F24F 13/0281
Multilayer duct
Official title: {Multilayer duct}
F24F13/0281 (Multilayer duct) appears on 108 US grants and 108 published applications in this corpus.
Search patents in F24F- Granted patents
- 108
- Published applications
- 108
- Assignees
- 67
- Inventors
- 211
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 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 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 9 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 4 |
| 2002 | 3 | 5 |
| 2003 | 3 | 3 |
| 2004 | 4 | 10 |
| 2005 | 1 | 3 |
| 2006 | 3 | 4 |
| 2007 | 4 | 5 |
| 2008 | 0 | 0 |
| 2009 | 2 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 6 |
| 2014 | 1 | 0 |
| 2015 | 2 | 5 |
| 2016 | 1 | 7 |
| 2017 | 5 | 4 |
| 2018 | 5 | 5 |
| 2019 | 6 | 12 |
| 2020 | 8 | 6 |
| 2021 | 6 | 3 |
| 2022 | 7 | 8 |
| 2023 | 6 | 5 |
| 2024 | 3 | 6 |
| 2025 | 5 | 5 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Self-muffling acoustic duct assembly for noise attenuation in a vehicle and method of using the same18 Aug 2026US 12,710,193 B2The Boeing Company
- Moisture and/or thermal resistance monitoring system for insulation-containing conduit and methods of use2 Jun 2026US 12,644,617 B2Royal Metal Products
- Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials16 Sep 2025US RE50,587 E1Vaughanair Canada Ulc
- Parallel-walled ventilation duct assembly with integrated low-profile subducts3 Jun 2025US 12,320,542 B2Subduct Riser Manufacturing, LLC
- Apparatus having a protective envelope, use thereof, and method for operating a room region3 Jun 2025US 12,320,546 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Layered structure of a flat, dimensionally stable building panel and a self-supporting air duct made of the layered structure12 Mar 2026US 2026/0070300 A1Saint-Gobain Isover
- Parallel-walled ventilation duct assembly with integrated low-profile subducts28 Aug 2025US 2025/0271170 A1Subduct Riser Manufacturing, LLC
- Self-muffling acoustic duct assembly for noise attenuation in a vehicle and method of using the same7 Aug 2025US 2025/0251167 A1The Boeing Company
- Fire-rated ventilation duct and a method of manufacturing and/or installing such ventilation duct in a fire-rated ventilation duct structure penetration arrangement12 Jun 2025US 2025/0189164 A1Rockwool A/S
- Air-ducting component with spread tow fabric, method for producing a component and method of using a spread tow fabric in a component and/or a method12 Jun 2025US 2025/0189165 A1Diehl Aviation Laupheim GmbH
Most cited
By later US patents
- Sheet-metal insulated register box with adjustable elbow fitting87US 5,957,506 AM & M Manufacturing, Inc. · 1999
- Air duct and method of making same83US 5,918,644 A1999
- Apparatus for on-site installation of air duct system78US 6,231,704 B12001
- Glass fiber airduct with coated interior surface containing a biocide41US 5,487,412 ASchuller International, Inc. · 1996
- Flexible insulated duct and the method of making the duct41US 5,947,158 AJohns Manville International, Inc. · 1999