E03F 3/04
Pipes or fittings specially adapted to sewers
Official title: Pipes or fittings specially adapted to sewers (manufacture of concrete tubes B28; pipes or pipe fittings in general F16L)
E03F3/04 (Pipes or fittings specially adapted to sewers) appears on 313 US grants and 279 published applications in this corpus.
Search patents in E03F- Granted patents
- 313
- Published applications
- 279
- Assignees
- 160
- Inventors
- 501
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 8 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 13 | 0 |
| 1995 | 9 | 0 |
| 1996 | 13 | 0 |
| 1997 | 10 | 0 |
| 1998 | 10 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 6 | 2 |
| 2002 | 2 | 2 |
| 2003 | 4 | 4 |
| 2004 | 3 | 15 |
| 2005 | 4 | 11 |
| 2006 | 7 | 6 |
| 2007 | 4 | 7 |
| 2008 | 4 | 9 |
| 2009 | 6 | 7 |
| 2010 | 3 | 8 |
| 2011 | 3 | 13 |
| 2012 | 4 | 10 |
| 2013 | 9 | 10 |
| 2014 | 13 | 15 |
| 2015 | 8 | 10 |
| 2016 | 8 | 13 |
| 2017 | 11 | 15 |
| 2018 | 11 | 19 |
| 2019 | 16 | 16 |
| 2020 | 9 | 11 |
| 2021 | 10 | 16 |
| 2022 | 15 | 18 |
| 2023 | 10 | 12 |
| 2024 | 11 | 15 |
| 2025 | 10 | 9 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flared end ramp with side tabs2 Jun 2026US 12,644,271 B2Advanced Drainage Systems, Inc.
- Drainage assembly having an end cap and ramp12 May 2026US 12,624,540 B2Advanced Drainage Systems, Inc.
- Sewerage basin internal drop apparatus and method24 Feb 2026US 12,559,930 B2
- Linear or trench drain systems10 Feb 2026US 12,546,102 B2Advanced Drainage Systems, Inc.
- Trench drains with suspended grates27 Jan 2026US 12,534,899 B2Midwest Design Group
- Drainage apparatus with locking mechanism21 May 2026US 2026/0139466 A1Advanced Drainage Systems, Inc.
- Nesting universal inline surface drain30 Apr 2026US 2026/0117508 A1Advanced Drainage Systems, Inc.
- Plumbing fitting and seat2 Apr 2026US 2026/0092666 A1
- Connector for mainline pipe and outlet pipe12 Mar 2026US 2026/0071710 A1Advanced Drainage Systems, Inc.
- Drain channel and inlay assembly26 Feb 2026US 2026/0055593 A1
Most cited
By later US patents
- Water cutoff junction member for concrete products to be joined together198US 6,052,960 AYamax Corporation · 2000
- Method of lining a pipe194US 4,009,063 AInsituform (Pipes & Structures) Ltd. · 1977
- Chemical safety conduit or trench91US 4,940,359 AACO Polymer Products, Inc. · 1990
- Modular and componential trench drain system82US 5,066,165 A1991
- Chemical safety trench drain conduit75US 5,213,438 AACO Polymer Products, Inc. · 1993