C09K 8/905
Biopolymers
Official title: {Biopolymers}
C09K8/905 (Biopolymers) appears on 243 US grants and 91 published applications in this corpus.
Search patents in C09K- Granted patents
- 243
- Published applications
- 91
- Assignees
- 99
- Inventors
- 447
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 14 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 11 | 0 |
| 1982 | 18 | 0 |
| 1983 | 9 | 0 |
| 1984 | 17 | 0 |
| 1985 | 10 | 0 |
| 1986 | 6 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 2 |
| 2004 | 3 | 2 |
| 2005 | 1 | 2 |
| 2006 | 3 | 3 |
| 2007 | 0 | 3 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 8 |
| 2013 | 2 | 2 |
| 2014 | 3 | 1 |
| 2015 | 4 | 12 |
| 2016 | 3 | 10 |
| 2017 | 5 | 7 |
| 2018 | 2 | 6 |
| 2019 | 6 | 8 |
| 2020 | 7 | 2 |
| 2021 | 4 | 6 |
| 2022 | 3 | 4 |
| 2023 | 4 | 1 |
| 2024 | 1 | 5 |
| 2025 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Lignin-based fracturing fluids and related methods15 Apr 2025US 12,275,894 B2LignoSol IP Limited
- Salt tolerant friction reducer11 Mar 2025US 12,247,167 B2Saudi Arabian Oil Company
- Mussel biomimetic heat-resistant and salt-tolerant thickener, preparation method therefor, and gel fracturing fluid, preparation method and use thereof14 Jan 2025US 12,195,670 B1China University of Petroleum (East China)
- Liquid suspension composition for wellbore operations, and methods of making and using same12 Nov 2024US 12,139,668 B2Halliburton Energy Services.Inc.
- Structural stabilizer for fiber and conventional proppant complex in efficient proppant migration and placement technology of fractured well and preparation method19 Dec 2023US 11,845,896 B1Chengdu LEPS Technology Co., Ltd
- Scalable process for on-site biopolymer production for enhanced oil recovery projects5 Dec 2024US 2024/0401098 A1Interenergy Argentina S.A.
- Silica-encapsulated tracers for use in fracturing fluids and methods of preparation and etching thereof21 Nov 2024US 2024/0384162 A1NCS Multistage Inc.
- Guar gum fracturing fluid gel and guar gum fracturing fluid system with reduced ph dependence, as well as preparation method and application thereof7 Nov 2024US 2024/0368459 A1China University of Petroleum (East China)
- Liquid Suspension Composition for Wellbore Operations, and Methods of Making and Using Same10 Oct 2024US 2024/0336831 A1Halliburton Energy Services.Inc.
- Lignin-based fracturing fluids and related methods6 Jun 2024US 2024/0182780 A1LignoSol IP Limited
Most cited
By later US patents
- Foamed well cement slurries, additives and methods177US 6,547,871 B2Halliburton Energy Services.Inc. · 2003
- Foamed well cement slurries, additives and methods174US 6,367,550 B1Halliburton Energy Service, Inc. · 2002
- Hydraulic fracturing technique118US 4,067,389 AMobil Oil Corporation · 1978
- Method of dissolving organic filter cake obtained from polysaccharide based fluids used in production operations and completions of oil and gas wells109US 5,247,995 ABJ Services Company · 1993
- Microbial enhanced oil recovery and compositions therefor99US 4,905,761 AIIT Research Institute · 1990