F16L 55/44
Expandable
Official title: expandable
F16L55/44 (Expandable) appears on 100 US grants and 110 published applications in this corpus.
Search patents in F16L- Granted patents
- 100
- Published applications
- 110
- Assignees
- 66
- Inventors
- 283
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 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 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 3 | 2 |
| 2010 | 1 | 2 |
| 2011 | 2 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 3 |
| 2015 | 1 | 2 |
| 2016 | 3 | 6 |
| 2017 | 5 | 3 |
| 2018 | 2 | 3 |
| 2019 | 2 | 8 |
| 2020 | 10 | 11 |
| 2021 | 6 | 19 |
| 2022 | 11 | 15 |
| 2023 | 19 | 9 |
| 2024 | 11 | 10 |
| 2025 | 11 | 3 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pipe inspection apparatus2 Jun 2026US 12,644,555 B2Korea Gas Corporation
- Pipe navigation apparatus with bypass fluid channel12 May 2026US 12,624,788 B2GE Infrastructure Technology LLC
- Power apparatus for pipeline endoscope device, pipeline endoscope device, and pipeline inspection system3 Feb 2026US 12,540,702 B1Shenzhen Andelian Technology Co., Ltd.
- Spray coating system and method6 Jan 2026US 12,515,233 B2Hartman-Walsh Corporation
- Device for centring and/or pulling a tool in a pipeline30 Dec 2025US 12,509,949 B2Petroleo Brasileiro S.A. - Petrobras
- Robot for trenchless pipeline and manhole rehabilitation3 Sep 2026US 2026/0258897 A1
- Tool Module for Carrier Robot and Machining Method Implemented by the Tool Module16 Jul 2026US 2026/0202000 A1
- Apparatus for Applying a Flowable Material to an Inner Wall of a tube5 Mar 2026US 2026/0061453 A1
- Irradiation device5 Mar 2026US 2026/0063256 A1Shonan Gosei-Jushi-Seisakusho K. K.
- Robot crawling12 Feb 2026US 2026/0043512 A1ROLLS-ROYCE plc
Most cited
By later US patents
- Gas main robotic inspection system178US 6,917,176 B2Carnegie Mellon University · 2005
- Pneumatically operated pipe crawler105US 4,372,161 A1983
- Foam pipeline pig with seal cups34US 5,625,917 A1997
- Self-centering suspension for in-pipe use27US 5,971,404 ABG plc · 1999
- Pipe leak detection26US 6,348,869 B1Lattice Intellectual Property Limited · 2002