C09K 2208/04
Hulls, shells or bark containing well drilling or treatment fluids
C09K2208/04 (Hulls, shells or bark containing well drilling or treatment fluids) appears on 118 US grants and 128 published applications in this corpus.
Search patents in C09K- Granted patents
- 118
- Published applications
- 128
- Assignees
- 37
- Inventors
- 231
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 2 | 1 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 4 |
| 2015 | 1 | 7 |
| 2016 | 2 | 10 |
| 2017 | 4 | 13 |
| 2018 | 11 | 20 |
| 2019 | 19 | 18 |
| 2020 | 15 | 16 |
| 2021 | 27 | 14 |
| 2022 | 10 | 4 |
| 2023 | 6 | 5 |
| 2024 | 5 | 5 |
| 2025 | 5 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ultra-lightweight proppants5 May 2026US 12,618,001 B2Saudi Arabian Oil Company
- Bio-composite seal for water shut off application in a fractured substrate28 Apr 2026US 12,612,545 B1Saudi Arabian Oil Company
- Method and composition for treating lost circulation14 Oct 2025US 12,441,928 B1Halliburton Energy Services.Inc.
- Composition for making a drilling fluid a non-invasive drilling fluid10 Jun 2025US 12,325,823 B2European Mud Company AS
- Inner spacer for semiconductor device22 Apr 2025US 12,283,618 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Cementing spacer30 Apr 2026US 2026/0117111 A1Riteks, Inc.
- Inner spacer for semiconductor device24 Jul 2025US 2025/0236782 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Ultra-lightweight proppants19 Jun 2025US 2025/0197715 A1Saudi Arabian Oil Company
- Biodegradable surfactant fluid loss control additive5 Jun 2025US 2025/0179343 A1Halliburton Energy Services.Inc.
- Low surface tension surfactant system for enhancing flow-back performance5 Sep 2024US 2024/0294823 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Lost circulation additive, lost circulation treatment fluid made therefrom, and method of minimizing lost circulation in a subterranean formation93US 6,016,879 A2000
- Well servicing agents and processes82US 4,579,668 AThe Western Company of North America · 1986
- Water-based drilling fluid composition having a multifunctional mud additive for reducing fluid loss during drilling68US 9,006,151 B2Saudi Arabian Oil Company · 2015
- Lost circulation composition for fracture sealing52US 8,739,872 B1Halliburton Energy Services.Inc. · 2014
- Clean fluid loss control additives48US 9,416,306 B2Halliburton Energy Services.Inc. · 2016