C22
Metallurgy
Official title: Metallurgy; ferrous or non-ferrous alloys; treatment of alloys or non-ferrous metals
C22 (Metallurgy) appears on 46,104 US grants and 45,904 published applications in this corpus.
Search patents in C22- Granted patents
- 46,104
- Published applications
- 45,904
- Assignees
- 12,454
- Inventors
- 82,977
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 741 | 0 |
| 1977 | 686 | 0 |
| 1978 | 665 | 0 |
| 1979 | 509 | 0 |
| 1980 | 561 | 0 |
| 1981 | 609 | 0 |
| 1982 | 512 | 0 |
| 1983 | 614 | 0 |
| 1984 | 594 | 0 |
| 1985 | 536 | 0 |
| 1986 | 610 | 0 |
| 1987 | 603 | 0 |
| 1988 | 662 | 0 |
| 1989 | 794 | 0 |
| 1990 | 689 | 0 |
| 1991 | 702 | 0 |
| 1992 | 727 | 0 |
| 1993 | 664 | 0 |
| 1994 | 723 | 0 |
| 1995 | 649 | 0 |
| 1996 | 657 | 0 |
| 1997 | 582 | 0 |
| 1998 | 706 | 0 |
| 1999 | 750 | 0 |
| 2000 | 718 | 0 |
| 2001 | 827 | 244 |
| 2002 | 846 | 858 |
| 2003 | 799 | 1005 |
| 2004 | 690 | 1127 |
| 2005 | 515 | 1028 |
| 2006 | 431 | 1067 |
| 2007 | 436 | 1078 |
| 2008 | 407 | 1226 |
| 2009 | 605 | 1441 |
| 2010 | 857 | 1672 |
| 2011 | 810 | 1587 |
| 2012 | 951 | 1689 |
| 2013 | 985 | 1865 |
| 2014 | 1144 | 1957 |
| 2015 | 1266 | 2418 |
| 2016 | 1400 | 2407 |
| 2017 | 1584 | 2324 |
| 2018 | 1658 | 2316 |
| 2019 | 1957 | 2401 |
| 2020 | 1829 | 2389 |
| 2021 | 1693 | 2262 |
| 2022 | 1712 | 2359 |
| 2023 | 1658 | 2497 |
| 2024 | 1762 | 2543 |
| 2025 | 1772 | 2233 |
| 2026 | 1247 | 1911 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subclasses
Granted patents
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.
- Forged steel roll for cold rolling6 Oct 2026US 12,752,325 B2Nippon Steel Corporation
- Thin-walled composite pipe with high thermal conductivity, and preparation method and application thereof6 Oct 2026US 12,752,327 B2Shaanxi Zinc Industry Co., Ltd.
- TIG welded joint6 Oct 2026US 12,752,379 B2Jfe Steel Corporation
- Liquefaction process6 Oct 2026US 12,753,353 B1
- Heater assembly for an aerosol-geenrating system8 Oct 2026US 2026/0305699 A1Philip Morris Products S. A.
- 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
- Durable metal-mxene composites and methods of making the same8 Oct 2026US 2026/0307145 A1The University of Chicago
- Powder metallurgy hot isostatic pressing cost-effective components using metal hydride feedstock8 Oct 2026US 2026/0307147 A1The Boeing Company
Most cited
By later US patents
- Multiple electrode ablation apparatus1,035US 5,536,267 AZoMed International · 1996
- Composite polycrystalline diamond compact502US 4,604,106 ASmith International, Inc. · 1986
- Method and a device for thermal analysis of cast iron475US 7,168,852 B2SinterCast AB · 2007
- Guidewire with superelastic distal portion468US 5,341,818 AAdvanced Cardiovascular Systems, Inc. · 1994
- Radially expandable non-axially contracting surgical stent438US 6,042,606 ACook Incorporated · 2000