F41A 21/22
Barrels which have undergone surface treatment
Official title: Barrels which have undergone surface treatment, e.g. phosphating {(F41A21/44 takes precedence)}
F41A21/22 (Barrels which have undergone surface treatment) appears on 42 US grants and 40 published applications in this corpus.
Search patents in F41A- Granted patents
- 42
- Published applications
- 40
- Assignees
- 22
- Inventors
- 66
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 2 |
| 2002 | 3 | 1 |
| 2003 | 4 | 1 |
| 2004 | 1 | 4 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 2 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 1 |
| 2011 | 2 | 1 |
| 2012 | 2 | 2 |
| 2013 | 0 | 2 |
| 2014 | 3 | 2 |
| 2015 | 2 | 0 |
| 2016 | 3 | 1 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 5 |
| 2020 | 4 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 2 |
| 2023 | 3 | 3 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Extended life composite matrix-wrapped lightweight firearm barrel1 Jul 2025US 12,345,490 B2Brown Dog Intellectual Properties
- Method of making a reliable gun1 Jul 2025US 12,345,495 B2
- Ammunition launching device8 Aug 2023US 11,719,500 B2Nexter Systems
- Structured firearm barrel25 Jul 2023US 11,709,030 B2
- Low temperature carbon/bn/aluminum oxide coating25 Apr 2023US 11,634,365 B2Richter Precision, Inc.
- Solving the Problems of the Prior Art Need to Oversize Weapon Bores and Loss of Accuracy Thereof21 May 2026US 2026/0139918 A1
- Weapons and weapon components including surface coatings7 May 2026US 2026/0126255 A1Maxterial, Inc.
- System and method for gun barrel cleaning and lubrication via treated ammunition15 Jan 2026US 2026/0016271 A1
- Extended life composite matrix-wrapped lightweight firearm barrel17 Jul 2025US 2025/0230998 A1Brown Dog Intellectual Properties
- Method of making a reliable gun25 May 2023US 2023/0160653 A1
Most cited
By later US patents
- Apparatus and method for applying coatings onto the interior surfaces of components and related structures produced therefrom19US 8,110,043 B2University of Virginia Patent Foundation · 2012
- Process for chemical vapor deposition of a homogeneous alloy of refractory metals16US 4,138,512 AThe United States of America as represented by the Secretary of the Army · 1979
- Method of internally coating a weapon barrel by means of a laser beam13US 6,548,125 B2Rheinmetall W & M GmbH · 2003
- Ballistics conditioning11US 6,576,598 B22003
- Dynamic process for enhancing the wear resistance of ferrous articles10US 7,191,558 B1The United States of America as represented by the Secretary of the Army · 2007