F41A 21/04
Barrel liners
F41A21/04 (Barrel liners) appears on 63 US grants and 61 published applications in this corpus.
Search patents in F41A- Granted patents
- 63
- Published applications
- 61
- Assignees
- 41
- Inventors
- 100
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 3 | 3 |
| 2003 | 4 | 3 |
| 2004 | 4 | 3 |
| 2005 | 0 | 3 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 1 | 3 |
| 2010 | 3 | 1 |
| 2011 | 3 | 3 |
| 2012 | 3 | 3 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 7 |
| 2017 | 1 | 2 |
| 2018 | 2 | 2 |
| 2019 | 3 | 5 |
| 2020 | 3 | 1 |
| 2021 | 1 | 2 |
| 2022 | 2 | 3 |
| 2023 | 1 | 3 |
| 2024 | 5 | 4 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Firearm barrel for lever action firearm11 Nov 2025US 12,467,707 B2Blackstone Firearms, LLC
- Enhanced metal-metal-matrix composite weapon barrels8 Apr 2025US 12,270,618 B2Consulting Group of Jocassee, Inc.
- Hybrid carbon-steel firearm barrel17 Dec 2024US 12,169,106 B2Blackpowder Products, Inc.
- Weapon barrel having integrated suppressor1 Oct 2024US 12,104,869 B2
- Hybrid composite projectile barrel3 Sep 2024US 12,078,436 B2
- Solving the Problems of the Prior Art Need to Oversize Weapon Bores and Loss of Accuracy Thereof21 May 2026US 2026/0139918 A1
- Firearm Barrel for Lever Action Firearm21 Aug 2025US 2025/0264288 A1Blackstone Firearms, LLC
- Enhanced metal-metal-matrix composite weapon barrels24 Oct 2024US 2024/0353194 A1Consulting Group of Jocassee, Inc.
- Carbon Firearm Barrel and Related Methods of Manufacturing10 Oct 2024US 2024/0337456 A1Grey Birch MFG
- Hybrid Carbon - Steel Firearm Barrel11 Jul 2024US 2024/0230264 A9Blackpowder Products, Inc.
Most cited
By later US patents
- Substrate coating techniques, including fabricating materials on a surface of a substrate81US 5,554,415 AQQC, Inc. · 1996
- Method of applying, sculpting, and texturing a coating on a substrate and for forming a heteroepitaxial coating on a surface of a substrate68US 5,648,127 AQQC, Inc. · 1997
- Method for depositing coatings on the interior surfaces of tubular structures62US 7,052,736 B2Southwest Research Institute · 2006
- Method of forming a diamond coating on a polymeric substrate54US 5,643,641 AQQC, Inc. · 1997
- Gun barrel for use at high temperature53US 4,669,212 AGeneral Electric Company · 1987