F22D 1/04
The tubes having plain outer surfaces
Official title: the tubes having plain outer surfaces, e.g. in vertical arrangement
F22D1/04 (The tubes having plain outer surfaces) appears on 19 US grants and 14 published applications in this corpus.
Search patents in F22D- Granted patents
- 19
- Published applications
- 14
- Assignees
- 20
- Inventors
- 51
- Latest grant
- 23 Mar 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 5 |
| 2016 | 3 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 4 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Exhaust powered liquid evaporator apparatus and method23 Mar 2021US 10,955,130 B1Marine Turbine Technologies, LLC
- Exhaust gas latent heat recovery device24 Dec 2019US 10,514,183 B2Mitsubishi Hitachi Power Systems, Ltd.
- Steam generation apparatus and associated control system and methods for providing venting21 May 2019US 10,295,174 B2Skavis Corporation
- RSC external downcomer tube arrangement19 Mar 2019US 10,234,210 B2General Electric Company
- Boiler system comprising an integrated economizer5 Feb 2019US 10,197,266 B2Thermodesign, Inc.
- Gas-fired steam-injection boiler for oil field24 Oct 2024US 2024/0353095 A1China Petroleum & Chemical Corporation
- Exhaust gas latent heat recovery device31 May 2018US 2018/0149388 A1Mitsubishi Hitachi Power Systems, Ltd.
- Rsc external downcomer tube arrangement1 Mar 2018US 2018/0058762 A1General Electric Company
- Steam generation apparatus and associated control system and methods for providing a desired injection pressure4 Aug 2016US 2016/0223189 A1Skavis Corporation
- Steam generation apparatus and associated control system and methods for providing venting4 Aug 2016US 2016/0223190 A1Skavis Corporation
Most cited
By later US patents
- Boiler economizer and control system18US 5,419,285 AHenry Vogt Machine Co. · 1995
- Economizer15US 4,031,862 A1977
- Waste energy hot water heater13US 4,122,801 A1978
- Single drum all-welded boiler13US 4,442,800 AThe Babcock & Wilcox Company · 1984
- Economizer system10US 5,787,844 AAhlstrom Machinery Inc. · 1998