C04B 18/0445
Synthetic gypsum
Official title: {Synthetic gypsum, e.g. phosphogypsum (gypsum from smoke purification C04B18/064)}
C04B18/0445 (Synthetic gypsum) appears on 12 US grants and 10 published applications in this corpus.
Search patents in C04B- Granted patents
- 12
- Published applications
- 10
- Assignees
- 10
- Inventors
- 45
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 3 |
| 2004 | 0 | 0 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 2 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Efficient sound-absorbing lightweight aggregate cellular concrete, method for preparing the same, and application thereof12 Aug 2025US 12,384,721 B1Shandong University
- High salt gypsum wallboard containing salt absorbents and methods of making same4 Jun 2024US 11,999,658 B2United States Gypsum Company
- Method of preparing recycled cementitious material by phosphogypsum-assisted carbon sequestration pretreatment process27 Feb 2024US 11,912,630 B2Hubei University of Technology
- Conditioning, biotreatment and composting of construction and demolition debris fines20 Jun 2023US 11,679,415 B2Sanexen Environmental Services Inc.
- Construction method for using modified phosphogypsum in roadbed and slope19 May 2020US 10,655,280 B1Institute of Geology and Geophysics, Chinese Academy of Sciences
- Gypsum Panel Containing Reclaimed Gypsum and a Water-Resistant Additive11 Jun 2026US 2026/0159446 A1Gold Bond Building Products, LLC
- Method of preparing recycled cementitious material by phosphogypsum-assisted carbon sequestration pretreatment process30 Nov 2023US 2023/0382790 A1Hubei University of Technology
- High salt gypsum wallboard containing salt absorbents and methods of making same18 May 2023US 2023/0150879 A1United States Gypsum Company
- Conditioning, biotreatment and composting of construction and demolition debris fines25 Feb 2021US 2021/0053091 A1Sanexen Environmental Services Inc.
- Composite material comprising phosphogypsum25 Apr 2019US 2019/0119159 A1Phosphogreen Ltd
Most cited
By later US patents
- Methods and facilities for producing revenue from gypsum-based refuse sites4US 6,846,131 B22005
- Phosphogypsum composition having improved expansion properties2US 5,261,957 AFreeport-McMoRan Resource Partners, Limited Partnership · 1993
- Process for preparing ceramic-like materials and the ceramic-like materials2US 5,683,616 A1997
- Conversion of gypsum stacks to waste containment facilities and related construction and business methods2US 6,595,723 B22003
- Construction method for using modified phosphogypsum in roadbed and slope1US 10,655,280 B1Institute of Geology and Geophysics, Chinese Academy of Sciences · 2020