E04H 12/28
Chimney stacks
Official title: Chimney stacks, e.g. free-standing, or similar ducts (chimneys as part of buildings E04F17/02)
E04H12/28 (Chimney stacks) appears on 46 US grants and 18 published applications in this corpus.
Search patents in E04H- Granted patents
- 46
- Published applications
- 18
- Assignees
- 29
- Inventors
- 83
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 3 | 2 |
| 2014 | 0 | 0 |
| 2015 | 1 | 4 |
| 2016 | 2 | 2 |
| 2017 | 3 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pass-through device for a chimney31 Mar 2026US 12,590,701 B2Jeremias Inc.
- Recyclable cylindrical structure and usage method thereof11 Nov 2025US 12,467,271 B2China National Chemical Engineering No.13 Construction Co.,Ltd
- Inflatable, free-standing solar updraft tower with optimal geometry and active control26 Jun 2018US 10,006,443 B1Stc. Unm
- Aggregate stack demolishing scaffold apparatus and method for demolishing aggregate stack using the apparatus12 Sep 2017US 9,758,984 B2Besterra Co., Ltd.
- Reinforcement assemblies, fixtures, and methods11 Apr 2017US 9,617,704 B2One Energy Enterprises LLC
- Recyclable Cylindrical Structure and Usage Method Thereof18 Jul 2024US 2024/0240488 A1China National Chemical Engineering No.13 Construction Co.,Ltd
- Pass-through device for a chimney20 Jun 2024US 2024/0200776 A1Jeremias Inc.
- Advanced Waste Heat Recovery in Industrial Fired-Heaters31 Oct 2019US 2019/0331347 A1Saudi Arabian Oil Company
- Advanced waste heat recovery in industrial fired-heaters22 Aug 2019US 2019/0257530 A1Saudi Arabian Oil Company
- High altitude structures and related methods15 Dec 2016US 2016/0362885 A1
Most cited
By later US patents
- Modular pillar45US 5,934,035 AAnker Brick Pillars Ltd. · 1999
- Sectional smokestack25US 5,038,540 A1991
- Telescopic flare pipe tower24US 5,490,364 ADreco, Inc. · 1996
- Apparatus and method for forming a reduced weight masonry column17US 5,761,861 A1998
- Method for mounting in sections an annular tower for wind power generator, heliostatic power generator or chimney composed from three concrete segments or more16US 8,555,600 B2Cortina Innovations S.A. de C.V. · 2013