E04F 17/00
Vertical ducts
Official title: Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D {; drainage devices in floors E03F5/04; roof drainage E04D13/04})
E04F17/00 (Vertical ducts) appears on 532 US grants and 448 published applications in this corpus.
Search patents in E04F- Granted patents
- 532
- Published applications
- 448
- Assignees
- 239
- Inventors
- 861
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 10 | 0 |
| 1978 | 10 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 10 | 0 |
| 1988 | 7 | 0 |
| 1989 | 16 | 0 |
| 1990 | 10 | 0 |
| 1991 | 17 | 0 |
| 1992 | 15 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 11 | 0 |
| 1999 | 8 | 0 |
| 2000 | 4 | 0 |
| 2001 | 10 | 6 |
| 2002 | 13 | 11 |
| 2003 | 11 | 20 |
| 2004 | 7 | 24 |
| 2005 | 18 | 29 |
| 2006 | 7 | 17 |
| 2007 | 9 | 19 |
| 2008 | 10 | 15 |
| 2009 | 7 | 15 |
| 2010 | 12 | 12 |
| 2011 | 18 | 17 |
| 2012 | 13 | 17 |
| 2013 | 14 | 10 |
| 2014 | 17 | 16 |
| 2015 | 19 | 23 |
| 2016 | 17 | 25 |
| 2017 | 16 | 17 |
| 2018 | 19 | 21 |
| 2019 | 17 | 22 |
| 2020 | 20 | 21 |
| 2021 | 11 | 27 |
| 2022 | 15 | 14 |
| 2023 | 16 | 9 |
| 2024 | 13 | 19 |
| 2025 | 13 | 10 |
| 2026 | 9 | 12 |
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
- Process for manufacturing lightweight and durable window well18 Aug 2026US 12,709,075 B2Rockwell LLC
- Duct assemblies11 Aug 2026US 12,703,985 B2EZ-Duct, Inc.
- Mechanical chute for kitchen food waste removal and containment14 Jul 2026US 12,680,317 B1
- Adjustable floor drain9 Jun 2026US 12,650,010 B2Zurn Water, LLC
- Method for Creating a Multi-Floor Building Comprising an Elevator System1 Oct 2026US 2026/0296837 A1Inventio AG
- Platform for an elevator system for a building which is under construction6 Aug 2026US 2026/0225855 A1Inventio AG
- Ventilated structural panels and method of construction with ventilated structural panels6 Aug 2026US 2026/0226740 A1
- Pre-Cast Elevator Pit and Sump Pit30 Jul 2026US 2026/0218525 A1County Prestress and Precast, LLC
- Tent beam skeleton for outdoor louver tent and outdoor louver tent4 Jun 2026US 2026/0152950 A1Linhai Chiyang Leisure Products Co., Ltd.
Most cited
By later US patents
- System to prevent spread of fire and smoke through wall-breaching utility holes196US 5,456,050 AConstruction Consultants & Contractors, Inc. · 1995
- Board floors162US 4,612,745 A1986
- Interior shaft wall construction153US 5,950,385 A1999
- Fire safety device151US 5,155,957 ANational Improvement Company, Inc. · 1992
- Raceway assembly for power and communications conductors120US 5,336,849 AThe Wiremold Company · 1994