D21C 7/10
Heating devices
D21C7/10 (Heating devices) appears on 35 US grants and 28 published applications in this corpus.
Search patents in D21C- Granted patents
- 35
- Published applications
- 28
- Assignees
- 21
- Inventors
- 72
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 4 | 2 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 3 |
| 2018 | 0 | 1 |
| 2019 | 4 | 2 |
| 2020 | 1 | 1 |
| 2021 | 2 | 3 |
| 2022 | 3 | 1 |
| 2023 | 0 | 1 |
| 2024 | 3 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optimization of chemical consumption in biomass delignification4 Aug 2026US 12,698,589 B2Sixring Inc.
- Optimization of chemical consumption in biomass delignification17 Feb 2026US 12,553,180 B2Sixring Inc.
- System for treatment of a biomass material24 Sep 2024US 12,098,505 B2Valmet Corporation
- Dual surfactant digester additive composition and a method for enhancing the pulping of wood chips using the same30 Apr 2024US 11,970,816 B2ChemStone, Inc.
- Process for producing refined cotton with high polymerization degree19 Mar 2024US 11,932,989 B2Hubei Jinhanjiang Refined Cotton Co., Ltd.
- Optimization of chemical consumption in biomass delignification13 Feb 2025US 2025/0052002 A1Sixring Inc.
- Optimization Of Chemical Consumption in Biomass Delignification15 Feb 2024US 2024/0052566 A1Sixring Inc.
- Process for producing refined cotton with high polymerization degree16 Feb 2023US 2023/0046123 A1Hubei Jinhanjiang Refined Cotton Co., Ltd.
- Method for cooling and detoxifying biomass19 May 2022US 2022/0154233 A1Valmet Corporation
- Dual Surfactant Digester Additive Composition and a Method for Enhancing the Pulping of Wood Chips Using the Same2 Dec 2021US 2021/0372048 A1ChemStone, Inc.
Most cited
By later US patents
- Falling film liquor heater having a screen to prevent clogging of a liquid distributing tray16US 4,764,254 ARosenblad Corporation · 1988
- Continuous digester with a low temperature gas-phase16US 5,882,477 AAhlstrom Machinery Inc. · 1999
- Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors15US 6,176,971 B1Andritz-Ahlstrom Inc. · 2001
- Apparatus for chemical treatment of lignocellulosic materials9US 5,114,540 A1992
- Low temperature gas phase continuous digester8US 6,024,837 AAhlstrom Machinery Inc. · 2000