C07C 2531/08
Ion-exchange resins
C07C2531/08 (Ion-exchange resins) appears on 214 US grants and 131 published applications in this corpus.
Search patents in C07C- Granted patents
- 214
- Published applications
- 131
- Assignees
- 95
- Inventors
- 432
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 9 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 12 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 4 |
| 2003 | 11 | 8 |
| 2004 | 7 | 9 |
| 2005 | 6 | 5 |
| 2006 | 2 | 5 |
| 2007 | 3 | 4 |
| 2008 | 2 | 7 |
| 2009 | 2 | 3 |
| 2010 | 0 | 6 |
| 2011 | 2 | 3 |
| 2012 | 3 | 10 |
| 2013 | 2 | 3 |
| 2014 | 1 | 6 |
| 2015 | 6 | 13 |
| 2016 | 12 | 3 |
| 2017 | 10 | 5 |
| 2018 | 7 | 4 |
| 2019 | 6 | 2 |
| 2020 | 2 | 0 |
| 2021 | 3 | 4 |
| 2022 | 5 | 6 |
| 2023 | 3 | 4 |
| 2024 | 5 | 5 |
| 2025 | 1 | 3 |
| 2026 | 1 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for providing a stream comprising a high proportion of 2,4,4-trimethylpent-1-ene22 Sep 2026US 12,741,916 B2Evonik Oxeno GmbH
- Isomerization of linear olefins with solid acid catalysts and primary esters8 Apr 2025US 12,269,796 B2Chevron Phillips Chemical Company LP
- Use of divided wall technology to produce high purity methanol31 Dec 2024US 12,180,129 B2Lummus Technology Inc.
- Processes for producing poly alpha olefins and apparatuses therefor17 Sep 2024US 12,091,380 B2ExxonMobil Chemical Patents Inc.
- Methods for making linear internal olefins from mixtures of linear and branched olefins6 Aug 2024US 12,054,443 B2Chevron Phillips Chemical Company LP
- Process synthesizing sustainable aviation fuel compositions2 Apr 2026US 2026/0092023 A1Visolis, Inc.
- Process for synthesizing polymer compositions from starting materials comprising a double bond2 Apr 2026US 2026/0092130 A1Visolis, Inc.
- Compositions for fuel blending made by a sustainable process, and sustainable fuel compositions therefrom2 Apr 2026US 2026/0092228 A1Visolis, Inc.
- High energy density rocket fuel compositions26 Feb 2026US 2026/0055330 A1Visolis, Inc.
- Process for synthesizing tackifying compositions from starting materials comprising a double bond29 Jan 2026US 2026/0028433 A1Visolis, Inc.
Most cited
By later US patents
- Catalytic distillation process146US 4,232,177 AChemical Research & Licensing Company · 1980
- Process for separating isobutene from C.sub.4 streams110US 4,242,530 AChemical Research & Licensing Company · 1980
- Oligomerized olefins for lubricant stock109US 4,367,352 ATexaco Inc. · 1983
- Catalyst system for separating isobutene from C.sub.4 streams101US 4,215,011 AChemical Research & Licensing Company · 1980
- Iso-C.sub.4 compound reactions with perfluorosulfonic acid resin catalysts85US 4,065,512 APetro-Tex Chemical Corporation · 1977