C09K 2208/34
Lubricant additives
C09K2208/34 (Lubricant additives) appears on 254 US grants and 330 published applications in this corpus.
Search patents in C09K- Granted patents
- 254
- Published applications
- 330
- Assignees
- 117
- Inventors
- 551
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 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 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 7 |
| 2010 | 4 | 6 |
| 2011 | 5 | 9 |
| 2012 | 7 | 11 |
| 2013 | 4 | 5 |
| 2014 | 6 | 14 |
| 2015 | 3 | 15 |
| 2016 | 6 | 15 |
| 2017 | 16 | 42 |
| 2018 | 16 | 42 |
| 2019 | 36 | 27 |
| 2020 | 33 | 33 |
| 2021 | 29 | 32 |
| 2022 | 26 | 17 |
| 2023 | 19 | 18 |
| 2024 | 16 | 17 |
| 2025 | 11 | 10 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for improving oil and gas well productivity and encapsulated lubricating frac fluid additive by lubrication of stimulated reservoir volume25 Aug 2026US 12,716,321 B2Saudi Arabian Oil Company
- Drilling fluid compositions comprising a polymerized biorenewable oil30 Jun 2026US 12,668,733 B2Ergon, Inc.
- Nanoparticles and absorbent polymer wellbore cleanout compositions and methods of use thereof23 Jun 2026US 12,662,618 B2Weatherford Technology Holdings, LLC
- Surface-treated, transportable ISO tanks and methods of reducing deposition of a friction reducer on a surface9 Jun 2026US 12,649,806 B2Aculon, Inc.
- Autonomous chemical treatment system and method for drilling and completion rigs30 Dec 2025US 12,509,966 B2Petroleo Brasileiro S.A. - Petrobras
- Wellbore drilling compositions1 Oct 2026US 2026/0297413 A1Chevron Phillips Chemical Company LP
- Nanomaterial-containing friction reducer for water-based drilling fluid, and preparation method therefor13 Aug 2026US 2026/0234460 A1China University of Petroleum (East China)
- Drilling fluids utilizing a salt-tolerant lubricant and methods of use therefor9 Jul 2026US 2026/0193511 A1Saudi Arabian Oil Company
- Nanoparticles and absorbent polymer wellbore cleanout compositions and methods of use thereof14 May 2026US 2026/0132329 A1Weatherford Technology Holdings, LLC
- Drilling fluid compositions comprising a polymerized biorenewable oil7 May 2026US 2026/0125593 A1Ergon, Inc.
Most cited
By later US patents
- Nanofluids and methods of use for drilling and completion fluids104US 8,822,386 B2Baker Hughes Incorporated · 2014
- Drilling fluid and drilling fluid additive64US 5,587,354 AIntegrity Industries, Inc. · 1996
- Thermoset nanocomposite particles, processing for their production, and their use in oil and natural gas drilling applications56US 7,803,740 B2Sun Drilling Products Corporation · 2010
- Drilling fluid additive with low freezing point51US 8,673,825 B2Mudmasters Group, LLC · 2014
- Air drilling misting fluid contains syrups46US 7,964,537 B22011