B28B 7/225
For making stairs or stair units comprising more than one step
Official title: {for making stairs or stair units comprising more than one step (in situ E04G13/06)}
B28B7/225 (For making stairs or stair units comprising more than one step) appears on 14 US grants and 11 published applications in this corpus.
Search patents in B28B- Granted patents
- 14
- Published applications
- 11
- Assignees
- 12
- Inventors
- 30
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Precast concrete stairway construction method25 Aug 2026US 12,716,243 B2Easycore Co., Ltd.
- Prefabricated stairs modular assembly mold and assembling method thereof15 Jun 2021US 11,034,054 B2Boxia Mining Technology Ltd.
- Method and apparatus for production of precision precast concrete flights of stairs10 Dec 2019US 10,500,760 B2
- Stair edging component15 Oct 2019US 10,443,246 B2Patent Agencies Limited
- Pre-cast monolithic concrete stair with dual edge beams, method and mold16 Dec 2014US 8,910,434 B2Metromont Corporation
- Method for manufacturing a device for a master forming process, device for a master forming process and master forming process29 Jan 2026US 2026/0028780 A1Università Della Svizzera Italiana
- Precast concrete stairway construction method17 Oct 2024US 2024/0344330 A1Easycore Co., Ltd.
- Assembly and method for constructing concrete stairways and steps28 Oct 2021US 2021/0331347 A1
- Prefabricated stairs modular assembly mold and assembling method thereof21 Jan 2021US 2021/0017775 A1Boxia Mining Technology Ltd.
- Method and apparatus for production of precision precast concrete flights of stairs24 Aug 2017US 2017/0239838 A1
Most cited
By later US patents
- Precast concrete stairway module20US 4,248,020 ACanadian Patents and Development Limited · 1981
- Adjustable sheet metal moulds for steel and precast concrete stairs12US 5,511,347 A1996
- Concrete ramp form6US 4,569,500 A1986
- Adjustable mold for casting a concrete stairway5US 5,133,530 A1992
- Steps made easy for concrete only4US 7,185,875 B12007