F41A 21/44
Insulation jackets
Official title: Insulation jackets; Protective jackets
F41A21/44 (Insulation jackets) appears on 97 US grants and 82 published applications in this corpus.
Search patents in F41A- Granted patents
- 97
- Published applications
- 82
- Assignees
- 49
- Inventors
- 120
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 3 |
| 2011 | 4 | 4 |
| 2012 | 1 | 1 |
| 2013 | 4 | 3 |
| 2014 | 3 | 7 |
| 2015 | 4 | 5 |
| 2016 | 4 | 6 |
| 2017 | 6 | 7 |
| 2018 | 8 | 5 |
| 2019 | 11 | 8 |
| 2020 | 8 | 3 |
| 2021 | 6 | 7 |
| 2022 | 3 | 2 |
| 2023 | 4 | 7 |
| 2024 | 5 | 2 |
| 2025 | 9 | 5 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Suppressor cover for rifle6 Oct 2026US 12,753,985 B2
- Heat shield for firearm suppressors and method11 Aug 2026US 12,704,336 B1
- Heat protective sleeve21 Jul 2026US 12,687,365 B2Battle Born Supply Co.
- Apparatus, methods, and system for retarding heat dissipating from the barrel of a firearm28 Apr 2026US 12,613,073 B2
- Firearm suppressor cover24 Mar 2026US 12,584,707 B2Polar Apex Oy
- Firearm Barrel for Lever Action Firearm11 Jun 2026US 2026/0160514 A1Blackstone Firearms, LLC
- Suppressor heat shield30 Apr 2026US 2026/0118085 A1Sig Sauer, Inc.
- Suppressor cover for rifle30 Apr 2026US 2026/0118086 A1
- Firearm Barrel with Non-Metal Outer Sleeve23 Apr 2026US 2026/0110511 A1Blackstone Firearms, LLC
- Device to improve firearm precision26 Mar 2026US 2026/0085905 A1Apertura Ballistics, LLC
Most cited
By later US patents
- Heat shielding and thermal venting system40US 9,658,010 B12017
- Thermal shroud for a gun tube35US 4,841,836 A1989
- Thermal jacket for elongated structures32US 4,346,643 AHughes Aircraft Company · 1982
- Apparatus for uniforming heat of gun barrel30US 4,762,048 AFuji Electric Co., Ltd. · 1988
- Sound suppressor for a firearm29US 9,175,920 B2FN America, LLC · 2015