C04B 11/02
Methods and apparatus for dehydrating gypsum
Official title: {Methods and apparatus for} dehydrating gypsum {(for other purposes than cement manufacture C01F11/466)}
C04B11/02 (Methods and apparatus for dehydrating gypsum) appears on 128 US grants and 102 published applications in this corpus.
Search patents in C04B- Granted patents
- 128
- Published applications
- 102
- Assignees
- 63
- Inventors
- 285
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
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| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
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| 1994 | 1 | 0 |
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| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 3 |
| 2004 | 3 | 2 |
| 2005 | 1 | 5 |
| 2006 | 1 | 2 |
| 2007 | 2 | 4 |
| 2008 | 3 | 6 |
| 2009 | 4 | 8 |
| 2010 | 8 | 5 |
| 2011 | 5 | 6 |
| 2012 | 3 | 1 |
| 2013 | 4 | 0 |
| 2014 | 0 | 4 |
| 2015 | 3 | 3 |
| 2016 | 2 | 1 |
| 2017 | 2 | 2 |
| 2018 | 3 | 2 |
| 2019 | 3 | 6 |
| 2020 | 2 | 2 |
| 2021 | 4 | 4 |
| 2022 | 2 | 2 |
| 2023 | 3 | 6 |
| 2024 | 1 | 8 |
| 2025 | 2 | 11 |
| 2026 | 5 | 7 |
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
- 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.
- Plaster formula with increased porosity2 Jun 2026US 12,643,818 B2Knauf Gips KG
- 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
- Method of Forming a Stucco Composition and Products Formed Therefrom1 Oct 2026US 2026/0296964 A1A.M.N (Natanya) Engineering and Consulting, LTD
- Systems and methods for manufacturing calcined gypsum with reduced particle size and manufacturing gypsum board with same10 Sep 2026US 2026/0265129 A1United States Gypsum Company
- Systems and methods for manufacturing calcined gypsum and manufacturing gypsum board with material handling chute having in-line measurement device6 Aug 2026US 2026/0225962 A1United States Gypsum Company
- Gypsum calcining apparatuses and methods23 Jul 2026US 2026/0209115 A1United States Gypsum Company
- Process for recovering plaster waste and installation for carrying out such a process9 Jul 2026US 2026/0193132 A1Holding Ritleng
Most cited
By later US patents
- Composite material and method of producing113US 5,320,677 AUnited States Gypsum Company · 1994
- 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
- Method of manufacturing carbon-rich product and co-products56US 9,121,606 B22015
- Method for multi-stage calcining of gypsum to produce an anhydrite product35US 5,954,497 AUSG Corporation · 1999