E04C 3/26
Prestressed
Official title: prestressed (E04C3/22, E04C3/29 take precedence; prestressing members E04C5/08)
E04C3/26 (Prestressed) appears on 76 US grants and 71 published applications in this corpus.
Search patents in E04C- Granted patents
- 76
- Published applications
- 71
- Assignees
- 59
- Inventors
- 163
- Latest grant
- 18 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 9 |
| 2005 | 4 | 2 |
| 2006 | 5 | 5 |
| 2007 | 2 | 2 |
| 2008 | 1 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 2 |
| 2011 | 1 | 5 |
| 2012 | 2 | 2 |
| 2013 | 1 | 1 |
| 2014 | 2 | 0 |
| 2015 | 1 | 3 |
| 2016 | 1 | 5 |
| 2017 | 3 | 4 |
| 2018 | 4 | 7 |
| 2019 | 2 | 2 |
| 2020 | 8 | 1 |
| 2021 | 2 | 4 |
| 2022 | 3 | 3 |
| 2023 | 1 | 5 |
| 2024 | 4 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Structural truss, assembly and method of manufacture18 Feb 2025US 12,227,945 B2Net Zero Projects Limited
- Variable assembly PC member29 Oct 2024US 12,129,653 B2Euro Engineering Co., Ltd.
- Concrete reinforcement assembly22 Oct 2024US 12,123,192 B2Rioflex IP Pty Ltd
- Concrete ceiling, concrete ceiling elements and method for producing a concrete ceiling and a concrete ceiling element9 Jul 2024US 12,031,315 B2CPC Co., Ltd.
- Cable-supported structural assembly with flexible reinforced concrete structural element2 Jan 2024US 11,859,386 B2
- Assembly22 Jan 2026US 2026/0022530 A1Fsc Technologies LLC
- Anchorage System For Prestressing Non-Metallic Tendons26 Jun 2025US 2025/0207396 A1Rutgers, The State University of New Jersey
- Post-tensioned expanding concrete with fibers for slabs14 Nov 2024US 2024/0376709 A1Ccl Stressing International Ltd
- Post-tensioned concrete with fibers for long strips15 Feb 2024US 2024/0052634 A1Ccl Stressing International Ltd
- Laminated beam slab and preparation method thereof2 Nov 2023US 2023/0349155 A1Fujian University of Technology
Most cited
By later US patents
- Indirectly prestressed, concrete, roof-ceiling construction with flat soffit55US 7,448,170 B2Mara-Institut d.o.o. · 2008
- Reinforcement device for supporting structures37US 6,851,232 B1Sika Schweiz AG · 2005
- Prestressed concrete joist32US 5,671,573 ABoard of Regents, University of Nebraska-Lincoln · 1997
- Method for externally reinforcing girders30US 5,671,572 A1997
- Precast post-tensioned segmental pole system26US 6,851,231 B22005