F22B 37/223
Boiler plugs
Official title: {Boiler plugs, e.g. for handholes}
F22B37/223 (Boiler plugs) appears on 4 US grants and 6 published applications in this corpus.
Search patents in F22B- Granted patents
- 4
- Published applications
- 6
- Assignees
- 6
- Inventors
- 12
- Latest grant
- 26 Aug 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Inspection hole plug26 Aug 2014US 8,817,938 B2Mitsubishi Heavy Industries, Ltd.
- Temporary plug cover for hole or port in steam generator of nuclear power plant16 Dec 2003US 6,662,759 B2
- Nuclear steam generator wrapper closure assembly and method of installing same5 Oct 1993US 5,251,241 AWestinghouse Electric Corp.
- Flow blocker for access opening14 Apr 1992US 5,104,611 ACombustion Engineering, Inc.
- Tube sheet protection in a process gas waste heat boiler13 Feb 2025US 2025/0052414 A1Topsoe A/S
- Boiler with flat horizontal tubes9 Oct 2014US 2014/0299074 A1Jae Eun Nor
- Inspection hole plug19 Jan 2012US 2012/0014492 A1Mitsubishi Heavy Industries, Ltd.
- Boiler with flat horizontal tubes10 Jun 2010US 2010/0139578 A1
- Device and method for shutting off an orifice of a bundle wrapper of a steam generator of a pressurized-water nuclear reactor5 Mar 2009US 2009/0060110 A1Areva Np
Most cited
By later US patents