C04B 7/44
Burning
Official title: Burning; Melting
C04B7/44 (Burning) appears on 315 US grants and 310 published applications in this corpus.
Search patents in C04B- Granted patents
- 315
- Published applications
- 310
- Assignees
- 206
- Inventors
- 836
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 1 |
| 2003 | 2 | 5 |
| 2004 | 3 | 3 |
| 2005 | 1 | 6 |
| 2006 | 2 | 1 |
| 2007 | 1 | 4 |
| 2008 | 2 | 5 |
| 2009 | 2 | 5 |
| 2010 | 2 | 10 |
| 2011 | 3 | 7 |
| 2012 | 7 | 7 |
| 2013 | 7 | 8 |
| 2014 | 10 | 12 |
| 2015 | 4 | 15 |
| 2016 | 10 | 11 |
| 2017 | 11 | 11 |
| 2018 | 9 | 7 |
| 2019 | 11 | 14 |
| 2020 | 4 | 13 |
| 2021 | 16 | 33 |
| 2022 | 14 | 25 |
| 2023 | 20 | 21 |
| 2024 | 9 | 31 |
| 2025 | 14 | 32 |
| 2026 | 14 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C04B 7/4407Treatment or selection of the fuel therefor157
- C04B 7/4453Using plasmas or radiations34
- C04B 7/45In fluidised beds27
- C04B 7/4476Selection of the kiln atmosphere11
- C04B 7/46Electric10
- C04B 7/4469In shaft or vertical kilns8
- C04B 7/4461Grate sintering4
- C04B 7/4484Non-electric melting4
All 9 subgroupsShow fewer
Recent patents
- Multi-stage clay calcination method for controlling product color1 Sep 2026US 12,723,001 B2KHD Humboldt Wedag GmbH
- Cement kiln burner and method for operating same11 Aug 2026US 12,704,252 B2Taiheiyo Cement Corporation
- Calcination unit for decarbonating raw materials7 Jul 2026US 12,674,621 B2Fives Fcb
- Device and method for the thermal treatment of a mineral feedstock30 Jun 2026US 12,668,537 B2thyssenkrupp AG
- Concentrated solar cement kiln16 Jun 2026US 12,656,021 B2
- 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.
- Improved plasma products and methods for producing same by using multiple simultaneous electrical discharges24 Sep 2026US 2026/0290760 A1Plazer IP, LLC
- Method for manufacturing cement clinker10 Sep 2026US 2026/0265128 A1HSustainability GmbH
- Cement firing facility and firing method20 Aug 2026US 2026/0242279 A1Sumitomo Osaka Cement Co., Ltd.
Most cited
By later US patents
- Plasma whirl reactor apparatus and methods of use164US 7,622,693 B2Foret Plasma Labs, LLC · 2009
- Method for energy recovery from solid hazardous waste53US 4,850,290 AAsh Grove Cement Company · 1989
- Method and apparatus for the removal of harmful and waste materials by combustion47US 4,640,681 AKlockner-Humboldt-Deutz Aktiengesellschaft · 1987
- Control of cement clinker production by analysis of sulfur in the end product47US 5,882,190 A1999
- Oxygen lancing for production of cement clinker46US 5,572,938 APraxair Technology, Inc. · 1996