C08C 2/02
Purification
C08C2/02 (Purification) appears on 90 US grants and 82 published applications in this corpus.
Search patents in C08C- Granted patents
- 90
- Published applications
- 82
- Assignees
- 47
- Inventors
- 197
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 1 |
| 2004 | 2 | 3 |
| 2005 | 3 | 1 |
| 2006 | 1 | 2 |
| 2007 | 2 | 3 |
| 2008 | 0 | 1 |
| 2009 | 1 | 5 |
| 2010 | 2 | 0 |
| 2011 | 2 | 2 |
| 2012 | 1 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 5 |
| 2015 | 2 | 9 |
| 2016 | 5 | 7 |
| 2017 | 8 | 11 |
| 2018 | 4 | 4 |
| 2019 | 7 | 8 |
| 2020 | 6 | 3 |
| 2021 | 4 | 2 |
| 2022 | 3 | 3 |
| 2023 | 1 | 1 |
| 2024 | 2 | 3 |
| 2025 | 1 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Extraction of guayule resin28 Jul 2026US 12,691,391 B2Bridgestone Corporation
- Methods for producing polyisoprene latex dispersions12 May 2026US 12,624,131 B2Bridgestone Corporation
- Processes for the removal of rubber from non-Hevea plants15 Jul 2025US 12,359,004 B2Bridgestone Corporation
- Processes for removing color bodies from guayule3 Dec 2024US 12,157,780 B2Bridgestone Corporation
- Hydrogenated nitrile rubber with reduced catalyst impurity7 May 2024US 11,976,181 B2Zeon Chemicals L.P.
- Processes For The Removal Of Rubber From Non-Hevea Plants6 Nov 2025US 2025/0340676 A1Bridgestone Corporation
- Processes For Removing Color Bodies From Guayule20 Mar 2025US 2025/0092163 A1Bridgestone Corporation
- Hydrogenated nitrile rubber with reduced catalyst impurity11 Jul 2024US 2024/0228757 A1Zeon Chemicals L.P.
- Processes For The Removal Of Rubber From Non-Hevea Plants28 Mar 2024US 2024/0101722 A1Bridgestone Corporation
- Extraction Of Guayule Resin8 Feb 2024US 2024/0042347 A1Bridgestone Corporation
Most cited
By later US patents
- Extraction and fractionation of biopolymers and resins from plant materials45US 7,259,231 B2Yulex Corporation · 2007
- Method of removing lithium compounds from a polymer39US 5,220,100 AShell Oil Company · 1993
- Rapid expanded solvent extraction31US 7,790,036 B2Yulex Corporation · 2010
- Stabilization of siloxane terminated polymers27US 5,659,056 ABridgestone Corporation · 1997
- Phase separation process utilizing a hydrofluorocarbon27US 7,629,397 B2ExxonMobil Chemical Patents Inc. · 2009