C04B 7/4438
The fuel being introduced directly into the rotary kiln
Official title: {the fuel being introduced directly into the rotary kiln}
C04B7/4438 (The fuel being introduced directly into the rotary kiln) appears on 43 US grants and 17 published applications in this corpus.
Search patents in C04B- Granted patents
- 43
- Published applications
- 17
- Assignees
- 31
- Inventors
- 75
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 3 |
| 2016 | 0 | 1 |
| 2017 | 4 | 4 |
| 2018 | 1 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for reducing combustion temperature and thermal radiation within a lime kiln9 Dec 2025US 12,492,818 B2
- Organic sludge treatment device and treatment method28 Feb 2023US 11,591,246 B2Taiheia Aement Corporation
- Hydraulic-binder rotary-furnace operation19 Nov 2019US 10,480,858 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Direct-fired inclined counterflow rotary kilns and use thereof7 May 2019US 10,280,114 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for improving the combustion of secondary fuel in a rotary kiln and process for retrofitting a rotary kiln with a burner assembly2 Oct 2018US 10,087,104 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Waste-to-energy production conjoined with portland cement production12 Dec 2024US 2024/0409459 A1
- Use of Limestone Rock Aggregate (LRA) as a Component for the Production of Portland Cement Clinker, Portland Cement, or Related Mineralogy22 Aug 2024US 2024/0279111 A1Tyche Extraction Company, LLC
- A method for reducing combustion temperature and thermal radiation within a lime kiln11 May 2023US 2023/0144517 A1Andritz Inc.
- Organic sludge treatment device and treatment method14 Jan 2021US 2021/0009455 A1Taiheiyo Cement Corporation
- Direct-fired inclined counterflow rotary kilns and use thereof21 Dec 2017US 2017/0362122 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Method for energy recovery from solid hazardous waste53US 4,850,290 AAsh Grove Cement Company · 1989
- Apparatus for charging solid fuel to rotary kilns34US 4,930,965 AAsh Grove Cement Company · 1990
- Manufacture of cement clinker in long rotary kilns by the addition of volatile fuel elements directly into the calcining zone of the rotary kiln31US 5,156,676 AAsh Grove Cement Company · 1992
- Processed wastes as supplemental fuel for modified cement films27US 5,083,516 AAsh Grove Cement Company · 1992
- Waste fuel delivery to long kilns27US 5,224,433 AAsh Grove Cement Company · 1993