C21D 8/08
For concrete reinforcement
Official title: for concrete reinforcement
C21D8/08 (For concrete reinforcement) appears on 33 US grants and 29 published applications in this corpus.
Search patents in C21D- Granted patents
- 33
- Published applications
- 29
- Assignees
- 28
- Inventors
- 107
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 2 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 3 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 2 | 5 |
| 2024 | 0 | 1 |
| 2025 | 5 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars21 Apr 2026US 12,606,882 B2Danieli & C. Officine Meccaniche SpA
- Wire rod for concrete reinforcing steel fiber, steel fiber, and manufacturing method therefor24 Feb 2026US 12,559,809 B2Posco
- Ultra-high-strength reinforcing bar and manufacturing method thereof16 Dec 2025US 12,497,669 B2Hyundai Steel Company
- Wire rod for high-strength steel fiber, high-strength steel fiber, and method for manufacturing same9 Sep 2025US 12,410,489 B2Posco
- Systems and methods for corrosion resistant stainless steel coatings22 Jul 2025US 12,365,991 B2Allium Engineering, Inc.
- Concrete-reinforcing steel fiber wire rod not undergoing heat treatment, steel fiber, and manufacturing methods therefor23 Jul 2026US 2026/0210115 A1Posco
- Compositions and methods for corrosion-resistant ferritic stainless steel23 Oct 2025US 2025/0327188 A1
- Apparatus, compositions, and methods for stainless-coated steel reinforcement bar24 Jul 2025US 2025/0236956 A1Allium Engineering, Inc.
- Corrosion-resistant alloy steel bar and preparation method therefor26 Jun 2025US 2025/0207230 A1Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
- Ultra-high-strength reinforcing bar and manufacturing method thereof24 Apr 2025US 2025/0129446 A1Hyundai Steel Company
Most cited
By later US patents
- Process for the production of prestressed steels and its named product12US 5,358,578 A1994
- Method for producing rolled steel products, particularly threaded steel tension members10US 4,877,463 ADyckerhoff & Widmann Aktiengesellschaft · 1989
- Process for forming ferrous billets into finished product8US 4,060,428 AMorgan Construction Company · 1977
- Clad steel rolled section for reinforcing concrete and method of production8US 6,663,984 B2Zakrytoe Aktsionerone Obschestvo “Transkom” · 2003
- Method of producing reinforcing bars with corrosion resistant coating6US 4,242,150 A1980