E04F 2011/0205
Stairways characterised by the use of specific materials for the supporting structure
Official title: {Stairways characterised by the use of specific materials for the supporting structure of the treads}
E04F2011/0205 (Stairways characterised by the use of specific materials for the supporting structure) appears on 102 US grants and 106 published applications in this corpus.
Search patents in E04F- Granted patents
- 102
- Published applications
- 106
- Assignees
- 62
- Inventors
- 190
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 1 |
| 2003 | 3 | 4 |
| 2004 | 0 | 4 |
| 2005 | 2 | 2 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 3 | 2 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 2 | 5 |
| 2015 | 6 | 6 |
| 2016 | 5 | 10 |
| 2017 | 7 | 8 |
| 2018 | 5 | 4 |
| 2019 | 9 | 8 |
| 2020 | 7 | 11 |
| 2021 | 7 | 7 |
| 2022 | 4 | 7 |
| 2023 | 10 | 4 |
| 2024 | 3 | 2 |
| 2025 | 5 | 5 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adjustable stair railing post assembly22 Sep 2026US 12,742,327 B2PrimeSource Building Products, Inc.
- Precast concrete stairway construction method25 Aug 2026US 12,716,243 B2Easycore Co., Ltd.
- Reinforced adjustable stair tray27 Jan 2026US 12,534,919 B2Fortress Iron, LP
- Platform system27 Jan 2026US 12,534,923 B2Safe Rack LLC
- Metal and steel substructure framing systems4 Nov 2025US 12,460,416 B1New Castle Steel Inc.
- Folding staircase10 Sep 2026US 2026/0266060 A1Calbah Industries Pty Ltd
- Modular Mining Escapeway9 Jul 2026US 2026/0193986 A1RAM Enterprise, Inc.
- Stringer connector and staircase11 Jun 2026US 2026/0160070 A1Peak Innovations Inc.
- Platform system11 Jun 2026US 2026/0160071 A1Safe Rack LLC
- Platform system28 May 2026US 2026/0146458 A1Safe Rack LLC
Most cited
By later US patents
- Fiber reinforced plastic (FRP) composite structural system for decks, docks, boardwalks, walkways, spa decks, hot tub decks and gazebos and components therefore and method of making same76US 6,427,403 B12002
- Glass support member48US 7,165,362 B2Apple Computer, Inc. · 2007
- Blow molded articles and method of making26US 6,102,156 AConfer Plastics, Inc. · 2000
- Reinforced fiberglass steps24US 5,794,391 A1998
- Molded plastic stairway and rail structure and method of assembly22US 6,205,722 B1Lone Star Steps Accessories, Inc. · 2001