F22B 25/00
Water-tube boilers built-up from sets of water tubes with internally-arranged flue tubes
Official title: Water-tube boilers built-up from sets of water tubes with internally-arranged flue tubes, or fire tubes, extending through the water tubes
F22B25/00 (Water-tube boilers built-up from sets of water tubes with internally-arranged flue tubes) appears on 5 US grants and 2 published applications in this corpus.
Search patents in F22B- Granted patents
- 5
- Published applications
- 2
- Assignees
- 4
- Inventors
- 15
- Latest grant
- 15 Aug 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 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 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Heating apparatus15 Aug 2017US 9,732,600 B2Exponential Technologies, Inc.
- Composite tube for heating gases4 Apr 1989US 4,817,672 AJogema Holding B.V.
- Process and heat exchanger for cooling gases20 May 1986US 4,589,473 ABorsig GmbH
- Energy conversion system and components thereof1 Nov 1983US 4,412,509 A
- Spiral concentric-tube heat exchanger24 Aug 1976US 3,976,129 A
Most cited
By later US patents
- Spiral concentric-tube heat exchanger37US 3,976,129 A1976
- Composite tube for heating gases14US 4,817,672 AJogema Holding B.V. · 1989
- Process and heat exchanger for cooling gases11US 4,589,473 ABorsig GmbH · 1986
- Energy conversion system and components thereof6US 4,412,509 A1983
- Heating apparatus1US 9,732,600 B2Exponential Technologies, Inc. · 2017