C09K 8/536
Characterised by their form or by the form of their components
Official title: characterised by their form or by the form of their components, e.g. encapsulated material
C09K8/536 (Characterised by their form or by the form of their components) appears on 273 US grants and 355 published applications in this corpus.
Search patents in C09K- Granted patents
- 273
- Published applications
- 355
- Assignees
- 121
- Inventors
- 658
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 5 |
| 2003 | 2 | 4 |
| 2004 | 4 | 8 |
| 2005 | 6 | 14 |
| 2006 | 8 | 7 |
| 2007 | 2 | 4 |
| 2008 | 6 | 15 |
| 2009 | 8 | 9 |
| 2010 | 9 | 14 |
| 2011 | 10 | 17 |
| 2012 | 7 | 22 |
| 2013 | 9 | 12 |
| 2014 | 12 | 13 |
| 2015 | 11 | 14 |
| 2016 | 5 | 21 |
| 2017 | 10 | 21 |
| 2018 | 18 | 29 |
| 2019 | 19 | 16 |
| 2020 | 26 | 18 |
| 2021 | 14 | 19 |
| 2022 | 15 | 16 |
| 2023 | 20 | 16 |
| 2024 | 12 | 13 |
| 2025 | 16 | 19 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Contaminant remediation with functionalized (meth)acrylic polymer or copolymer macroparticulates and systems related thereto6 Oct 2026US 12,753,257 B2Countertrace LLC
- Nanoparticles and absorbent polymer wellbore cleanout compositions and methods of use thereof23 Jun 2026US 12,662,618 B2Weatherford Technology Holdings, LLC
- Methods and compositions for squeeze life enhancement26 May 2026US 12,637,609 B2ChampionX LLC
- Methods of making cross-linked pelletized chemicals19 May 2026US 12,630,756 B2Carbo Ceramics Inc.
- Radiation activated well treatment7 Apr 2026US 12,595,407 B2Saudi Arabian Oil Company
- Methods of making cross-linked pelletized chemicals17 Sep 2026US 2026/0275184 A1Carbo Ceramics Inc.
- Methods and compositions for squeeze life enhancement10 Sep 2026US 2026/0265601 A1ChampionX LLC
- Iron control as part of a well treatment using time-released agents30 Jul 2026US 2026/0218036 A1Flex-Chem Holding Company, LLC
- Compositions and methods of removing iron sulfide scales from low pressure gas wells30 Jul 2026US 2026/0218037 A1Saudi Arabian Oil Company
- Materials and methods to enhance mineral scale dissolution rates11 Jun 2026US 2026/0159749 A1Swellfix UK Limited
Most cited
By later US patents
- Encapsulated chemicals for use in controlled time release applications and methods314US 6,527,051 B1Halliburton Energy Services.Inc. · 2003
- Encapsulated chemicals for use in controlled time release applications and methods279US 6,554,071 B1Halliburton Energy Services.Inc. · 2003
- Polymeric particles, their manufacture and uses265US 4,849,484 AAllied Colloids Limited · 1989
- Downhole chemical delivery system for oil and gas wells243US 6,279,656 B1Santrol, Inc. · 2001
- Composition and placement process for oil field chemicals203US 4,986,354 AConoco Inc. · 1991