C04B 7/00
Hydraulic cements
Official title: Hydraulic cements (calcium sulfate cements C04B11/00)
C04B7/00 (Hydraulic cements) appears on 1,910 US grants and 1,766 published applications in this corpus.
Search patents in C04B- Granted patents
- 1,910
- Published applications
- 1,766
- Assignees
- 967
- Inventors
- 4,278
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 42 | 0 |
| 1978 | 50 | 0 |
| 1979 | 22 | 0 |
| 1980 | 42 | 0 |
| 1981 | 43 | 0 |
| 1982 | 30 | 0 |
| 1983 | 26 | 0 |
| 1984 | 26 | 0 |
| 1985 | 29 | 0 |
| 1986 | 18 | 0 |
| 1987 | 19 | 0 |
| 1988 | 13 | 0 |
| 1989 | 15 | 0 |
| 1990 | 27 | 0 |
| 1991 | 23 | 0 |
| 1992 | 31 | 0 |
| 1993 | 30 | 0 |
| 1994 | 37 | 0 |
| 1995 | 23 | 0 |
| 1996 | 29 | 0 |
| 1997 | 30 | 0 |
| 1998 | 41 | 0 |
| 1999 | 26 | 0 |
| 2000 | 24 | 0 |
| 2001 | 27 | 3 |
| 2002 | 31 | 17 |
| 2003 | 21 | 29 |
| 2004 | 26 | 32 |
| 2005 | 14 | 24 |
| 2006 | 16 | 13 |
| 2007 | 7 | 21 |
| 2008 | 9 | 31 |
| 2009 | 9 | 40 |
| 2010 | 20 | 54 |
| 2011 | 34 | 61 |
| 2012 | 42 | 59 |
| 2013 | 47 | 81 |
| 2014 | 56 | 92 |
| 2015 | 64 | 95 |
| 2016 | 68 | 79 |
| 2017 | 72 | 64 |
| 2018 | 65 | 88 |
| 2019 | 66 | 70 |
| 2020 | 64 | 89 |
| 2021 | 57 | 96 |
| 2022 | 57 | 97 |
| 2023 | 77 | 144 |
| 2024 | 82 | 151 |
| 2025 | 77 | 129 |
| 2026 | 79 | 107 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C04B 7/36Manufacture of hydraulic cements in general1,160
- C04B 7/24Cements from oil shales, residues or waste other than slag297
- C04B 7/02Portland cement265
- C04B 7/32Aluminous cements189
- C04B 7/14Cements containing slag169
- C04B 7/12Natural pozzuolanas92
- C04B 7/345Hydraulic cements not provided for in one of the groups c04b7/02 -84
- C04B 7/34Hydraulic lime cements37
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
- Accelerating portland cement and sand mixtures with dry calcium chloride6 Oct 2026US 12,753,117 B1J&P Invesco LLC
- Modifiable hardened pozzolanic material22 Sep 2026US 12,741,909 B2
- Composition for insulating coating8 Sep 2026US 12,729,159 B2Saint-Gobain Isover
- Multi-stage clay calcination method for controlling product color1 Sep 2026US 12,723,001 B2KHD Humboldt Wedag GmbH
- Cementitous compositions for reducing efflorescence8 Oct 2026US 2026/0308051 A1Tremco Cpg Inc.
- Method of processing roadway material to prevent or reduce cracking and/or deterioration8 Oct 2026US 2026/0308052 A1
- Thermal coupling of cement production with gasification8 Oct 2026US 2026/0308053 A1BASF SE
- Method of Forming a Binder Composition and Products Formed Therefrom8 Oct 2026US 2026/0308062 A1A.M.N (Natanya) Engineering and Consulting, LTD
- A mechanochemically carbonated slag, methods of its production and uses thereof1 Oct 2026US 2026/0296960 A1Carbon Upcycling Technologies Inc.
Most cited
By later US patents
- Primary cementing240US 5,125,455 AHalliburton Services · 1992
- Squeeze cementing219US 5,121,795 AHalliburton Company · 1992
- Fine particle size cement compositions and methods210US 5,346,012 AHalliburton Company · 1994
- Repair of microannuli and cement sheath202US 5,127,473 AHalliburton Services · 1992
- Solidification of water based muds198US 5,058,679 AShell Oil Company · 1991