E04F 2011/021
Mainly of stone or stone like materials
Official title: {mainly of stone or stone like materials, e.g. concrete; mainly of glass}
E04F2011/021 (Mainly of stone or stone like materials) appears on 39 US grants and 41 published applications in this corpus.
Search patents in E04F- Granted patents
- 39
- Published applications
- 41
- Assignees
- 26
- Inventors
- 74
- 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 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 2 | 2 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 2 | 2 |
| 2016 | 2 | 5 |
| 2017 | 4 | 4 |
| 2018 | 2 | 3 |
| 2019 | 4 | 2 |
| 2020 | 2 | 3 |
| 2021 | 4 | 3 |
| 2022 | 0 | 3 |
| 2023 | 4 | 3 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Precast concrete stairway construction method25 Aug 2026US 12,716,243 B2Easycore Co., Ltd.
- Pool stair forms and methods of forming pool stairs7 Jan 2025US 12,188,244 B2Imperial Pools, Inc.
- Load transferring connecting element8 Oct 2024US 12,110,679 B2Svein Berg Holding AS
- Building connection comprising a first building element and a second building element16 Jul 2024US 12,037,784 B2Svein Berg Holding AS
- Prefabricated concrete form with stairs21 Nov 2023US 11,821,202 B2Framing Systems, Inc.
- Pool stair forms and methods of forming pool stairs8 May 2025US 2025/0146309 A1Imperial Pools, Inc.
- Precast concrete stairway construction method17 Oct 2024US 2024/0344330 A1Easycore Co., Ltd.
- Pool stair forms and methods of forming pool stairs30 Nov 2023US 2023/0383557 A1Imperial Pools, Inc.
- A building connection comprising a first building element and a second building element2 Mar 2023US 2023/0067965 A1Svein Berg Holding AS
- Load transferring connecting element23 Feb 2023US 2023/0056986 A1Svein Berg Holding AS
Most cited
By later US patents
- Glass support member48US 7,165,362 B2Apple Computer, Inc. · 2007
- Adjustable stair stringer and railing18US 6,354,403 B12002
- Modular masonry step and deck assembly16US 6,295,772 B1Bend Industries, Inc. · 2001
- Externally reinforced concrete stairs11US 4,250,672 AAmerican Stair Corporation Inc. · 1981
- Adjustable stair stringer and railing8US 6,868,944 B2EZ Stairs, Inc. · 2005