C09K 8/88
Macromolecular compounds
Official title: macromolecular compounds
C09K8/88 (Macromolecular compounds) appears on 1,634 US grants and 1,513 published applications in this corpus.
Search patents in C09K- Granted patents
- 1,634
- Published applications
- 1,513
- Assignees
- 425
- Inventors
- 2,471
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 11 | 0 |
| 1978 | 21 | 0 |
| 1979 | 14 | 0 |
| 1980 | 22 | 0 |
| 1981 | 22 | 0 |
| 1982 | 34 | 0 |
| 1983 | 11 | 0 |
| 1984 | 26 | 0 |
| 1985 | 23 | 0 |
| 1986 | 25 | 0 |
| 1987 | 32 | 0 |
| 1988 | 29 | 0 |
| 1989 | 37 | 0 |
| 1990 | 27 | 0 |
| 1991 | 33 | 0 |
| 1992 | 32 | 0 |
| 1993 | 24 | 0 |
| 1994 | 25 | 0 |
| 1995 | 10 | 0 |
| 1996 | 12 | 0 |
| 1997 | 9 | 0 |
| 1998 | 19 | 0 |
| 1999 | 10 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 2 |
| 2002 | 8 | 5 |
| 2003 | 6 | 13 |
| 2004 | 13 | 18 |
| 2005 | 2 | 22 |
| 2006 | 19 | 37 |
| 2007 | 17 | 28 |
| 2008 | 11 | 41 |
| 2009 | 24 | 30 |
| 2010 | 24 | 66 |
| 2011 | 30 | 47 |
| 2012 | 26 | 63 |
| 2013 | 31 | 48 |
| 2014 | 47 | 87 |
| 2015 | 46 | 88 |
| 2016 | 53 | 141 |
| 2017 | 78 | 122 |
| 2018 | 86 | 109 |
| 2019 | 92 | 114 |
| 2020 | 101 | 104 |
| 2021 | 95 | 99 |
| 2022 | 92 | 72 |
| 2023 | 85 | 42 |
| 2024 | 48 | 57 |
| 2025 | 44 | 38 |
| 2026 | 18 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aqueous based, water-soluble polymer slurry system21 Jul 2026US 12,686,811 B2Terra-Ace Intermediate Holdings, LLC
- Subterranean formations14 Jul 2026US 12,680,015 B2Independence Oilfield Chemicals LLC
- Surface-treated, transportable ISO tanks and methods of reducing deposition of a friction reducer on a surface9 Jun 2026US 12,649,806 B2Aculon, Inc.
- Tracer compositions2 Jun 2026US 12,644,376 B2Saudi Arabian Oil Company
- Low concentration synthetic polymer fracturing fluid with ascorbic acid26 May 2026US 12,637,610 B2Beijing Huamei, Inc.
- Subterranean formations24 Sep 2026US 2026/0286215 A1Independence Oilfield Chemicals LLC
- Method for modifying the permeability of a subterranean formation and related treatment fluid used in said method20 Aug 2026US 2026/0242657 A1ENI S. p. A.
- Method for modifying the permeability of a geological formation zone20 Aug 2026US 2026/0243145 A1
- Water-lock releasing chemical agent for oil and gas reservoirs, preparation method therefor and use thereof6 Aug 2026US 2026/0226342 A1China Petroleum & Chemical Corporation
- Demulsifier compositions comprising copolymers, methods of producing and using the same23 Jul 2026US 2026/0209421 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Control of particulate flowback in subterranean wells341US 5,833,000 AHalliburton Energy Services.Inc. · 1998
- Control of fine particulate flowback in subterranean wells335US 5,853,048 AHalliburton Energy Services, Inc. · 1998
- Control of particulate flowback in subterranean wells303US 6,047,772 AHalliburton Energy Services.Inc. · 2000
- Control of fine particulate flowback in subterranean wells260US 5,775,425 AHalliburton Energy Services, Inc. · 1998
- Method of controlling particulate flowback in subterranean wells and introducing treatment chemicals256US 6,209,643 B1Halliburton Energy Services.Inc. · 2001