C21D 9/673
Details, accessories, or equipment peculiar to bell-type furnaces
C21D9/673 (Details, accessories, or equipment peculiar to bell-type furnaces) appears on 60 US grants and 18 published applications in this corpus.
Search patents in C21D- Granted patents
- 60
- Published applications
- 18
- Assignees
- 30
- Inventors
- 83
- Latest grant
- 21 Jul 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 2 |
| 2016 | 3 | 3 |
| 2017 | 1 | 0 |
| 2018 | 2 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Heating furnace for heating annular component21 Jul 2020US 10,718,570 B2Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd.
- Jig and heating apparatus with a jig15 Oct 2019US 10,443,108 B2Neturen Co., Ltd.
- Heating apparatus, heat treatment apparatus, and heating method27 Mar 2018US 9,926,616 B2Neturen Co., Ltd.
- Insulation enclosure with compliant independent members20 Feb 2018US 9,896,886 B2Halliburton Energy Services.Inc.
- Batch annealing furnace for coils28 Mar 2017US 9,605,331 B2Jfe Steel Corporation
- Device for tempering an object6 Feb 2025US 2025/0044030 A1EBNER Industrieofenbau GmbH
- Heating furnace for heating annular component3 Jan 2019US 2019/0003771 A1Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd.
- Insulation enclosure with compliant independent members20 Oct 2016US 2016/0305191 A1Halliburton Energy Services.Inc.
- Heating apparatus, heat treatment apparatus, and heating method19 May 2016US 2016/0138121 A1Neturen Co., Ltd.
- Heating apparatus, heat treatment apparatus, and heating method19 May 2016US 2016/0138124 A1Neturen Co., Ltd.
Most cited
By later US patents
- Insulated furnace door and wall panel system72US 5,483,548 A1996
- Batch coil annealing furnace baseplate31US 4,310,302 AMidland-Ross Corporation · 1982
- Diffuser system for annealing furnace19US 4,516,758 A1985
- Refractory insulation mounting system and insulated structures18US 4,647,022 A1987
- Cooling apparatus for diffusers17US 4,287,940 A1981