C09K 8/18
Characterised by the organic compounds
Official title: characterised by the organic compounds
C09K8/18 (Characterised by the organic compounds) appears on 959 US grants and 548 published applications in this corpus.
Search patents in C09K- Granted patents
- 959
- Published applications
- 548
- Assignees
- 304
- Inventors
- 1,417
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 11 | 0 |
| 1978 | 11 | 0 |
| 1979 | 7 | 0 |
| 1980 | 18 | 0 |
| 1981 | 12 | 0 |
| 1982 | 18 | 0 |
| 1983 | 11 | 0 |
| 1984 | 32 | 0 |
| 1985 | 29 | 0 |
| 1986 | 27 | 0 |
| 1987 | 30 | 0 |
| 1988 | 17 | 0 |
| 1989 | 17 | 0 |
| 1990 | 14 | 0 |
| 1991 | 24 | 0 |
| 1992 | 21 | 0 |
| 1993 | 17 | 0 |
| 1994 | 19 | 0 |
| 1995 | 13 | 0 |
| 1996 | 12 | 0 |
| 1997 | 25 | 0 |
| 1998 | 17 | 0 |
| 1999 | 13 | 0 |
| 2000 | 18 | 0 |
| 2001 | 21 | 7 |
| 2002 | 12 | 8 |
| 2003 | 16 | 28 |
| 2004 | 25 | 29 |
| 2005 | 9 | 24 |
| 2006 | 22 | 24 |
| 2007 | 14 | 19 |
| 2008 | 10 | 12 |
| 2009 | 17 | 13 |
| 2010 | 10 | 19 |
| 2011 | 11 | 9 |
| 2012 | 11 | 16 |
| 2013 | 11 | 19 |
| 2014 | 13 | 19 |
| 2015 | 9 | 26 |
| 2016 | 15 | 11 |
| 2017 | 28 | 25 |
| 2018 | 26 | 47 |
| 2019 | 30 | 34 |
| 2020 | 40 | 43 |
| 2021 | 44 | 34 |
| 2022 | 28 | 21 |
| 2023 | 27 | 14 |
| 2024 | 28 | 27 |
| 2025 | 21 | 16 |
| 2026 | 7 | 4 |
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
- Gemini surfactant as foaming agent for foam drilling28 Apr 2026US 12,612,543 B2King Fahd University of Petroleum and Minerals
- Lignin-based drilling fluids and related methods14 Apr 2026US 12,600,894 B2LignoSol IP Limited
- Amphoteric amphiphiles for shale swelling inhibition in oil and gas reservoirs31 Mar 2026US 12,590,238 B1King Fahd University of Petroleum and Minerals
- Lignin-based compositions and related methods10 Sep 2026US 2026/0265600 A1LignoSol IP Limited
- Temperature-resistant thixotropic agent, and preparation method and use thereof23 Jul 2026US 2026/0209592 A1China University of Petroleum (East China)
- Porous material for wellbore thermal insulation in drilling and its preparation method and application11 Jun 2026US 2026/0159745 A1China Univesity of Petroleum (East China)
- Shale swelling inhibition in wellbore5 Feb 2026US 2026/0035605 A1King Fahd University of Petroleum and Minerals
- Methods for freeing differentially stuck pipes25 Dec 2025US 2025/0388800 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Methods of consolidating formations or forming chemical casing or both while drilling188US 6,702,044 B2Halliburton Energy Services.Inc. · 2004
- 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
- Cementing oil and gas wells using converted drilling fluid181US 4,883,125 AAtlantic Richfield Company · 1989
- Microfibrillated cellulose and method for preparing a microfibrillated cellulose174US 5,964,983 AGeneral Sucriere · 1999