C04B 28/146
Alpha-hemihydrate
Official title: {alpha-hemihydrate}
C04B28/146 (Alpha-hemihydrate) appears on 79 US grants and 71 published applications in this corpus.
Search patents in C04B- Granted patents
- 79
- Published applications
- 71
- Assignees
- 52
- Inventors
- 194
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 2 | 2 |
| 2004 | 0 | 4 |
| 2005 | 2 | 2 |
| 2006 | 2 | 5 |
| 2007 | 3 | 3 |
| 2008 | 3 | 4 |
| 2009 | 1 | 6 |
| 2010 | 9 | 1 |
| 2011 | 6 | 5 |
| 2012 | 2 | 3 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 4 |
| 2018 | 6 | 4 |
| 2019 | 1 | 3 |
| 2020 | 3 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 8 |
| 2023 | 2 | 1 |
| 2024 | 2 | 4 |
| 2025 | 2 | 2 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Use of a hydraulic binder containing calcium aluminate for the production of a construction material12 May 2026US 12,623,963 B2ARDEX Group GmbH
- Synthetic gypsum and gypsum boards produced therefrom5 May 2026US 12,617,719 B2Universal Cement Corporation
- Perlite-free, lightweight setting-type joint compound compositions28 Apr 2026US 12,612,336 B2Knauf Gips KG
- High solids, sprayable setting type joint compound25 Jun 2026US 2026/0176205 A1Knauf Gips KG
- 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
- Self-levelling compound with high moisture resistance11 Sep 2025US 2025/0282685 A1Uzin Utz AG
- Quick-drying levelling compound for decorative floor coverings30 Jan 2025US 2025/0034046 A1Sika Technology AG
Most cited
By later US patents
- Cementitious composition130US 4,494,990 AAsh Grove Cement Company · 1985
- Ready-mixed setting type joint compound115US 5,746,822 AUnited States Gypsum Company · 1998
- Structural sheathing panels109US 6,620,487 B1United States Gypsum Company · 2003
- High performance non-combustible gypsum-cement compositions with enhanced water durability and thermal stability for reinforced cementitious lightweight structural cement panels109US 8,038,790 B1United States Gypsum Company · 2011
- Gypsum moldings as building materials and methods manufacturing the said gypsum moldings101US 4,239,716 ANippon Hardboard Co. Ltd. · 1980