C08G 64/406
Purifying
Official title: {Purifying; Drying}
C08G64/406 (Purifying) appears on 105 US grants and 80 published applications in this corpus.
Search patents in C08G- Granted patents
- 105
- Published applications
- 80
- Assignees
- 55
- Inventors
- 384
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 8 | 3 |
| 2003 | 5 | 4 |
| 2004 | 4 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 8 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 3 | 5 |
| 2012 | 2 | 2 |
| 2013 | 3 | 2 |
| 2014 | 1 | 5 |
| 2015 | 3 | 5 |
| 2016 | 6 | 5 |
| 2017 | 7 | 6 |
| 2018 | 3 | 4 |
| 2019 | 6 | 5 |
| 2020 | 4 | 2 |
| 2021 | 3 | 5 |
| 2022 | 0 | 7 |
| 2023 | 1 | 1 |
| 2024 | 5 | 0 |
| 2025 | 2 | 2 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing polycarbonate resin, and molded body29 Jul 2025US 12,371,530 B2Mitsubishi Gas Chemical Company, Inc.
- Method for separating organic zinc catalyst using filtering membrane27 May 2025US 12,312,442 B2LG Chem.Ltd.
- Thermoplastic polymers and method to make them31 Dec 2024US 12,180,343 B2LUMAS Polymers LLC
- Purification process for polyether-carbonate polyols19 Nov 2024US 12,146,027 B2Dow Global Technologies LLC
- Method for separating organozinc catalyst from polyalkylene carbonate polymerization solution3 Sep 2024US 12,076,714 B2LG Chem.Ltd.
- Surface-active agent1 Oct 2026US 2026/0297250 A1Econic Technologies Ltd.
- Process for producing polycarbonate17 Sep 2026US 2026/0275034 A1Sabic Global Technologies B.V.
- Polyalkylene carbonate resin composition and method for preparing the same6 Aug 2026US 2026/0226231 A1LG Chem.Ltd.
- Method for producing refined polycarbonate resin19 Mar 2026US 2026/0078217 A1Mitsubishi Gas Chemical Company, Inc.
- Polycarbonate production method, dihydroxy compound recovery method, and polycarbonate production apparatus9 Oct 2025US 2025/0313666 A1Asahi Kasei Kabushiki Kaisha
Most cited
By later US patents
- Process for cleaning thermoplasts by friction compacting53US 5,306,803 ABayer Aktiengesellschaft · 1994
- Method for polymerizing aromatic bischloroformate composition to polycarbonate35US 4,737,573 AGeneral Electric Company · 1988
- Method for quenching of catalyst in the production of low molecular weight polycarbonates29US 6,177,536 B1General Electric Company · 2001
- Method for removing volatile components from solid polymeric materials24US 6,365,710 B1General Electric Company · 2002
- Method for producing purified polycarbonate resin with fluid containing CO.sub.217US 4,918,160 AMitsubishi Gas Chemical Company, Inc. · 1990