E04C 5/10
Ducts
E04C5/10 (Ducts) appears on 114 US grants and 92 published applications in this corpus.
Search patents in E04C- Granted patents
- 114
- Published applications
- 92
- Assignees
- 52
- Inventors
- 148
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 3 | 0 |
| 2004 | 4 | 5 |
| 2005 | 3 | 1 |
| 2006 | 3 | 3 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 6 | 3 |
| 2011 | 5 | 2 |
| 2012 | 0 | 1 |
| 2013 | 3 | 2 |
| 2014 | 2 | 3 |
| 2015 | 3 | 7 |
| 2016 | 5 | 4 |
| 2017 | 3 | 11 |
| 2018 | 6 | 3 |
| 2019 | 8 | 7 |
| 2020 | 6 | 10 |
| 2021 | 8 | 6 |
| 2022 | 7 | 6 |
| 2023 | 4 | 6 |
| 2024 | 5 | 1 |
| 2025 | 2 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Span to span duct coupler25 Aug 2026US 12,716,237 B2
- Apparatuses and methods for constructing a concrete structure using precast concrete components27 Jan 2026US 12,534,901 B2Tindall Corporation
- Devices, systems, and methods for connecting concrete structural elements14 Oct 2025US 12,442,188 B2Tindall Corporation
- Span to span duct coupler15 Jul 2025US 12,359,430 B2
- Variable assembly PC member29 Oct 2024US 12,129,653 B2Euro Engineering Co., Ltd.
- Concrete structural body, and method for constructing concrete structural body23 Jul 2026US 2026/0210116 A1Sumitomo Electric Industries, Ltd.
- Slab anchor encapsulation assembly26 Mar 2026US 2026/0085520 A1
- Span to span duct coupler6 Nov 2025US 2025/0341095 A1General Technologies Corp.
- Anchorage System For Prestressing Non-Metallic Tendons26 Jun 2025US 2025/0207396 A1Rutgers, The State University of New Jersey
- Stepped closure for duct coupling20 Feb 2025US 2025/0059764 A1
Most cited
By later US patents
- Corrosion protection tube for a post-tension anchor system52US 5,839,235 A1998
- Structural cable for civil engineering works, sheath section for such a cable and method for laying same46US 6,476,326 B1Freyssinet International (STUP) · 2002
- Sealing trumpet for a post-tension anchorage system37US 7,950,196 B12011
- Bonded monostrand post-tension system33US 6,843,031 B12005
- Method for making prefabricated structural elements, and prestressed structure produced with the structural28US 6,389,764 B1Freyssinet International (STUP) · 2002