C08F 6/28
Purification
C08F6/28 (Purification) appears on 110 US grants and 108 published applications in this corpus.
Search patents in C08F- Granted patents
- 110
- Published applications
- 108
- Assignees
- 92
- Inventors
- 342
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 3 |
| 2004 | 3 | 5 |
| 2005 | 0 | 4 |
| 2006 | 2 | 9 |
| 2007 | 6 | 7 |
| 2008 | 6 | 3 |
| 2009 | 2 | 1 |
| 2010 | 4 | 3 |
| 2011 | 1 | 1 |
| 2012 | 1 | 5 |
| 2013 | 2 | 2 |
| 2014 | 3 | 4 |
| 2015 | 4 | 4 |
| 2016 | 3 | 1 |
| 2017 | 1 | 5 |
| 2018 | 3 | 4 |
| 2019 | 3 | 8 |
| 2020 | 4 | 4 |
| 2021 | 7 | 13 |
| 2022 | 5 | 1 |
| 2023 | 7 | 3 |
| 2024 | 5 | 10 |
| 2025 | 3 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Deodorization apparatus and method16 Jun 2026US 12,654,362 B2Piovan S.P.A.
- Hydrophilic compound removal method and odor removal method28 Apr 2026US 12,611,480 B2Daikin Industries, Ltd.
- Centralized hydrocarbon treatment in a polymer production process21 Apr 2026US 12,606,648 B2Chevron Phillips Chemical Company LP
- Integrated tower for removing VOC from polypropylene particles2 Dec 2025US 12,485,584 B2Tianhua Institute of Chemical Machinery and Automation Co., Ltd
- Methods for producing graphene from coal21 Oct 2025US 12,448,293 B2Carbon Holdings Intellectual Properties, LLC
- Removal of odorants from polyolefin particles29 Jan 2026US 2026/0028434 A1
- Methods for producing graphene from coal15 Jan 2026US 2026/0015241 A1Carbon Holdings Intellectual Properties, LLC
- Water-soluble polymer comprising hydroxamic acid groups8 Jan 2026US 2026/0008880 A1BASF SE
- Method of preparing vinyl chloride polymer8 May 2025US 2025/0145743 A1LG Chem.Ltd.
- Process for reducing the VOC content of a polyolefin composition20 Mar 2025US 2025/0092167 A1Borealis AG
Most cited
By later US patents
- Orthopaedic device for implantation in the body of an animal and method for making the same29US 7,160,492 B2DePuy Products, Inc. · 2007
- Process for the production of thermoplastic molding materials based on vinyl polymers22US 4,181,788 ABayer Aktiengesellschaft · 1980
- Process for manufacturing ethylene polymers19US 4,342,853 ASociete Chimique des Charbonnages-CdF Chimie · 1982
- Process for washing powdery and/or granular resins and a washing device therefor17US 5,143,554 AIdemitsu Petrochemical Co., Ltd. · 1992
- Polymer devolatilization16US 5,861,474 AThe Dow Chemical Company · 1999