C09K 8/032
Inorganic additives
Official title: {Inorganic additives}
C09K8/032 (Inorganic additives) appears on 406 US grants and 473 published applications in this corpus.
Search patents in C09K- Granted patents
- 406
- Published applications
- 473
- Assignees
- 129
- Inventors
- 719
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 3 | 1 |
| 2004 | 0 | 5 |
| 2005 | 1 | 7 |
| 2006 | 3 | 10 |
| 2007 | 8 | 7 |
| 2008 | 6 | 6 |
| 2009 | 4 | 14 |
| 2010 | 8 | 6 |
| 2011 | 5 | 9 |
| 2012 | 9 | 20 |
| 2013 | 5 | 16 |
| 2014 | 10 | 31 |
| 2015 | 12 | 21 |
| 2016 | 11 | 21 |
| 2017 | 18 | 38 |
| 2018 | 23 | 45 |
| 2019 | 37 | 47 |
| 2020 | 41 | 33 |
| 2021 | 41 | 37 |
| 2022 | 42 | 20 |
| 2023 | 29 | 28 |
| 2024 | 22 | 23 |
| 2025 | 24 | 19 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Downhole methods and compositions used in such2 Jun 2026US 12,644,040 B2Dorf Ketal Chemicals Fze
- Downhole methods and compositions used in such2 Jun 2026US 12,644,041 B2Dorf Ketal Chemicals Fze
- Downhole methods and compositions used in such19 May 2026US 12,630,758 B2Dorf Ketal Chemicals Fze
- Downhole methods and compositions used in such12 May 2026US 12,624,278 B2Dorf Ketal Chemicals Fze
- Sulfonation method for efficient scaleup synthesis of Janus carbon nanofluids from waste plastics21 Apr 2026US 12,606,733 B2Saudi Arabian Oil Company
- Viscosity reducer and preparation method therefor and use thereof, and method for improving crude-oil pollution resistance of drilling fluid20 Aug 2026US 2026/0242655 A1China Petroleum & Chemical Corporation
- Lost-circulation material made from inorganic, recycled roofing materials7 May 2026US 2026/0125592 A1Halliburton Energy Services.Inc.
- Sodium alkyl pg-dimonium chloride phosphates as lubricating agents in aqueous based drilling fluids30 Apr 2026US 2026/0117110 A1Colonial Chemical Inc.
- Emulsified acid system for drag reduction in subterranean wells19 Feb 2026US 2026/0049242 A1King Fahd University of Petroleum and Minerals
- Hydrogen sulfide scavaging method using layered triple hydroxide8 Jan 2026US 2026/0008950 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Lost circulation drilling fluid166US 4,498,995 A1985
- Prevention of lost circulation of drilling muds149US 4,460,052 A1984
- Well treatment composition and methods utilizing nano-particles149US 7,559,369 B2Halliubrton Energy Services, Inc. · 2009
- Nanofluids and methods of use for drilling and completion fluids104US 8,822,386 B2Baker Hughes Incorporated · 2014
- Well treatment compositions and methods utilizing nano-particles84US 7,806,183 B2Halliburton Energy Services.Inc. · 2010