C04B 2111/1087
Carbon free or very low carbon content fly ashes
Official title: {Carbon free or very low carbon content fly ashes; Fly ashes treated to reduce their carbon content or the effect thereof}
C04B2111/1087 (Carbon free or very low carbon content fly ashes) appears on 34 US grants and 57 published applications in this corpus.
Search patents in C04B- Granted patents
- 34
- Published applications
- 57
- Assignees
- 38
- Inventors
- 95
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 5 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 3 |
| 2008 | 0 | 0 |
| 2009 | 2 | 6 |
| 2010 | 0 | 3 |
| 2011 | 6 | 0 |
| 2012 | 0 | 6 |
| 2013 | 2 | 3 |
| 2014 | 3 | 1 |
| 2015 | 3 | 2 |
| 2016 | 3 | 2 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 4 |
| 2021 | 1 | 4 |
| 2022 | 2 | 2 |
| 2023 | 2 | 3 |
| 2024 | 4 | 4 |
| 2025 | 1 | 3 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and systems for controlling carbon burn out7 Oct 2025US 12,435,002 B2Em Resources LLC
- Method and facility for treating fly ash29 Oct 2024US 12,128,422 B2Fives Fcb
- Preform for ceramic matrix composite, method of making a ceramic matrix composite and ceramic matrix composite22 Oct 2024US 12,122,723 B2Rtx Corporation
- Ultralow-carbon clinker-free cement, method for preparing same and application of ultralow-carbon clinker-free cement15 Oct 2024US 12,116,319 B2Hebei University of Technology
- Process for preparing whitened fly ash9 Jul 2024US 12,031,044 B2Vecor IP Holdings Limited
- Production of low carbon hydraulic cement and concrete10 Sep 2026US 2026/0265142 A1
- Non-hydraulically reactive particulate mineral compositions for reducing cement content in concrete4 Jun 2026US 2026/0152436 A1Roman Cement, LLC
- Preform for ceramic matrix composite, method of making a ceramic matrix composite and ceramic matrix composite26 Mar 2026US 2026/0085013 A1Rtx Corporation
- Methods and systems for controlling carbon burn out29 Jan 2026US 2026/0028279 A1Em Resources LLC
- Carbon-Sequestering Concrete Composition with Enhanced CO2 Absorbtion and Method of Manufacturing Thereof7 Aug 2025US 2025/0250199 A1
Most cited
By later US patents
- Method for improving the pozzolanic character of fly ash30US 5,817,230 AUniversity of Kentucky Research Foundation · 1998
- Sacrificial agents for fly ash concrete16US 7,485,184 B2Handy Chemicals Limited · 2009
- Electrically conductive concrete and controlled low strength materials having spent carbon sorbent16US 7,578,881 B2Wisconsin Electric Power Company · 2009
- Carbon removal through partial carbon burn-out from coal ash used in concrete12US 6,783,585 B2Lafarge Canada Inc. · 2004
- Sacrificial agents for fly ash concrete10US 7,892,349 B2Boral Material Technologies Inc. · 2011