such a stamped product	Pascal Drillet, Dominique Spehner	2017-07-18
8733142	Process for manufacturing stamped products, and stamped products prepared from the same	Dominique Spehner, Pascal Drillet	2014-05-27
8440323	Coated steel stamped product	Dominique Spehner, Pascal Drillet	2013-05-14
8307680	Coated steel strips, methods of making the same, methods of using the same, stamping blanks prepared from the same, stamped products prepared from the same, and articles of manufacture which contain such a stamped product	Pascal Drillet, Dominique Spehner	2012-11-13
8066829	Process for manufacturing stamped products, and stamped products prepared from the same	Dominique Spehner, Pascal Drillet	2011-11-29
6564604	Process for the manufacture of a part with very high mechanical properties, formed by stamping of a strip of rolled steel sheet and more particularly hot rolled and coated	Xavier Jartoux	2003-05-20
6447590	Treatment composition based on pregelatinized starch and process for applying it to a metal, especially steel, surface	Lothaire Scherer	2002-09-10
6309697	Composition for temporarily protecting metal components from corrosion, its processes of preparation and of application, and metal components obtained from this composition	Lothaire Scherer, Philippe Antoine	2001-10-30
6063447	Process for treating the surface of metal parts	Claude Morand	2000-05-16

Ronald Kefferstein — 19 Patents

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