C09K 8/501
Using spacer compositions
Official title: {using spacer compositions}
C09K8/501 (Using spacer compositions) appears on 47 US grants and 39 published applications in this corpus.
Search patents in C09K- Granted patents
- 47
- Published applications
- 39
- Assignees
- 21
- Inventors
- 100
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 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 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 3 |
| 2017 | 2 | 4 |
| 2018 | 3 | 0 |
| 2019 | 1 | 3 |
| 2020 | 5 | 5 |
| 2021 | 7 | 5 |
| 2022 | 4 | 3 |
| 2023 | 2 | 3 |
| 2024 | 4 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mixture for pre-cementing operation in wellbore13 Jan 2026US 12,522,762 B2Halliburton Energy Services.Inc.
- Compositions useful for diverting or stopping fluids in subterranean operations25 Feb 2025US 12,234,407 B2Finoric, LLC
- Compositions of aphron sealing lost circulation spacer11 Jun 2024US 12,006,467 B2Select Chemistry, LLC
- Geopolymer formulations for mitigating losses7 May 2024US 11,976,238 B2Halliburton Energy Services.Inc.
- Hydraulic geofracture energy storage system with desalination12 Mar 2024US 11,927,085 B2Quidnet Energy Inc.
- Mixture for pre-cementing operation in wellbore11 Apr 2024US 2024/0117236 A1Halliburton Energy Services.Inc.
- Diluent for solids-control fluid in a wellbore22 Jun 2023US 2023/0193114 A1Halliburton Energy Services.Inc.
- Compositions of aphron sealing lost circulation spacer1 Jun 2023US 2023/0167351 A1Rockwater Energy Solutions
- Mixture for pre-cementing operation in wellbore27 Apr 2023US 2023/0131837 A1Halliburton Energy Services.Inc.
- Geopolymer formulations for mitigating losses20 Jan 2022US 2022/0017810 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Process for the reduction of the relative permeability to water in oil-bearing formations64US 6,474,413 B1Petroleo Brasileiro S.A. - Petrobras · 2002
- Thermoplastic cellulosic fiber blends as lost circulation materials63US 9,453,156 B2Board of Supervisors of Louisiana State University and Agricultural and Mechanical College · 2016
- Hydraulic geofracture energy storage system with desalination62US 10,669,471 B2Quidnet Energy Inc. · 2020
- Process for the selective controlled reduction of the relative water permeability in high permeability oil-bearing subterranean formations46US 7,395,858 B2Petroleo Brasiliero S.A. - Petrobras · 2008
- Control of aluminum cross-linked polyacrylamides for sweep improvement31US 4,488,601 AThe Standard Oil Company · 1984