C22B 34/32
Obtaining chromium
C22B34/32 (Obtaining chromium) appears on 166 US grants and 104 published applications in this corpus.
Search patents in C22B- Granted patents
- 166
- Published applications
- 104
- Assignees
- 134
- Inventors
- 440
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 8 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 3 |
| 2004 | 2 | 5 |
| 2005 | 0 | 2 |
| 2006 | 1 | 5 |
| 2007 | 2 | 4 |
| 2008 | 2 | 5 |
| 2009 | 1 | 2 |
| 2010 | 4 | 7 |
| 2011 | 2 | 2 |
| 2012 | 6 | 4 |
| 2013 | 3 | 3 |
| 2014 | 1 | 4 |
| 2015 | 3 | 4 |
| 2016 | 0 | 6 |
| 2017 | 4 | 4 |
| 2018 | 3 | 2 |
| 2019 | 3 | 6 |
| 2020 | 7 | 2 |
| 2021 | 5 | 1 |
| 2022 | 2 | 6 |
| 2023 | 0 | 6 |
| 2024 | 6 | 7 |
| 2025 | 4 | 7 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- Carbonation and selective leaching for the recovery of metals11 Aug 2026US 12,703,894 B2Phoenix Tailings, Inc.
- Method for recovering chromium contained in a bath for pickling metallic materials and facility for implementing same17 Feb 2026US 12,553,109 B2Aperam
- Systems and methods for generating hydrogen and magnetite from rock10 Feb 2026US 12,545,576 B2Ohio State Innovation Foundation
- Treatment system for removing iron-aluminum-chromium reaction products in leaching solution of laterite nickel ore13 Jan 2026US 12,522,890 B2Pt Esg New Energy Material
- A process for transition metal oxide reduction30 Jul 2026US 2026/0218323 A1Helios Project Ltd.
- Complex Multi-Component Alloy of Iron, Silicon and Chromium18 Jun 2026US 2026/0167504 A1Re Alloys sp. z.o.o
- Method of Obtaining a Nickel Ore Concentrate, Method of Processing a Nickel Ore Concentrate, and Method of Recovering Materials Derived from Nickel Ore21 May 2026US 2026/0139342 A1New Wave Royalties Sociedad Anonima
- Pyrometallurgical process and plant for selective recycling of molybdenum in the reprocessing of spent petrochemical catalysts29 Jan 2026US 2026/0028697 A1Eco'ring
- System for processing red mud and method of processing red mud1 Jan 2026US 2026/0002225 A1Red Mud Enterprises LLC
Most cited
By later US patents
- Vertical shaft melting furnace and method of melting65US 4,877,449 AInstitute of Gas Technology · 1989
- Method for induction melting reactive metals and alloys54US 4,738,713 AThe Duriron Company, Inc. · 1988
- Process for producing electrolyte for redox cell35US 4,732,827 AAgency of Industrial Science and Technology · 1988
- Process to recover metals from spent catalyst31US 6,180,072 B2Shell Oil Company · 2001
- Process for separating and recovering base metals from used hydroprocessing catalyst26US 7,837,960 B2Chevron U.S.A.Inc. · 2010