C09K 8/20
Natural organic compounds or derivatives thereof
Official title: Natural organic compounds or derivatives thereof, e.g. polysaccharides or lignin derivatives
C09K8/20 (Natural organic compounds or derivatives thereof) appears on 363 US grants and 215 published applications in this corpus.
Search patents in C09K- Granted patents
- 363
- Published applications
- 215
- Assignees
- 143
- Inventors
- 545
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 10 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 19 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 8 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 9 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 6 |
| 2002 | 6 | 5 |
| 2003 | 8 | 9 |
| 2004 | 5 | 8 |
| 2005 | 2 | 9 |
| 2006 | 5 | 14 |
| 2007 | 6 | 9 |
| 2008 | 3 | 4 |
| 2009 | 9 | 3 |
| 2010 | 2 | 4 |
| 2011 | 5 | 3 |
| 2012 | 1 | 0 |
| 2013 | 2 | 8 |
| 2014 | 2 | 4 |
| 2015 | 3 | 7 |
| 2016 | 5 | 5 |
| 2017 | 8 | 9 |
| 2018 | 6 | 30 |
| 2019 | 21 | 25 |
| 2020 | 24 | 15 |
| 2021 | 22 | 11 |
| 2022 | 9 | 6 |
| 2023 | 6 | 4 |
| 2024 | 12 | 11 |
| 2025 | 9 | 5 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Lignin-based compositions and related methods26 May 2026US 12,637,605 B2LignoSol IP Limited
- Methods for freeing differentially stuck pipes12 May 2026US 12,624,271 B2Saudi Arabian Oil Company
- Lignin-based drilling fluids and related methods14 Apr 2026US 12,600,894 B2LignoSol IP Limited
- Clay swelling inhibition using acrylic acid functionalized cellulose diacrylate carbon nanocomposite30 Dec 2025US 12,509,619 B2King Fahd University of Petroleum and Minerals
- Silicate water-based drilling fluid for coalbed methane wells and application thereof16 Sep 2025US 12,415,945 B1Yangtze University
- Lignin-based compositions and related methods10 Sep 2026US 2026/0265600 A1LignoSol IP Limited
- Methods for freeing differentially stuck pipes25 Dec 2025US 2025/0388800 A1Saudi Arabian Oil Company
- Drilling with water-based mud including multiple clays23 Oct 2025US 2025/0326963 A1Saudi Arabian Oil Company
- Plant-based drilling fluid composition7 Aug 2025US 2025/0250475 A1King Fahd University of Petroleum and Minerals
- Water-based drilling mud formulation using wastewater discharge24 Jul 2025US 2025/0236777 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Methods of treating subterranean formation using borate cross-linking compositions187US 6,024,170 AHalliburton Energy Services.Inc. · 2000
- Set delayed cement compositions and methods of using the same186US 4,676,832 AHalliburton Company · 1987
- Microfibrillated cellulose and method for preparing a microfibrillated cellulose174US 5,964,983 AGeneral Sucriere · 1999
- Hec-bentonite compatible blends144US 4,561,985 AUnion Carbide Corporation · 1985
- Oil well spacer fluids114US 4,141,843 AHalliburton Company · 1979