F27D 1/025
Roofs supported around their periphery
Official title: {Roofs supported around their periphery, e.g. arched roofs}
F27D1/025 (Roofs supported around their periphery) appears on 32 US grants and 22 published applications in this corpus.
Search patents in F27D- Granted patents
- 32
- Published applications
- 22
- Assignees
- 29
- Inventors
- 80
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 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 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 3 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 2 |
| 2015 | 1 | 1 |
| 2016 | 1 | 5 |
| 2017 | 0 | 0 |
| 2018 | 3 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 1 | 1 |
| 2022 | 2 | 3 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Coke oven roof repair or replacement24 Feb 2026US 12,559,683 B2Paul Wurth S. A.
- Cover plate structure for glass fiber tank furnace forehearth4 Feb 2025US 12,215,049 B2Jushi Group Co., Ltd.
- Refractory furnace structure24 Oct 2023US 11,796,253 B2
- Convertible metallurgical furnace and modular metallurgical plant comprising said furnace for conducting production processes for the production of metals in the molten state, in particular steel or cast iron19 Jul 2022US 11,391,515 B2Tenova Industrial Technologies (Beijing) Co., Ltd.
- Refractory furnace structure29 Mar 2022US 11,287,188 B2
- Coke oven roof repair or replacement9 Oct 2025US 2025/0313756 A1Paul Wurth S. A.
- Refractory furnace structure14 Jul 2022US 2022/0221224 A1
- Wood-burning oven16 Jun 2022US 2022/0183304 A1
- Cover plate structure for glass fiber tank furnace forehearth31 Mar 2022US 2022/0098079 A1Jushi Group Co., Ltd.
- Refractory furnace structure16 Dec 2021US 2021/0389052 A1
Most cited
By later US patents
- Keystone set13US 5,069,015 ARadex-Heraklith Industriebeteiligungs Aktiengesellschaft · 1991
- Electric oven7US 10,912,307 B2MORETTI FORNl S.P.A. · 2021
- Multiple hearth furnace chamber6US 4,505,210 AZimpro Inc. · 1985
- Supporting structures for furnace crowns6US 4,539,919 AS.I.T.I. Societa Impianti Termoelettrici Industriali S.p.A. · 1985
- Flat separation floor between two superposed chambers in kilns, in particular roller-hearth kilns for ceramic tiles5US 4,923,397 AT.T.C. Termo Tecnica Ceramica S.P.A. · 1990