E03F 3/046
Open sewage channels
Official title: {Open sewage channels}
E03F3/046 (Open sewage channels) appears on 171 US grants and 147 published applications in this corpus.
Search patents in E03F- Granted patents
- 171
- Published applications
- 147
- Assignees
- 77
- Inventors
- 253
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 3 |
| 2004 | 2 | 10 |
| 2005 | 3 | 11 |
| 2006 | 4 | 4 |
| 2007 | 4 | 5 |
| 2008 | 3 | 6 |
| 2009 | 5 | 5 |
| 2010 | 3 | 6 |
| 2011 | 3 | 7 |
| 2012 | 3 | 3 |
| 2013 | 4 | 3 |
| 2014 | 6 | 6 |
| 2015 | 0 | 6 |
| 2016 | 6 | 7 |
| 2017 | 5 | 5 |
| 2018 | 9 | 10 |
| 2019 | 9 | 11 |
| 2020 | 3 | 3 |
| 2021 | 7 | 8 |
| 2022 | 5 | 7 |
| 2023 | 5 | 7 |
| 2024 | 6 | 8 |
| 2025 | 4 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Linear drain assembly4 Nov 2025US 12,460,401 B2Kohler Co.
- Trench system30 Sep 2025US 12,428,829 B2PKG Equipment Inc.
- Channel-retaining device, drainage system and method19 Aug 2025US 12,392,123 B2Aco Ahlmann SE & Co. KG
- Drainage apparatus with locking mechanism21 May 2026US 2026/0139466 A1Advanced Drainage Systems, Inc.
- Drain channel and inlay assembly26 Feb 2026US 2026/0055593 A1
- Systems and methods for a modular drainage system21 Aug 2025US 2025/0263916 A1
- Balcony egde drainage system7 Aug 2025US 2025/0250786 A1Hydrovim IP Pty Ltd
- Tile floor drain30 Jan 2025US 2025/0034855 A1
Most cited
By later US patents
- 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
- Trench drain system72US 5,529,436 ATuf-Tite, Inc. · 1996
- Gutter seal63US 4,954,015 AGSW Inc. · 1990