C04B 22/143
Calcium-sulfate
Official title: {Calcium-sulfate}
C04B22/143 (Calcium-sulfate) appears on 54 US grants and 58 published applications in this corpus.
Search patents in C04B- Granted patents
- 54
- Published applications
- 58
- Assignees
- 57
- Inventors
- 217
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 3 | 8 |
| 2019 | 1 | 3 |
| 2020 | 6 | 3 |
| 2021 | 3 | 2 |
| 2022 | 0 | 6 |
| 2023 | 2 | 8 |
| 2024 | 4 | 6 |
| 2025 | 5 | 2 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic binder with low carbon footprint and high early strength18 Aug 2026US 12,709,575 B2ImerTech SAS
- Use of a hydraulic binder containing calcium aluminate for the production of a construction material12 May 2026US 12,623,963 B2ARDEX Group GmbH
- Method for the control of volume expansion of hydraulically setting compositions comprising steel making slag27 Jan 2026US 12,534,407 B2Sika Technology AG
- Combined process of integrating stoping-backfilling and carbon storage13 Jan 2026US 12,523,152 B2Taiyuan University of Technology
- Cement additive7 Oct 2025US 12,435,003 B2Avertana Limited
- Two-component mortar composition with temperature-responsive inhibitor17 Sep 2026US 2026/0274750 A1Hilti Aktiengesellschaft
- Manufacturing method of cured body3 Sep 2026US 2026/0257971 A1The University of Tokyo
- Multifunctional compounds for activation of cement for use in wellbores25 Jun 2026US 2026/0176521 A1Halliburton Energy Services.Inc.
- Concrete composition for water treatment structure having self-healing and waterproofing capabilities by using self-healing admixture and concrete water treatment structure using same28 May 2026US 2026/0146000 A1HUBCON Co., Ltd.
- Blended cements, methods for their manufacture, and use of an admixture to increase performance of blended cements28 May 2026US 2026/0146002 A1Sika Technology AG
Most cited
By later US patents
- Recovery of cement kiln dust through precipitation of calcium sulfate using sulfuric acid solution29US 6,613,141 B22003
- Process for preparing calcium sulfate alpha hemihydrate21US 5,093,093 APromineral Gesellschaft zur Verwendung von Mineralstoffen mbH · 1992
- Gypsum set accelerator and method of making the same18US 6,221,151 B1National Gypsum Company · 2001
- Process for recycling gypsum-based waste material into readily crushable members for use in the manufacture of cement and crushable members formed thereby17US 6,471,767 B1American International Materials, Ltd. · 2002
- Process for preparation of purified calcium sulfate in an aqueous medium15US 5,173,284 ALafarge Coppee · 1992