F23N 2231/24
Freezing
F23N2231/24 (Freezing) appears on 2 US grants and 4 published applications in this corpus.
Search patents in F23N- Granted patents
- 2
- Published applications
- 4
- Assignees
- 3
- Inventors
- 4
- Latest grant
- 19 Jun 2012
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 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 | 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 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- System for preventing snow or ice blockages in exhaust and intake conduits13 Oct 2016US 2016/0298336 A1
- Method for preventing coagulation in exhaust pipe of boiler16 Dec 2010US 2010/0316963 A1Kyungdong Navien Co., Ltd.
- Controlling a Gas-Fired Heater30 Sep 2010US 2010/0248170 A1Sure Fire Pilotless Burner Systems LLC
- Method, apparatus and system for controlling a gas-fired heater3 Aug 2006US 2006/0172238 A1
Most cited
By later US patents