F23C 3/002
The chamber having an elongated tubular form
Official title: {the chamber having an elongated tubular form, e.g. for a radiant tube}
F23C3/002 (The chamber having an elongated tubular form) appears on 223 US grants and 238 published applications in this corpus.
Search patents in F23C- Granted patents
- 223
- Published applications
- 238
- Assignees
- 189
- Inventors
- 616
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 9 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 2 |
| 2003 | 3 | 3 |
| 2004 | 2 | 2 |
| 2005 | 2 | 6 |
| 2006 | 2 | 9 |
| 2007 | 3 | 6 |
| 2008 | 1 | 10 |
| 2009 | 2 | 13 |
| 2010 | 5 | 12 |
| 2011 | 6 | 13 |
| 2012 | 3 | 12 |
| 2013 | 6 | 4 |
| 2014 | 10 | 8 |
| 2015 | 6 | 14 |
| 2016 | 2 | 16 |
| 2017 | 10 | 10 |
| 2018 | 7 | 16 |
| 2019 | 12 | 13 |
| 2020 | 12 | 12 |
| 2021 | 11 | 5 |
| 2022 | 7 | 15 |
| 2023 | 4 | 9 |
| 2024 | 12 | 9 |
| 2025 | 9 | 13 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Heat injection process368US 5,255,742 AShell Oil Company · 1993
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