C04B 24/18
Lignin sulfonic acid or derivatives thereof
Official title: Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
C04B24/18 (Lignin sulfonic acid or derivatives thereof) appears on 70 US grants and 60 published applications in this corpus.
Search patents in C04B- Granted patents
- 70
- Published applications
- 60
- Assignees
- 55
- Inventors
- 220
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 2 | 4 |
| 2013 | 1 | 3 |
| 2014 | 0 | 0 |
| 2015 | 4 | 6 |
| 2016 | 2 | 2 |
| 2017 | 4 | 4 |
| 2018 | 2 | 3 |
| 2019 | 2 | 6 |
| 2020 | 2 | 4 |
| 2021 | 5 | 3 |
| 2022 | 2 | 2 |
| 2023 | 2 | 1 |
| 2024 | 3 | 3 |
| 2025 | 2 | 5 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process of making sulfonated lignin-based compositions, sulfonated lignin-based compositions so-obtained and their use29 Sep 2026US 12,747,259 B2Rg Dispersants Ltd.
- Deflocculation additives for wellbore servicing fluid additives15 Sep 2026US 12,735,620 B2Halliburton Energy Services.Inc.
- Compositions and methods for branched calcium lignosulfonate cement dispersants18 Aug 2026US 12,709,706 B2Saudi Arabian Oil Company
- Compositions and methods for branched calcium lignosulfonate cement dispersants6 May 2025US 12,291,670 B2Saudi Arabian Oil Company
- Composition for enhancing the thickening time of hematite-based fly ash geopolymers8 Apr 2025US 12,269,775 B1King Fahd University of Petroleum and Minerals
- Concrete admixtures11 Jun 2026US 2026/0159448 A1Carboncure Technologies Inc.
- Oxidized lignin polycarboxylate salt, preparation method, and use as a water reducer11 Jun 2026US 2026/0159624 A1Jiahua Science & Technology Development (Shanghai) Ltd.
- Compositions and methods for branched calcium lignosulfonate cement dispersants11 Jun 2026US 2026/0159747 A1Saudi Arabian Oil Company
- Concrete Admixtures21 May 2026US 2026/0138921 A1
- Deflocculation additives for wellbore servicing fluid additives21 May 2026US 2026/0139180 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations203US 4,676,317 AHalliburton Company · 1987
- Method of reducing fluid loss in cement compositions which may contain substantial salt concentrations119US 4,703,801 AHalliburton Company · 1987
- Methods and compositions for cementing pipe strings in well bores103US 6,244,344 B1Halliburton Energy Services.Inc. · 2001
- Methods and compositions for cementing pipe strings in well bores81US 6,350,309 B2Halliburton Energy Services.Inc. · 2002
- Methods of cementing subterranean zones79US 6,227,294 B1Halliburton Energy Services.Inc. · 2001