F22B 37/221
Covers for drums, collectors, manholes or the like
Official title: {Covers for drums, collectors, manholes or the like}
F22B37/221 (Covers for drums, collectors, manholes or the like) appears on 64 US grants and 15 published applications in this corpus.
Search patents in F22B- Granted patents
- 64
- Published applications
- 15
- Assignees
- 34
- Inventors
- 111
- Latest grant
- 29 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 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 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 3 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 3 | 2 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Connection tube support of waste heat recovery boiler and waste heat recovery boiler including same29 Oct 2024US 12,130,010 B2Doosanenerbility Co., Ltd.
- Manway relief for a tank car10 Sep 2024US 12,084,095 B2Trinity Tank Car, Inc.
- Oval-shaped metal tank systems2 Jan 2024US 11,859,160 B2Spokane Stainless Technologies, Inc.
- Nozzle for steam injection6 Dec 2022US 11,519,250 B2Variperm Energy Services Inc.
- L-shaped header of steam generator including spiral tube and a coupling structure of L-shaped header and tube21 Dec 2021US 11,204,163 B2King Abdullah City for Atomic and Renewable Energy
- Tube sheet protection in a process gas waste heat boiler13 Feb 2025US 2025/0052414 A1Topsoe A/S
- Manway Relief for a Tank Car12 Dec 2024US 2024/0409132 A1Trinity Tank Car, Inc.
- Connection tube support of waste heat recovery boiler and waste heat recovery boiler including same30 May 2024US 2024/0175572 A1Doosan Enerbility Co., Ltd.
- Manway relief for a tank car22 Jul 2021US 2021/0221409 A1Trinity Tank Car, Inc.
- Oval-Shaped Metal Tank Systems24 Jun 2021US 2021/0189307 A1Spokane Industries
Most cited
By later US patents
- Dual seal nozzle dam and alignment means therefor55US 4,671,326 AWestinghouse Electric Corp. · 1987
- Nozzle dam translocating system36US 4,959,192 ATennesse Valley Authority · 1990
- Nozzle dam remote installation system and technique36US 5,042,861 ATennessee Valley Authority · 1991
- Nozzle dam remote installation system and technique34US 4,989,818 ATennessee Valley Authority · 1991
- Nozzle dam remote installation system and technique34US 5,006,302 ATennessee Valley Authority · 1991