F27D 1/1808
Removable covers
Official title: {Removable covers}
F27D1/1808 (Removable covers) appears on 171 US grants and 73 published applications in this corpus.
Search patents in F27D- Granted patents
- 171
- Published applications
- 73
- Assignees
- 123
- Inventors
- 340
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 9 | 0 |
| 1988 | 0 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 2 |
| 2002 | 2 | 5 |
| 2003 | 3 | 4 |
| 2004 | 3 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 1 |
| 2011 | 1 | 6 |
| 2012 | 0 | 2 |
| 2013 | 2 | 3 |
| 2014 | 3 | 5 |
| 2015 | 0 | 4 |
| 2016 | 5 | 1 |
| 2017 | 3 | 2 |
| 2018 | 3 | 5 |
| 2019 | 3 | 2 |
| 2020 | 3 | 6 |
| 2021 | 1 | 0 |
| 2022 | 2 | 3 |
| 2023 | 5 | 4 |
| 2024 | 2 | 3 |
| 2025 | 2 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Drive shaft assembly for a rotary furnace21 Jul 2026US 12,687,340 B2X-energy, LLC
- Highly-insulated ingot mold28 Apr 2026US 12,611,795 B2HarbisonWalker International Holdings, Inc.
- Spray-cooled furnace roof with gravity drain14 Oct 2025US 12,442,596 B2Systems Spray-Cooled, Inc.
- Metallurgical furnace having an integrated off-gas hood6 May 2025US 12,292,237 B2Systems Spray-Cooled, Inc.
- Split roof for a metallurgical furnace10 Dec 2024US 12,163,738 B2Systems Spray-Cooled, Inc.
- Heat treatment apparatus8 Oct 2026US 2026/0309423 A1Tokyo Electron Limited
- Furnace tube and control method therefor10 Sep 2026US 2026/0266547 A1Changzhou S.C Exact Equipment Co., Ltd.
- Ovens for equipment such as die attach systems, flip chip bonding systems, clip attach systems, and related methods6 Aug 2026US 2026/0225171 A1Kulicke and Soffa Industries, Inc.
- Spray-cooled furnace roof with gravity drain22 Jan 2026US 2026/0022890 A1Systems Spray-Cooled, Inc.
- Melting furnace and method for melting metal by means of an electrically heatable immersion heating element11 Dec 2025US 2025/0377162 A1
Most cited
By later US patents
- Support mechanism and substrate processing apparatus285US 9,803,926 B2Tokyo Electron Limited · 2017
- Lid and containment vessel for refining molten metal114US 5,718,416 APyrotek, Inc. · 1998
- Automated top head and stem guide assembly for coking drums50US 5,092,963 AAtlantic Richfield Company · 1992
- Safety device for the cover of a metallurgical vessel43US 4,526,353 A1985
- Vessel for metal smelting furnace39US 4,207,060 ADemag Aktiengesellschaft · 1980