F17D 5/04
By means of a signalling fluid enclosed in a double wall
Official title: by means of a signalling fluid enclosed in a double wall
F17D5/04 (By means of a signalling fluid enclosed in a double wall) appears on 58 US grants and 30 published applications in this corpus.
Search patents in F17D- Granted patents
- 58
- Published applications
- 30
- Assignees
- 40
- Inventors
- 87
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 3 | 3 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 4 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 2 | 2 |
| 2023 | 1 | 4 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Monitoring of lined pipeline31 Mar 2026US 12,590,665 B2Pioneer Lining Technology Limited
- Real time integrity monitoring of on-shore pipes5 Aug 2025US 12,379,075 B2FlexSteel USA, LLC
- System for circulating air through double pipes for supplying gas and air circulation method using same25 Jun 2024US 12,018,791 B2Hanwha Ocean Co., Ltd.
- Pipeline-leak-containment apparatus23 Jan 2024US 11,879,568 B2Canadian Pressure Control Inc.
- Real time integrity monitoring of on-shore pipes20 Jun 2023US 11,680,685 B2Trinity Bay Equipment Holdings, LLC
- A hazardous fluid isolation system8 Oct 2026US 2026/0309284 A1Fabrum IP Holdings Limited
- Monitoring of Lined Pipeline11 Apr 2024US 2024/0117916 A1Pioneer Lining Technology Limited
- Energy and hydrogen transport system21 Dec 2023US 2023/0408029 A1
- Method and apparatus for achieving zero emissions of gaseous substances in rtp pipelines and conduits14 Dec 2023US 2023/0400125 A1Smart Pipe Company, Inc.
- Real time integrity monitoring of on-shore pipes12 Oct 2023US 2023/0324010 A1Trinity Bay Equipment Holdings, LLC
Most cited
By later US patents
- Dual wall safety tube580US 4,653,541 AParker-Hannifin Corporation · 1987
- Double-containment thermoplastic pipe assembly82US 4,786,088 AAsahi/America, Inc. · 1988
- Secondary containment system68US 4,805,444 A1989
- Method of and device for remotely detecting leaks in a fluid-conveying pipe-line submerged within an ambient fluid and pipe-line provided with such a detection device55US 4,450,711 ATechnigaz · 1984
- Double-containment thermoplastic pipe assembly51US 4,930,544 AAsahi/America, Inc. · 1990