E04F 17/02
Vertical ducts: for carrying away waste gases
Official title: for carrying away waste gases, e.g. flue gases (free-standing chimneys E04H12/28; connections between fireplace and chimney, chimney fittings, covers for cleaning holes of chimneys F23J; chimney tops F23L); Building elements specially designed therefor, e.g. shaped bricks or sets thereof {(coke-ovens C10B; working measures on existing vertical ducts E04G23/02; apparatus for inserting new lining elements in existing ducts E04G21/16; metallic chimneys, linings, joints and spacers therefor F23J11/00, F23J13/00)}
E04F17/02 (Vertical ducts: for carrying away waste gases) appears on 54 US grants and 42 published applications in this corpus.
Search patents in E04F- Granted patents
- 54
- Published applications
- 42
- Assignees
- 25
- Inventors
- 90
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 5 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 2 |
| 2006 | 1 | 3 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 4 |
| 2017 | 1 | 3 |
| 2018 | 2 | 1 |
| 2019 | 0 | 3 |
| 2020 | 1 | 4 |
| 2021 | 3 | 3 |
| 2022 | 0 | 3 |
| 2023 | 0 | 0 |
| 2024 | 2 | 1 |
| 2025 | 0 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Block with a contoured surface25 Aug 2026US D1,144,982 S1Design
- Pass-through device for a chimney31 Mar 2026US 12,590,701 B2Jeremias Inc.
- Vent assembly28 May 2024US 11,993,454 B2Elmac Technologies Limited
- Roof vent with contoured foot2 Apr 2024US 11,946,263 B2Golden Rule Fasteners, Inc.
- Phenol-furan resin composition7 Dec 2021US 11,192,988 B2
- Wall Thimble Alignment Trim and Wall Thimble Assembly Having an Alignment Trim for a Chimney26 Feb 2026US 2026/0055829 A1Jeremias Inc.
- Vent pipe cap for metal roof23 Oct 2025US 2025/0327315 A1
- Systems and methods for manufacturing precast outdoor fireplaces18 Sep 2025US 2025/0290637 A1Ideal Concrete Block Co.
- Roof vent with contoured foot1 May 2025US 2025/0137267 A1
- Pass-through device for a chimney20 Jun 2024US 2024/0200776 A1Jeremias Inc.
Most cited
By later US patents