E01F 5/005
Culverts
Official title: {Culverts (underground siphons E02D29/08; tunnels or galleries E21D; pipes in general F16L); Head-structures for culverts, or for drainage-conduit outlets in slopes}
E01F5/005 (Culverts) appears on 128 US grants and 96 published applications in this corpus.
Search patents in E01F- Granted patents
- 128
- Published applications
- 96
- Assignees
- 74
- Inventors
- 182
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 7 | 7 |
| 2003 | 5 | 5 |
| 2004 | 3 | 3 |
| 2005 | 4 | 4 |
| 2006 | 4 | 1 |
| 2007 | 0 | 4 |
| 2008 | 0 | 0 |
| 2009 | 3 | 3 |
| 2010 | 3 | 2 |
| 2011 | 0 | 3 |
| 2012 | 2 | 1 |
| 2013 | 4 | 9 |
| 2014 | 5 | 10 |
| 2015 | 1 | 3 |
| 2016 | 7 | 5 |
| 2017 | 5 | 7 |
| 2018 | 6 | 6 |
| 2019 | 4 | 2 |
| 2020 | 4 | 3 |
| 2021 | 5 | 7 |
| 2022 | 4 | 5 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Support structure and method of forming a support structure19 May 2026US 12,631,013 B2HC Properties Inc.
- Beaver control device for a culvert23 Sep 2025US 12,421,710 B2
- Lightweight aggregate-based non-steam-cured high-performance pipe culvert and preparation method thereof9 Sep 2025US 12,410,099 B1Kunming Shunhong New Materials Co., Ltd
- Air vent for culvert10 Sep 2024US 12,084,849 B1
- Module and method for managing water and other fluids23 Jan 2024US 11,879,246 B2StormTrap LLC
- Culvert-Clearing System23 Oct 2025US 2025/0326010 A1
- A water-level control unit with a downwardly hanging hinged lower flap portion of a valve element and a floating body connected thereto21 Aug 2025US 2025/0263917 A1
- Beaver control device for a culvert30 Jan 2025US 2025/0034856 A1
- Water channel5 Sep 2024US 2024/0295089 A1
- Perforated box culvert5 Oct 2023US 2023/0313472 A1R.J. Burnside & Associates Limited
Most cited
By later US patents
- Precast concrete culvert system72US 4,993,872 ACon/Span Culvert Systems, Inc. · 1991
- Precast concrete culvert system49US 4,797,030 ACon/Span Culvert Systems, Inc. · 1989
- Precast concrete culvert system48US 4,854,775 ACon/Span Culvert Systems, Inc. · 1989
- Reinforced metal box culvert41US 5,326,191 A1994
- Method of manufacturing prestressed concrete culverts37US 4,953,280 AGifford-Hill & Company, Inc. · 1990