F16L 9/08
Rigid pipes: of concrete, cement, or asbestos cement, with or without reinforcement
Official title: of concrete, cement, or asbestos cement, with or without reinforcement (F16L9/16 - F16L9/22 take precedence)
F16L9/08 (Rigid pipes: of concrete, cement, or asbestos cement, with or without reinforcement) appears on 84 US grants and 67 published applications in this corpus.
Search patents in F16L- Granted patents
- 84
- Published applications
- 67
- Assignees
- 63
- Inventors
- 137
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 3 |
| 2005 | 0 | 3 |
| 2006 | 1 | 0 |
| 2007 | 0 | 3 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 3 | 2 |
| 2015 | 0 | 4 |
| 2016 | 1 | 5 |
| 2017 | 2 | 3 |
| 2018 | 4 | 4 |
| 2019 | 1 | 4 |
| 2020 | 5 | 7 |
| 2021 | 2 | 3 |
| 2022 | 3 | 5 |
| 2023 | 6 | 2 |
| 2024 | 4 | 5 |
| 2025 | 2 | 3 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Support structure and method of forming a support structure19 May 2026US 12,631,013 B2HC Properties Inc.
- Vault for encapsulating debris from asbestos concrete pipe repair17 Mar 2026US 12,578,036 B1
- Method for refurbishing pre-stressed concrete cylinder pipe and refurbished pre-stressed concrete cylinder pipe6 May 2025US 12,292,157 B1Technical Construction Infrastructure Inc.
- Pipe with an outer wrap25 Mar 2025US 12,259,084 B2Advanced Drainage Systems, Inc.
- Pipe joint, pipe and method of joining pipe sections26 Mar 2024US 11,940,068 B2Construction Research & Technology GmbH
- Multi-layered cementitious composition prefabricated prismatic member27 Aug 2026US 2026/0249589 A1
- Pipe handling system27 Aug 2026US 2026/0250105 A1
- Core wall-thinning design method for prestressed high-performance concrete cylinder pipe22 Jan 2026US 2026/0022072 A1Zhengzhou University
- Novel pre-stressed concrete cylinder pipe with pre-embedded acoustic emission sensor and distributed optical fiber, and manufacturing and monitoring methods thereof15 Jan 2026US 2026/0016448 A1Beijing Hanjianheshan Pipeline Co., Ltd
- Method for Refurbishing Pre-Stressed Concrete Cylinder Pipe and Refurbished Pre-Stressed Concrete Cylinder Pipe1 Jan 2026US 2026/0002612 A1
Most cited
By later US patents
- Precast concrete slab system and method therefor32US 7,134,805 B2Kwik Slab, LLC · 2006
- Reinforcing material for hydraulic substances and method for the production thereof31US 4,379,870 AMitsui Petrochemical Industries, Ltd. · 1983
- Reinforcing material for hydraulic substances and method for the production thereof27US 4,297,414 AMitsui Petrochemical Industries, Ltd. · 1981
- Acid resistant concrete articles, especially sulfur concrete pipes, and a method of manufacturing said articles18US 4,981,740 AKkkk A/S · 1991
- Stackable stirrup mat17US 4,466,467 A1984