C04B 11/26
Strating from chemical gypsum
Official title: {strating from chemical gypsum}; starting from phosphogypsum or from waste, e.g. purification products of smoke (C04B11/02 takes precedence; chemical purification of smoke, fumes or exhaust gases B01D53/00 {purification of gypsum C01F11/46})
C04B11/26 (Strating from chemical gypsum) appears on 63 US grants and 63 published applications in this corpus.
Search patents in C04B- Granted patents
- 63
- Published applications
- 63
- Assignees
- 69
- Inventors
- 241
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 3 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 3 |
| 2020 | 1 | 1 |
| 2021 | 2 | 4 |
| 2022 | 1 | 4 |
| 2023 | 3 | 9 |
| 2024 | 2 | 13 |
| 2025 | 5 | 4 |
| 2026 | 8 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- 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.
- Synthetic gypsum and gypsum boards produced therefrom5 May 2026US 12,617,719 B2Universal Cement Corporation
- Method for preparing cementing material by sintering activation of coal gangue5 May 2026US 12,617,721 B2Central South University
- Integrated method for the commercial and industrial utilisation of calcium sulphate whilst obtaining rare earth elements from the production of phosphoric acid28 Apr 2026US 12,612,309 B2thyssenkrupp AG
- Concrete recycling8 Oct 2026US 2026/0308059 A1
- Composition for adjusting of air pores in building products in the presence of sulfate-based superplasticizers1 Oct 2026US 2026/0296976 A1BASF SE
- Synthesis of cement from alternative raw materials and fuels that reduces or eliminates co2 emissions6 Aug 2026US 2026/0225957 A1Batuga Tech LLC
- Process for recovering plaster waste and installation for carrying out such a process9 Jul 2026US 2026/0193132 A1Holding Ritleng
- Fire resistant gypsum panels, and methods7 May 2026US 2026/0125318 A1Georgia-Pacific Gypsum LLC
Most cited
By later US patents
- Agglomeration of gypsum, limestone, or gypsum-limestone mix57US 4,954,134 ATennessee Valley Authority · 1990
- Process and apparatus for producing fiber-reinforced plaster plates55US 5,520,779 ABabcock BSH Aktiengesellschaft Vormals Buttner-Schilde-Haas AG · 1996
- Process for disposal of arsenic salts40US 4,118,243 AWaste Management of Illinois, Inc. · 1978
- Crystalline calcium sulfate dihydrate and process for making same24US 4,183,908 ASouthern California Edison Company · 1980
- Process for gasification of coal and organic solid wastes21US 4,274,839 A1981