C09K 8/10
Cellulose or derivatives thereof
C09K8/10 (Cellulose or derivatives thereof) appears on 142 US grants and 112 published applications in this corpus.
Search patents in C09K- Granted patents
- 142
- Published applications
- 112
- Assignees
- 67
- Inventors
- 259
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 4 |
| 2003 | 4 | 4 |
| 2004 | 3 | 2 |
| 2005 | 0 | 4 |
| 2006 | 1 | 6 |
| 2007 | 2 | 3 |
| 2008 | 1 | 3 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 3 | 2 |
| 2012 | 1 | 2 |
| 2013 | 3 | 4 |
| 2014 | 1 | 5 |
| 2015 | 2 | 5 |
| 2016 | 1 | 5 |
| 2017 | 4 | 15 |
| 2018 | 7 | 9 |
| 2019 | 5 | 9 |
| 2020 | 13 | 10 |
| 2021 | 11 | 5 |
| 2022 | 1 | 2 |
| 2023 | 6 | 3 |
| 2024 | 3 | 1 |
| 2025 | 3 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for removing a filter cake from a borehole11 Nov 2025US 12,466,988 B2
- Multifunctional waste additives for subterranean formation treatment fluids, and methods and systems related thereto29 Jul 2025US 12,371,602 B2Saudi Arabian Oil Company
- Rheology modifiers for high fluid-loss squeeze lost circulation materials7 Jan 2025US 12,187,958 B2Halliburton Energy Services.Inc.
- Drilling fluid additives and fracturing fluid additives containing cellulose nanofibers and/or nanocrystals5 Nov 2024US 12,134,729 B2GranBio Intellectual Property Holdings, LLC
- Well conditioning method for wireline logging using dedicated aqueous based drilling fluid composition29 Oct 2024US 12,129,423 B2Petroleo Brasileiro S.A. - Petrobras
- Pla dispersion as filtration control agent in drilling fluids11 Dec 2025US 2025/0376612 A1LyondellBasell Advanced Polymers Inc.
- Method for using drilling fluid in drilling operations, drilling fluid and its use22 May 2025US 2025/0163766 A1Petroleo Brasileiro S.A. - Petrobras
- Multifunctional waste additives for subterranean formation treatment fluids, and methods and systems related thereto17 Apr 2025US 2025/0122415 A1Saudi Arabian Oil Company
- Gel particles with tags for labeling drill cuttings30 Jan 2025US 2025/0035552 A1Saudi Arabian Oil Company
- Method for removing a filter cake from a borehole14 Nov 2024US 2024/0376370 A1
Most cited
By later US patents
- Well treatment process210US 4,957,165 AConoco Inc. · 1990
- Well drilling and servicing fluids and methods of removing filter cake deposited thereby200US 6,494,263 B2Halliburton Energy Services.Inc. · 2002
- Well drilling and servicing fluids and methods of removing filter cake deposited thereby185US 6,422,314 B1Halliburton Energy Services.Inc. · 2002
- Stabilized fluids containing soluble zinc94US 5,728,654 ATexas United Chemical Company, LLC. · 1998
- Well drilling and servicing fluids and methods of removing filter cake deposited thereby77US 6,737,385 B2Halliburton Energy Services.Inc. · 2004