E03F 5/02
Manhole shafts or other inspection chambers
Official title: Manhole shafts or other inspection chambers (in general E02D29/12); Snow-filling openings; accessories (covers or frames for manholes or the like E02D29/14)
E03F5/02 (Manhole shafts or other inspection chambers) appears on 235 US grants and 149 published applications in this corpus.
Search patents in E03F- Granted patents
- 235
- Published applications
- 149
- Assignees
- 121
- Inventors
- 333
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 2 |
| 2002 | 6 | 4 |
| 2003 | 9 | 3 |
| 2004 | 4 | 5 |
| 2005 | 1 | 3 |
| 2006 | 3 | 7 |
| 2007 | 3 | 2 |
| 2008 | 3 | 4 |
| 2009 | 4 | 2 |
| 2010 | 4 | 4 |
| 2011 | 1 | 2 |
| 2012 | 1 | 5 |
| 2013 | 1 | 3 |
| 2014 | 5 | 8 |
| 2015 | 3 | 5 |
| 2016 | 2 | 6 |
| 2017 | 8 | 6 |
| 2018 | 3 | 6 |
| 2019 | 10 | 9 |
| 2020 | 9 | 12 |
| 2021 | 9 | 11 |
| 2022 | 8 | 11 |
| 2023 | 11 | 2 |
| 2024 | 8 | 8 |
| 2025 | 7 | 11 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E03F 5/021Connection of sewer pipes to manhole shaft101
- E03F 5/025Provided with a liner34
- E03F 5/024Made of plastic material33
- E03F 2005/028Sealing joints between manhole segmentsIndexing code18
- E03F 5/022Partitioned to allow more than one medium to flow through12
- E03F 5/027The bottom made of prefabricated segments12
Recent patents
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- Sewer cap monitoring system21 Jul 2026US 12,687,417 B1QuadSprout Technologies LLC
- Sewerage basin internal drop apparatus and method24 Feb 2026US 12,559,930 B2
- Riser and ingress device assembly for septic tank system13 Jan 2026US 12,523,321 B2Aero-Stream, LLC
- Bonded multilayer manhole liner, method for manufacturing the same, and method of installation1 Oct 2026US 2026/0297920 A1McNeil Technologies, Inc
- Sewer cap monitoring system17 Sep 2026US 2026/0276427 A1QuadSprout Technologies LLC
- Sewer Cap Monitoring System23 Jul 2026US 2026/0210103 A1
- Sewer cap monitoring system23 Jul 2026US 2026/0210748 A1QuadSprout Technologies LLC
- Connector for mainline pipe and outlet pipe12 Mar 2026US 2026/0071710 A1Advanced Drainage Systems, Inc.
Most cited
By later US patents
- Method, apparatus and product for improved pipe-to-manhole sealing68US 3,958,313 AMerchants National Bank of Manchester · 1976
- Seal component for use in on-site poured concrete or plastic tank or box components of fluid distribution systems66US 5,711,536 ATuf-Tite, Inc. · 1998
- Method and apparatus for providing watertight seal for manhole pipe connection64US 4,387,900 AA-Lok Products, Inc. · 1983
- Flexible seal60US 4,426,095 AConcrete Pipe & Products Corp. · 1984
- Floor clean-out assembly56US 4,879,771 A1989