C04B 7/432
Preheating without addition of fuel
Official title: {Preheating without addition of fuel}
C04B7/432 (Preheating without addition of fuel) appears on 60 US grants and 52 published applications in this corpus.
Search patents in C04B- Granted patents
- 60
- Published applications
- 52
- Assignees
- 48
- Inventors
- 164
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 4 | 3 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 4 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 13 |
| 2024 | 1 | 8 |
| 2025 | 2 | 7 |
| 2026 | 8 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-stage clay calcination method for controlling product color1 Sep 2026US 12,723,001 B2KHD Humboldt Wedag GmbH
- Method and apparatus for manufacturing cement using rotary generated thermal energy28 Jul 2026US 12,692,192 B2Coolbrook Oy
- Calcination unit for decarbonating raw materials7 Jul 2026US 12,674,621 B2Fives Fcb
- Method and apparatus for heating fluids in processes related to refining and petrochemical industries using rotary generated thermal energy9 Jun 2026US 12,649,689 B2Coolbrook Oy
- Energy-efficient, carbon-enriched cement production system and a method of producing cement clinker5 May 2026US 12,617,718 B2Tianjin Cement Industry Design & Research Institute Co., Ltd.
- Refining and/or petrochemical facility and apparatus for heating fluids in processes related to refining and petrochemical industries using rotary generated thermal energy17 Sep 2026US 2026/0274747 A1Coolbrook Oy
- Calcination apparatus and processes9 Jul 2026US 2026/0192270 A1The University of Adelaide
- Avoiding of emissions in the production of artificial pozzolans made of mineral material, in particular clays9 Apr 2026US 2026/0097990 A1thyssenkrupp AG
- Method and apparatus for incineration of combustible waste during the manufacture of cement clinker26 Feb 2026US 2026/0055025 A1FLSmidth Cement A/S
- Method of calcining a raw material to obtain a cementitious material15 Jan 2026US 2026/0015286 A1
Most cited
By later US patents
- Fixed bed filtering preheater process for high temperature process furnaces45US 5,713,977 APraxair Technology, Inc. · 1998
- Cyclone construction26US 4,662,909 AKrupp Polysius AG · 1987
- Device for mixing gaseous fluids by turbulence20US 4,337,032 ALafarge Coppee · 1982
- Method and apparatus for the thermal treatment of meal-like raw materials20US 4,747,879 AKlockner-Humboldt-Deutz Aktiengesellschaft · 1988
- Method and apparatus for burning raw materials13US 4,363,668 AKlockner-Humboldt-Deutz Aktiengesellschaft · 1982