C04B 7/36
Manufacture of hydraulic cements in general
C04B7/36 (Manufacture of hydraulic cements in general) appears on 1,160 US grants and 969 published applications in this corpus.
Search patents in C04B- Granted patents
- 1,160
- Published applications
- 969
- Assignees
- 551
- Inventors
- 2,442
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 32 | 0 |
| 1978 | 32 | 0 |
| 1979 | 16 | 0 |
| 1980 | 32 | 0 |
| 1981 | 30 | 0 |
| 1982 | 22 | 0 |
| 1983 | 22 | 0 |
| 1984 | 20 | 0 |
| 1985 | 22 | 0 |
| 1986 | 15 | 0 |
| 1987 | 16 | 0 |
| 1988 | 9 | 0 |
| 1989 | 11 | 0 |
| 1990 | 15 | 0 |
| 1991 | 10 | 0 |
| 1992 | 25 | 0 |
| 1993 | 21 | 0 |
| 1994 | 22 | 0 |
| 1995 | 17 | 0 |
| 1996 | 14 | 0 |
| 1997 | 22 | 0 |
| 1998 | 27 | 0 |
| 1999 | 17 | 0 |
| 2000 | 14 | 0 |
| 2001 | 18 | 2 |
| 2002 | 20 | 11 |
| 2003 | 12 | 17 |
| 2004 | 16 | 18 |
| 2005 | 10 | 15 |
| 2006 | 9 | 9 |
| 2007 | 5 | 13 |
| 2008 | 5 | 20 |
| 2009 | 5 | 26 |
| 2010 | 14 | 49 |
| 2011 | 29 | 45 |
| 2012 | 32 | 34 |
| 2013 | 26 | 38 |
| 2014 | 33 | 59 |
| 2015 | 33 | 40 |
| 2016 | 34 | 38 |
| 2017 | 38 | 37 |
| 2018 | 39 | 50 |
| 2019 | 31 | 34 |
| 2020 | 29 | 44 |
| 2021 | 39 | 61 |
| 2022 | 32 | 49 |
| 2023 | 44 | 69 |
| 2024 | 37 | 77 |
| 2025 | 36 | 69 |
| 2026 | 34 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C04B 7/43Heat treatment667
- C04B 7/48Clinker treatment263
- C04B 7/364Avoiding environmental pollution during cement-manufacturing195
- C04B 7/38Preparing or treating the raw materials individually or as batches127
- C04B 7/60Methods for eliminating alkali metals or compounds thereof63
- C04B 7/361Condition or time responsive control in hydraulic cement manufacturing processes30
- C04B 7/368Obtaining spherical cement particles4
Recent patents
- Multi-stage clay calcination method for controlling product color1 Sep 2026US 12,723,001 B2KHD Humboldt Wedag GmbH
- Method and device for producing cement clinker1 Sep 2026US 12,723,002 B2thyssenkrupp AG
- Production of activated-belite-CSA clinkers at extremely low firing temperature18 Aug 2026US 12,709,571 B2University of Kentucky Research Foundation
- Binder composition comprising fine filler and fine ground granulated blast furnace slag11 Aug 2026US 12,703,662 B2Ecocem Materials Limited
- Cement kiln burner and method for operating same11 Aug 2026US 12,704,252 B2Taiheiyo Cement Corporation
- Thermal coupling of cement production with gasification8 Oct 2026US 2026/0308053 A1BASF SE
- Cementitious reagents, methods of manufacturing and uses thereof1 Oct 2026US 2026/0296966 A1Terra Co2 Technology Holdings, Inc.
- Electrolysis of molten metal oxides and subsequent uses24 Sep 2026US 2026/0286541 A1
- Improved plasma products and methods for producing same by using multiple simultaneous electrical discharges24 Sep 2026US 2026/0290760 A1Plazer IP, LLC
- Strengthened calcium carbonate cementitious composition17 Sep 2026US 2026/0274746 A1Arelac, 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
- Starch-based compositions having uniformly dispersed fibers used to manufacture high strength articles having a fiber-reinforced, starch-bound cellular matrix165US 5,679,145 AE. Khashoggi Industries · 1997