F16L 57/04
Against fire or other external sources of extreme heat
Official title: against fire or other external sources of extreme heat
F16L57/04 (Against fire or other external sources of extreme heat) appears on 150 US grants and 189 published applications in this corpus.
Search patents in F16L- Granted patents
- 150
- Published applications
- 189
- Assignees
- 111
- Inventors
- 326
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 4 |
| 2005 | 1 | 2 |
| 2006 | 1 | 6 |
| 2007 | 1 | 6 |
| 2008 | 3 | 8 |
| 2009 | 2 | 8 |
| 2010 | 4 | 9 |
| 2011 | 1 | 3 |
| 2012 | 5 | 8 |
| 2013 | 1 | 13 |
| 2014 | 8 | 12 |
| 2015 | 8 | 11 |
| 2016 | 7 | 13 |
| 2017 | 9 | 5 |
| 2018 | 11 | 18 |
| 2019 | 9 | 6 |
| 2020 | 10 | 12 |
| 2021 | 8 | 8 |
| 2022 | 9 | 5 |
| 2023 | 5 | 10 |
| 2024 | 6 | 11 |
| 2025 | 6 | 7 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wire bonder and gas pipe connector therefor26 May 2026US 12,638,125 B2Diodes Incorporated
- Natural gas pipelines, methods for filling an explosion suppression component, and methods for an explosion suppression experiment14 Apr 2026US 12,601,443 B2Changzhou University
- High abrasion resistance hose cover27 Jan 2026US 12,534,608 B2ContiTech USA, Inc.
- Heat resistant joining line seal system27 Jan 2026US 12,535,175 B1Honeywell International Inc.
- Fluid coupling and sleeve therefor13 Jan 2026US 12,523,333 B2Eaton Intelligent Power Limited
- Class 1 flexible uninsulated duct with polymer core and integrated flame resistant barrier layer, method of use, and method of making1 Oct 2026US 2026/0298394 A1Flexible Technologies, Inc.
- Tube with flame retardant layer3 Sep 2026US 2026/0258899 A1Ti Automotive (Fuldabrueck) GmbH
- Coating material structure8 Jan 2026US 2026/0009488 A1Zhi Hui Co., Ltd.
- Ductile flame-retardant polyamide compositions and uses thereof, in particular for railways18 Sep 2025US 2025/0289955 A1Arkema France
- Circumferentially continuous, fire resistant, multilayer thermal sleeve11 Sep 2025US 2025/0283569 A1Federal-Mogul Powertrain LLC
Most cited
By later US patents
- Fire-resistant intumescent laminates251US 3,934,066 AW. R. Grace & Co. · 1976
- Fire protected foamed polymeric materials92US 4,871,477 AFirestop Chemical Corporation · 1989
- Fire-barriers60US 4,509,559 ADunlop Limited · 1985
- Fire and heat protection wrap for conduits, cable trays, other electrical transmission lines and gas and oil pipelines53US 5,985,385 ANo Fire Technologies, Inc. · 1999
- Method of making a fire retardant conduit50US 4,137,949 AGeneral Electric Company · 1979