E04B 5/21
Cross-ribbed floors
E04B5/21 (Cross-ribbed floors) appears on 25 US grants and 26 published applications in this corpus.
Search patents in E04B- Granted patents
- 25
- Published applications
- 26
- Assignees
- 15
- Inventors
- 39
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 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 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 1 |
| 2012 | 3 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 3 | 1 |
| 2018 | 2 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Waffle slab and structures and method of manufacturing the same16 Sep 2025US 12,416,151 B2Ruentex Engineering & Construction Co., Ltd.
- Floating foundation6 Aug 2024US 12,054,905 B2
- Thermal insulation plate and its use2 Jul 2024US 12,024,883 B2Ff-Future Oy
- Slab fillers and methods for implementing fillers in two-way concrete slabs for building structures7 Mar 2023US 11,598,091 B2
- Slab fillers and methods for implementing fillers in two-way concrete slabs for building structures25 Aug 2020US 10,753,088 B2Contruss Engineering Co.
- Structural system for building and civil engineering works and construction method25 Dec 2025US 2025/0389116 A1
- Waffle slab and structures and method of manufacturing the same4 Apr 2024US 2024/0109224 A1Ruentex Engineering & Construction Co., Ltd.
- Thermal insulation plate and its use28 Mar 2024US 2024/0102281 A1Finnfoam Oy
- Floor and column structure19 Jan 2023US 2023/0013178 A1
- Floating Foundation12 May 2022US 2022/0145571 A1
Most cited
By later US patents
- Foundation form work23US 4,831,803 A1989
- Variable-geometry modular structure composed of thermo-acoustic caissons, particularly for buildings23US 8,881,483 B22014
- Concrete building structure and method for modular construction of same16US 9,371,648 B12016
- Method and apparatus for forming a formwork for a concrete slab10US 10,066,404 B22018
- Concrete slab foundation and method of construction10US 5,540,524 AGonsalves, Santucci, Inc. · 1996