F16L 9/121
With three layers
Official title: {with three layers}
F16L9/121 (With three layers) appears on 163 US grants and 143 published applications in this corpus.
Search patents in F16L- Granted patents
- 163
- Published applications
- 143
- Assignees
- 128
- Inventors
- 359
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 2 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 16 | 4 |
| 2002 | 7 | 6 |
| 2003 | 5 | 6 |
| 2004 | 4 | 14 |
| 2005 | 5 | 7 |
| 2006 | 6 | 7 |
| 2007 | 3 | 3 |
| 2008 | 1 | 2 |
| 2009 | 2 | 3 |
| 2010 | 0 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 6 |
| 2014 | 2 | 6 |
| 2015 | 2 | 4 |
| 2016 | 2 | 6 |
| 2017 | 5 | 5 |
| 2018 | 5 | 7 |
| 2019 | 6 | 6 |
| 2020 | 9 | 6 |
| 2021 | 3 | 6 |
| 2022 | 4 | 9 |
| 2023 | 6 | 9 |
| 2024 | 7 | 7 |
| 2025 | 4 | 3 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aircraft air duct pipe comprising at least one pipe coupling and method of manufacturing said pipe30 Jun 2026US 12,669,196 B2Airbus Operations GmbH
- Resin rich polyurea-based integrated external layer for reinforced thermosetting resin piping protection5 Aug 2025US 12,379,050 B2Saudi Arabian Oil Company
- Multilayer composite pipe and pipe assemblies including reflective insulation20 May 2025US 12,305,792 B2Titeflex Corporation
- Multilayer tube for automotive applications25 Mar 2025US 12,259,083 B2Cooper-Standard Automotive Inc.
- Composites having a thermoplastic matrix18 Mar 2025US 12,252,606 B2Evonik Operations GmbH
- Thermally stable multilayer pipe17 Sep 2026US 2026/0276111 A1Engineered Profiles LLC
- Improved tubes and hoses displaying information23 Jul 2026US 2026/0210458 A1
- Flexible pipe and a method of manufacturing a flexible pipe30 Apr 2026US 2026/0117896 A1Polyflow LLC
- Multi-layer pipe and method of manufacturing a multi-layer pipe12 Feb 2026US 2026/0043497 A1Polyflow LLC
- Multi-layered pipe5 Feb 2026US 2026/0036227 A1Wavin B. V.
Most cited
By later US patents
- Spoolable composite tubular member with energy conductors188US 5,913,337 AFiber Spar and Ture Corporation · 1999
- Spoolable composite tubular member with energy conductors152US 5,908,049 AFiber Spar and Tube Corporation · 1999
- Spoolable composite tubular member with integrated conductors147US 5,285,008 AConoco Inc. · 1994
- Corrugated multi-layer tubing having at least one fluoroplastic layer145US 5,284,184 AITT Corporation · 1994
- Composite tubular member with multiple cells90US 5,097,870 AConoco Inc. · 1992