C22B
Production and refining of metals
Official title: Production and refining of metals (electrolytic c25); pretreatment of raw materials
C22B (Production and refining of metals) appears on 12,689 US grants and 9,022 published applications in this corpus.
Search patents in C22B- Granted patents
- 12,689
- Published applications
- 9,022
- Assignees
- 5,262
- Inventors
- 24,975
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 369 | 0 |
| 1977 | 353 | 0 |
| 1978 | 331 | 0 |
| 1979 | 244 | 0 |
| 1980 | 294 | 0 |
| 1981 | 346 | 0 |
| 1982 | 298 | 0 |
| 1983 | 321 | 0 |
| 1984 | 310 | 0 |
| 1985 | 271 | 0 |
| 1986 | 261 | 0 |
| 1987 | 240 | 0 |
| 1988 | 268 | 0 |
| 1989 | 229 | 0 |
| 1990 | 226 | 0 |
| 1991 | 204 | 0 |
| 1992 | 239 | 0 |
| 1993 | 236 | 0 |
| 1994 | 233 | 0 |
| 1995 | 216 | 0 |
| 1996 | 170 | 0 |
| 1997 | 178 | 0 |
| 1998 | 222 | 0 |
| 1999 | 221 | 0 |
| 2000 | 226 | 0 |
| 2001 | 242 | 66 |
| 2002 | 260 | 197 |
| 2003 | 194 | 230 |
| 2004 | 174 | 279 |
| 2005 | 148 | 250 |
| 2006 | 108 | 255 |
| 2007 | 108 | 232 |
| 2008 | 111 | 286 |
| 2009 | 194 | 295 |
| 2010 | 248 | 358 |
| 2011 | 216 | 318 |
| 2012 | 247 | 328 |
| 2013 | 240 | 339 |
| 2014 | 274 | 364 |
| 2015 | 284 | 428 |
| 2016 | 281 | 361 |
| 2017 | 308 | 298 |
| 2018 | 275 | 334 |
| 2019 | 309 | 306 |
| 2020 | 274 | 330 |
| 2021 | 225 | 347 |
| 2022 | 232 | 392 |
| 2023 | 235 | 539 |
| 2024 | 312 | 661 |
| 2025 | 389 | 645 |
| 2026 | 295 | 584 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- C22B 3/00Extraction of metal compounds from ores or concentrates by wet processes4,281
- C22B 7/00Working up raw materials other than ores2,624
- C22B 1/00Preliminary treatment of ores or scrap2,057
- C22B 9/00General processes of refining or remelting of metals1,754
- C22B 34/00Obtaining refractory metals1,500
- C22B 11/00Obtaining noble metals1,482
- C22B 15/00Obtaining copper1,362
- C22B 21/00Obtaining aluminium1,178
All 25 main groupsShow fewer
- C22B 5/00General methods of reducing to metals1,114
- C22B 23/00Obtaining nickel or cobalt1,069
- C22B 26/00Obtaining alkali, alkaline earth metals or magnesium938
- C22B 60/00Obtaining metals of atomic number 87 or higher, i.e. radioactive metals707
- C22B 19/00Obtaining zinc or zinc oxide610
- C22B 59/00Obtaining rare earth metals567
- C22B 13/00Obtaining lead449
- C22B 4/00Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys403
- C22B 47/00Obtaining manganese265
- C22B 43/00Obtaining mercury206
- C22B 30/00Obtaining antimony, arsenic or bismuth138
- C22B 61/00Obtaining metals not elsewhere provided for in this subclass137
- C22B 25/00Obtaining tin130
- C22B 58/00Obtaining gallium or indium116
- C22B 17/00Obtaining cadmium96
- C22B 41/00Obtaining germanium33
- C22B 35/00Obtaining beryllium12
Recent patents
- Tetraazadodecane based chelating agents for separation of rare earth elements and method therefor6 Oct 2026US 12,752,219 B2Ustav Organicke Chemie A Biochemie Av Cr, V. V. I.
- Liquefaction process6 Oct 2026US 12,753,353 B1
- Gas-Assisted Microflow Extraction (GAME) system patent6 Oct 2026US 12,753,463 B2Phinix, LLC
- Method of carbothermic process of magnesium production and co-production of calcium carbide6 Oct 2026US 12,753,464 B2Zhengzhou University
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- Oxime-based adsorbents and methods of use for selective separation of rare earth elements8 Oct 2026US 2026/0307049 A1The Board of Regents of the University of Oklahoma
- Synthesis of bio-based catecholic acid- and derivatives-functionalized adsorbents for recovery of metals and metalloids from acidic solutions8 Oct 2026US 2026/0307051 A1The Penn State Research Foundation
- Lime and hydraulic cement manufacture by electrolysis using hyaloclastite or lava, carbon mineralization by hyaloclastite or lava electrolysis and method of making and using same8 Oct 2026US 2026/0308006 A1Greencraft LLC
- Process for the extraction of a by-product metal from a mineral concentrate8 Oct 2026US 2026/0308710 A1
- Systems and methods for improved metal recovery by leaching8 Oct 2026US 2026/0308711 A1Freeport Minerals Corporation
Most cited
By later US patents
- Cryoplasty device and method384US 5,868,735 ASciMed Life Systems, Inc. · 1999
- Fast quench reactor method295US 5,935,293 ALockheed Martin Idaho Technologies Company · 1999
- Surface-functionalized mesoporous carbon materials255US 9,249,241 B2UT-Battelle, LLC · 2016
- Diamond and cubic boron nitride abrasive compacts using size selective abrasive particle layers250US 4,311,490 AGeneral Electric Company · 1982
- Fast quench reactor and method231US 5,749,937 ALockheed Idaho Technologies Company · 1998