C04B 11/00
Calcium sulfate cements
C04B11/00 (Calcium sulfate cements) appears on 310 US grants and 305 published applications in this corpus.
Search patents in C04B- Granted patents
- 310
- Published applications
- 305
- Assignees
- 185
- Inventors
- 817
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 12 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 3 |
| 2003 | 3 | 3 |
| 2004 | 4 | 2 |
| 2005 | 1 | 6 |
| 2006 | 1 | 5 |
| 2007 | 3 | 6 |
| 2008 | 3 | 7 |
| 2009 | 6 | 11 |
| 2010 | 11 | 8 |
| 2011 | 6 | 10 |
| 2012 | 6 | 6 |
| 2013 | 9 | 9 |
| 2014 | 6 | 8 |
| 2015 | 8 | 20 |
| 2016 | 8 | 22 |
| 2017 | 12 | 13 |
| 2018 | 12 | 7 |
| 2019 | 16 | 12 |
| 2020 | 10 | 15 |
| 2021 | 13 | 12 |
| 2022 | 6 | 16 |
| 2023 | 13 | 24 |
| 2024 | 11 | 29 |
| 2025 | 12 | 29 |
| 2026 | 19 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C04B 11/02Methods and apparatus for dehydrating gypsum128
- C04B 11/26Strating from chemical gypsum63
- C04B 11/28Mixtures thereof with other inorganic cementitious materials34
- C04B 11/007After-treatment of the dehydration products24
- C04B 11/005Preparing or treating the raw materials17
- C04B 11/002Mixtures of different caso4-modifications14
- C04B 11/05Obtaining anhydrite13
- C04B 11/06Starting from anhydrite3
Recent patents
- Low-cost four-element system cementitious material, preparation method and application thereof6 Oct 2026US 12,753,115 B2University of Science and Technology Beijing
- Air and water barrier building panels15 Sep 2026US 12,734,724 B2Gold Bond Building Products, LLC
- Device for smelting and regenerating phosphogypsum using high-temperature ceramsite and method for using same8 Sep 2026US 12,729,157 B2Hubei Juhai Environmental Technology Co., Ltd.
- Composition for insulating coating8 Sep 2026US 12,729,159 B2Saint-Gobain Isover
- Method and apparatus for making a gypsum board21 Jul 2026US 12,686,149 B2Knauf Gips KG
- Hydraulic composition for ultra-high performance concrete and ultra-high performance grout8 Oct 2026US 2026/0308054 A1Sika Technology AG
- Concrete recycling8 Oct 2026US 2026/0308059 A1
- Gypsum Board Including a Gypsum Core with Crystals Having an Enhanced Aspect Ratio1 Oct 2026US 2026/0296963 A1Gold Bond Building Products, LLC
- Method of Forming a Stucco Composition and Products Formed Therefrom1 Oct 2026US 2026/0296964 A1A.M.N (Natanya) Engineering and Consulting, LTD
- Fire-resistant gypsum boards and sustainable methods for production thereof1 Oct 2026US 2026/0296965 A1United States Gypsum Company
Most cited
By later US patents
- Natural silica-containing cement and concrete composition115US 5,383,967 A1995
- Composite material and method of producing113US 5,320,677 AUnited States Gypsum Company · 1994
- Gypsum moldings as building materials and methods manufacturing the said gypsum moldings101US 4,239,716 ANippon Hardboard Co. Ltd. · 1980
- Submerged combustion calcination69US 4,626,199 AUnited States Gypsum Company · 1986
- Process of producing gypsum wood fiber product having improved water resistance67US 5,817,262 AUnited States Gypsum Company · 1998