C09K 8/514
Of natural origin
Official title: of natural origin, e.g. polysaccharides, cellulose (C09K8/512 takes precedence)
C09K8/514 (Of natural origin) appears on 392 US grants and 393 published applications in this corpus.
Search patents in C09K- Granted patents
- 392
- Published applications
- 393
- Assignees
- 128
- Inventors
- 705
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 1 |
| 2002 | 5 | 3 |
| 2003 | 6 | 12 |
| 2004 | 5 | 7 |
| 2005 | 5 | 13 |
| 2006 | 10 | 14 |
| 2007 | 6 | 9 |
| 2008 | 5 | 8 |
| 2009 | 7 | 11 |
| 2010 | 11 | 4 |
| 2011 | 5 | 9 |
| 2012 | 6 | 9 |
| 2013 | 5 | 8 |
| 2014 | 6 | 14 |
| 2015 | 6 | 9 |
| 2016 | 10 | 19 |
| 2017 | 8 | 25 |
| 2018 | 20 | 45 |
| 2019 | 43 | 47 |
| 2020 | 45 | 32 |
| 2021 | 38 | 24 |
| 2022 | 21 | 13 |
| 2023 | 14 | 17 |
| 2024 | 26 | 18 |
| 2025 | 21 | 13 |
| 2026 | 6 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods and compositions using dissolvable gelled materials for diversion31 Mar 2026US 12,590,240 B2Schlumberger Technology Corporation
- Foam formulation and its use in temporary pipe plugging3 Mar 2026US 12,565,610 B2Petroleo Brasileiro S.A. - Petrobras
- Wellbore fluids including fluid loss materials comprising a polymer and a bridging material and related methods24 Feb 2026US 12,559,667 B2Schlumberger Technology Corporation
- Biopolymer shale inhibitors and methods of making and using same10 Feb 2026US 12,545,828 B1Halliburton Energy Services.Inc.
- Brine-tolerant compositions comprising fatty acid or fatty ester reaction products of saccharide polymers10 Feb 2026US 12,545,830 B2Integrity Bio-Chemicals, LLC
- Fluid loss control for geopolymer system30 Jul 2026US 2026/0218035 A1Schlumberger Technology Corporation
- Gel beads for conformance control in oil and gas reservoirs4 Jun 2026US 2026/0152684 A1Hamad Bin Khalifa University (HBKU)
- Brine-tolerant compositions comprising fatty acid or fatty ester reaction products of saccharide polymers21 May 2026US 2026/0139184 A1Integrity Bio-Chemicals, LLC
- Cementing spacer30 Apr 2026US 2026/0117111 A1Riteks, Inc.
- Wellbore servicing compositions containing a latex additive12 Mar 2026US 2026/0071111 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Methods of cementing in subterranean zones penetrated by well bores using biodegradable dispersants143US 6,681,856 B1Halliburton Energy Services.Inc. · 2004
- Well treatment fluid and methods with oxidized chitosan-based compound117US 6,764,981 B1Halliburton Energy Services.Inc. · 2004
- Oil based compositions and method for temporarily sealing subterranean zones114US 6,561,273 B2Halliburton Energy Services.Inc. · 2003
- 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
- Well drilling and servicing fluids which deposit an easily removable filter cake102US 5,607,905 ATexas United Chemical Company, LLC. · 1997