C21D 2221/01
End parts
Official title: End parts (e.g. leading, trailing end)
C21D2221/01 (End parts) appears on 58 US grants and 60 published applications in this corpus.
Search patents in C21D- Granted patents
- 58
- Published applications
- 60
- Assignees
- 47
- Inventors
- 167
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 1 |
| 2004 | 2 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 4 |
| 2015 | 0 | 3 |
| 2016 | 1 | 1 |
| 2017 | 1 | 7 |
| 2018 | 2 | 8 |
| 2019 | 4 | 0 |
| 2020 | 5 | 2 |
| 2021 | 6 | 5 |
| 2022 | 1 | 8 |
| 2023 | 2 | 4 |
| 2024 | 6 | 2 |
| 2025 | 4 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for production of a steel tubular product, in particular an airbag tubular product, and a steel tubular product produced using this method, in particular an airbag tubular product11 Aug 2026US 12,703,021 B2Benteler Steel/Tube GmbH
- Method of preparing a pipe-section16 Dec 2025US 12,498,057 B2Technip France
- High strength member, method for manufacturing high strength member, and method for manufacturing steel sheet for high strength member28 Oct 2025US 12,454,733 B2Jfe Steel Corporation
- Thick composite-phase steel having excellent durability and manufacturing method therefor7 Oct 2025US 12,435,400 B2Posco
- Method and system for heating using an energy beam25 Mar 2025US 12,258,641 B2Etxe-Tar, S.A.
- Thick composite-phase steel having excellent durability and manufacturing method therefor29 Jan 2026US 2026/0028706 A1Posco
- High strength member, method for manufacturing high strength member, and method for manufacturing steel sheet for high strength member22 Jan 2026US 2026/0022438 A1Jfe Steel Corporation
- Hardening of a zinc coated screw body26 Sep 2024US 2024/0318291 A1Hilti Aktiengesellschaft
- Hot-Formed Previously Welded Steel Part with very High Mechanical Resistance and Production Method11 Apr 2024US 2024/0116141 A1ArcelorMittal
- Cylinder head, cylinder block, internal combustion engine, and method for manufacturing cylinder head9 Nov 2023US 2023/0358189 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
Most cited
By later US patents
- Self-drilling/self-tapping fastener66US 5,755,542 AElco Textron Inc. · 1998
- Screws having selected heat treatment and hardening35US 6,109,851 AIllinois Tool Works Inc. · 2000
- Method of repairing an article24US 8,539,659 B2United Technologies Corporation · 2013
- Nails having selected heat treatment and hardening18US 6,086,305 AIllinois Tool Works Inc. · 2000
- Self-tapping, corrosion-resistant screw with hardened tip17US 6,338,600 B22002