C04B 28/145
Calcium sulfate hemi-hydrate with a specific crystal form
Official title: {Calcium sulfate hemi-hydrate with a specific crystal form}
C04B28/145 (Calcium sulfate hemi-hydrate with a specific crystal form) appears on 306 US grants and 364 published applications in this corpus.
Search patents in C04B- Granted patents
- 306
- Published applications
- 364
- Assignees
- 130
- Inventors
- 713
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 6 |
| 2003 | 4 | 5 |
| 2004 | 6 | 14 |
| 2005 | 7 | 10 |
| 2006 | 5 | 20 |
| 2007 | 5 | 10 |
| 2008 | 7 | 14 |
| 2009 | 9 | 15 |
| 2010 | 22 | 11 |
| 2011 | 13 | 20 |
| 2012 | 15 | 10 |
| 2013 | 9 | 12 |
| 2014 | 13 | 18 |
| 2015 | 10 | 13 |
| 2016 | 7 | 9 |
| 2017 | 13 | 20 |
| 2018 | 16 | 15 |
| 2019 | 8 | 20 |
| 2020 | 15 | 11 |
| 2021 | 9 | 12 |
| 2022 | 5 | 20 |
| 2023 | 8 | 16 |
| 2024 | 11 | 26 |
| 2025 | 16 | 26 |
| 2026 | 15 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air and water barrier building panels15 Sep 2026US 12,734,724 B2Gold Bond Building Products, LLC
- Method for manufacturing a lightweight veneer system9 Jun 2026US 12,649,288 B2
- Coated gypsum set stabilizing particles having a hydrophobic gypsum core, gypsum board including same, process for making the particles, and process for making the gypsum board9 Jun 2026US 12,649,692 B2Knauf Gips KG
- Plaster formula with increased porosity2 Jun 2026US 12,643,818 B2Knauf Gips KG
- Gypsum based building material2 Jun 2026US 12,643,823 B2Knauf Gips KG
- Gypsum boards and methods of making them25 Jun 2026US 2026/0176201 A1CertainTeed Gypsum, Inc.
- High solids, sprayable setting type joint compound25 Jun 2026US 2026/0176205 A1Knauf Gips KG
- Hardened gypsum body, and preparation method therefor and use thereof11 Jun 2026US 2026/0158703 A1Hubei Juhai Environmental Technology Co., Ltd.
- Underlayment material composition and methods of preparing and applying the same19 Mar 2026US 2026/0078058 A1Onx, Inc.
- Plasterboard and manufacture thereof5 Mar 2026US 2026/0062358 A1Saint-Gobain Placo
Most cited
By later US patents
- Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it194US 6,342,284 B12002
- Cementing oil and gas wells using converted drilling fluid181US 4,883,125 AAtlantic Richfield Company · 1989
- Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it150US 6,632,550 B1United States Gypsum Company · 2003
- Cementitious composition130US 4,494,990 AAsh Grove Cement Company · 1985
- Ready-mixed setting type joint compound115US 5,746,822 AUnited States Gypsum Company · 1998