C04B 7/434
Preheating with addition of fuel
Official title: {Preheating with addition of fuel, e.g. calcining}
C04B7/434 (Preheating with addition of fuel) appears on 143 US grants and 99 published applications in this corpus.
Search patents in C04B- Granted patents
- 143
- Published applications
- 99
- Assignees
- 97
- Inventors
- 371
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 10 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 2 |
| 2003 | 4 | 1 |
| 2004 | 3 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 2 | 5 |
| 2010 | 1 | 4 |
| 2011 | 1 | 2 |
| 2012 | 4 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 2 | 7 |
| 2016 | 3 | 4 |
| 2017 | 6 | 3 |
| 2018 | 2 | 0 |
| 2019 | 2 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 3 |
| 2022 | 2 | 6 |
| 2023 | 4 | 8 |
| 2024 | 1 | 16 |
| 2025 | 3 | 13 |
| 2026 | 6 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and device for the production of cement clinker2 Jun 2026US 12,643,816 B2Dyckerhoff AG
- Use of a hydraulic binder containing calcium aluminate for the production of a construction material12 May 2026US 12,623,963 B2ARDEX Group GmbH
- Method of calcining a clay material7 Apr 2026US 12,595,206 B2Amrize Technology Switzerland LLC
- Installation for the thermal treatment of dispersible raw material, and method for operating such an installation24 Feb 2026US 12,560,381 B2Dyckerhoff AG
- System and method for thermally treatment of air-dispersible raw material3 Feb 2026US 12,540,098 B2thyssenkrupp AG
- Strengthened calcium carbonate cementitious composition17 Sep 2026US 2026/0274746 A1Arelac, Inc.
- Method for manufacturing composite cement10 Sep 2026US 2026/0265125 A1HSustainability GmbH
- Method for manufacturing cement clinker10 Sep 2026US 2026/0265128 A1HSustainability GmbH
- Cement compositions and methods of making the same from waste27 Aug 2026US 2026/0250190 A1The Board of Trustees of The University of Alabama
- Optimized conduction of heat in a plant for the thermal treatment of mineral substances6 Aug 2026US 2026/0227129 A1thyssenkrupp AG
Most cited
By later US patents
- Apparatus for calcining cement98US 3,975,148 AOnoda Cement Co., Ltd. · 1976
- Oxygen enrichment of cement kiln system combustion37US 6,488,765 B1Cemex, Inc. · 2002
- Apparatus for oxygen enrichment of cement kiln system35US 6,688,883 B2Cemex, Inc. · 2004
- Method of calcining sinterable materials to form cement clinker or the like26US 4,248,639 ABabcock Krauss-Maffei Industrieanlagen GmbH · 1981
- Process of making cement clinker and apparatus for performing said process23US 4,913,742 AVoest-Alpine Aktiengesellschaft · 1990