F16L 9/123
With four layers
Official title: {with four layers}
F16L9/123 (With four layers) appears on 67 US grants and 76 published applications in this corpus.
Search patents in F16L- Granted patents
- 67
- Published applications
- 76
- Assignees
- 69
- Inventors
- 176
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 2 |
| 2002 | 1 | 4 |
| 2003 | 3 | 3 |
| 2004 | 2 | 5 |
| 2005 | 3 | 7 |
| 2006 | 1 | 3 |
| 2007 | 1 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 2 | 5 |
| 2015 | 1 | 3 |
| 2016 | 1 | 4 |
| 2017 | 2 | 3 |
| 2018 | 2 | 2 |
| 2019 | 2 | 1 |
| 2020 | 2 | 3 |
| 2021 | 4 | 2 |
| 2022 | 3 | 6 |
| 2023 | 1 | 3 |
| 2024 | 1 | 2 |
| 2025 | 5 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- HVACR pipe27 Jan 2026US 12,535,156 B2Ptubes, Inc.
- Tube body intermediate23 Dec 2025US 12,504,101 B2Hitachi Astemo, Ltd.
- Tube body intermediate30 Sep 2025US 12,429,150 B2Hitachi Astemo, Ltd.
- 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.
- Tube with flame retardant layer3 Sep 2026US 2026/0258899 A1Ti Automotive (Fuldabrueck) GmbH
- Hvacr pipe11 Jun 2026US 2026/0160361 A1Ptubes, Inc.
- Multi-layered pipe5 Feb 2026US 2026/0036227 A1Wavin B. V.
- Method of producing tube body25 Sep 2025US 2025/0297696 A1Hitachi Astemo, Ltd.
- Method for producing tube body11 Sep 2025US 2025/0283557 A1Hitachi Astemo, Ltd.
Most cited
By later US patents
- Corrugated multi-layer tubing having at least one fluoroplastic layer145US 5,284,184 AITT Corporation · 1994
- Multi-layer fuel and vapor tube77US 5,383,087 AITT Corporation · 1995
- Carbon fiber reinforced composite drive shaft73US 4,171,626 ACelanese Corporation · 1979
- Corrugated polymeric tubing having at least three layers with at least two respective layers composed of polymeric materials dissimilar to one another73US 5,469,892 AITT Automotive, Inc. · 1995
- Multi-layer tubing having electrostatic dissipation for handling hydrocarbon fluids50US 5,524,673 AITT Corporation · 1996