D21C 11/10
Concentrating spent liquor by evaporation
Official title: Concentrating spent liquor by evaporation (evaporators B01D)
D21C11/10 (Concentrating spent liquor by evaporation) appears on 138 US grants and 82 published applications in this corpus.
Search patents in D21C- Granted patents
- 138
- Published applications
- 82
- Assignees
- 89
- Inventors
- 302
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 2 |
| 2005 | 3 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 3 | 2 |
| 2012 | 2 | 3 |
| 2013 | 2 | 2 |
| 2014 | 3 | 4 |
| 2015 | 5 | 6 |
| 2016 | 1 | 0 |
| 2017 | 3 | 5 |
| 2018 | 1 | 2 |
| 2019 | 3 | 4 |
| 2020 | 2 | 5 |
| 2021 | 4 | 8 |
| 2022 | 4 | 13 |
| 2023 | 5 | 5 |
| 2024 | 5 | 4 |
| 2025 | 9 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recovery boiler startup burner assembly31 Mar 2026US 12,590,412 B2Andritz Inc.
- Method to treat a condensate in a pulping process13 Jan 2026US 12,522,979 B2Nikede Comercio E RepresentaçõEs Ltda.
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials25 Nov 2025US 12,480,255 B2Pierson Capital Environmental (Beijing) Limited
- Method for preparing biomechanical unbleached pulp from wheat straw and full utilization of by-products thereof28 Oct 2025US 12,454,792 B2Qilu University of Technology
- Method for preparing unbleached biomechanical pulp by hot steam in coordination with biological enzyme treatment of wheat straw and full utilization of by-products thereof30 Sep 2025US 12,428,784 B2Qilu University of Technology
- Compositions and methods for the removal of scale build-up in pulp and paper process30 Apr 2026US 2026/0117460 A1Solenis Technologies, L.P.
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials6 Nov 2025US 2025/0341054 A1Pierson Capital Environmental (Beijing) Limited
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials3 Jul 2025US 2025/0215642 A1Pierson Capital Environmental (Beijing) Limited
- Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials8 May 2025US 2025/0146217 A1Pierson Capital Environmental (Beijing) Limited
- Catalyst free organosolv process, system, and method for fractionation of lignocellulosic materials and bioproducts recovery6 Mar 2025US 2025/0075427 A1American Science and Technology Corporation
Most cited
By later US patents
- Method and apparatus for removing volatile fluids39US 4,079,585 A1978
- Method of monitoring and inhibiting scale deposition in pulp mill evaporators and concentrators37US 7,985,318 B2Nalco Company · 2011
- Process for increasing the effectiveness of slag and/or corrosion control chemicals for combustion units34US 5,894,806 AFuel Tech, Inc. · 1999
- Method for removing odor from fluid33US 4,225,381 AOji Paper Co., Ltd. · 1980
- Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor23US 6,955,743 B2Chempolis Oy · 2005