E02D 29/149
Annular gaskets
Official title: {Annular gaskets}
E02D29/149 (Annular gaskets) appears on 82 US grants and 47 published applications in this corpus.
Search patents in E02D- Granted patents
- 82
- Published applications
- 47
- Assignees
- 41
- Inventors
- 116
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 3 |
| 2004 | 4 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 3 |
| 2016 | 3 | 5 |
| 2017 | 6 | 2 |
| 2018 | 2 | 5 |
| 2019 | 6 | 5 |
| 2020 | 6 | 4 |
| 2021 | 2 | 2 |
| 2022 | 1 | 2 |
| 2023 | 1 | 2 |
| 2024 | 2 | 5 |
| 2025 | 2 | 3 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sealed hatch assembly for underground enclosure18 Aug 2026US 12,709,859 B2
- Sealing and locking valve box lid14 Jul 2026US 12,680,259 B2Penn-Troy Manufacturing Inc.
- Laminous manway cover gasket6 Jan 2026US 12,516,488 B2Vsp Tech., Inc.
- Insulation disc for septic tank lid23 Sep 2025US 12,421,709 B2
- Reinforced manhole cover gasket3 Jun 2025US 12,320,089 B2Sewer Sentry LLC
- Reinforced manhole cover gasket18 Sep 2025US 2025/0290267 A1Sewer Sentry LLC
- Sealed Hatch Assembly for Underground Enclosure5 Jun 2025US 2025/0179757 A1U.S.F. Fabrication, Inc.
- Active sealing manhole cover for vapor and liquid isolation15 May 2025US 2025/0154740 A1USA Industries, Inc.
- Insulation disc for septic tank lid24 Oct 2024US 2024/0352722 A1
- Laminous manway cover gasket11 Jul 2024US 2024/0229408 A9Vsp Tech., Inc.
Most cited
By later US patents
- Manhole chimney seal72US 4,469,467 AThe Cretex Companies, Inc. · 1984
- Molded pleated gasket and device for installing same on pipe65US 4,103,901 AA-Lok Corporation · 1978
- Manhole cover gasket seal46US 4,440,407 A1984
- Sealing gasket for a roadway manhole38US 4,772,154 APont-A-Mousson S. A. · 1988
- Manhole cover sealing and locking arrangement35US 4,763,449 APont-A-Mousson S. A. · 1988