F16L 9/133
The walls consisting of two layers
Official title: the walls consisting of two layers
F16L9/133 (The walls consisting of two layers) appears on 110 US grants and 152 published applications in this corpus.
Search patents in F16L- Granted patents
- 110
- Published applications
- 152
- Assignees
- 136
- Inventors
- 362
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 0 | 2 |
| 2003 | 1 | 4 |
| 2004 | 1 | 10 |
| 2005 | 3 | 6 |
| 2006 | 0 | 3 |
| 2007 | 4 | 4 |
| 2008 | 0 | 3 |
| 2009 | 2 | 3 |
| 2010 | 2 | 6 |
| 2011 | 0 | 3 |
| 2012 | 3 | 8 |
| 2013 | 1 | 15 |
| 2014 | 3 | 14 |
| 2015 | 6 | 5 |
| 2016 | 7 | 8 |
| 2017 | 3 | 5 |
| 2018 | 8 | 4 |
| 2019 | 3 | 4 |
| 2020 | 4 | 10 |
| 2021 | 3 | 6 |
| 2022 | 4 | 3 |
| 2023 | 6 | 10 |
| 2024 | 3 | 6 |
| 2025 | 6 | 7 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Flexible tubular structure23 Dec 2025US 12,502,862 B2Long PipesUSA, Inc.
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- Multilayer fuel line19 Aug 2025US 12,392,426 B2Ems-Chemie AG
- Thermally stable multilayer pipe17 Sep 2026US 2026/0276111 A1Engineered Profiles LLC
- Improved tubes and hoses displaying information23 Jul 2026US 2026/0210458 A1
- Pipeline member for ultrapure water and polyethylene-based resin composition for pipeline member for ultrapure water27 Nov 2025US 2025/0361407 A1Japan Polyethylene Corporation
- Coextruded Polyethylene Pipe and Methods of Making and Using Same28 Aug 2025US 2025/0271083 A1
- Multilayer Tube14 Aug 2025US 2025/0257821 A1Celanese International Corporation
Most cited
By later US patents
- Composite waste and water transport elements and methods of manufacture for use on aircraft123US 9,458,955 B2MAG Aerospace Industries, LLC · 2016
- Pressurized and/or cryogenic gas containers and conduits made with a gas impermeable polymer70US 5,150,812 AHoechst Celanese Corporation · 1992
- Synthetic resinous tube67US 4,101,699 ASamuel Moore and Company · 1978
- Composite tube and method of manufacture51US 4,968,545 AThe Dexter Corporation · 1990
- Multi-layered tubes having impact resistance-modified polyamide layers49US 5,219,003 AEMS-Inventa AG · 1993