C08G 64/22
Using carbonyl halides
Official title: using carbonyl halides
C08G64/22 (Using carbonyl halides) appears on 318 US grants and 211 published applications in this corpus.
Search patents in C08G- Granted patents
- 318
- Published applications
- 211
- Assignees
- 70
- Inventors
- 595
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 20 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 1 | 0 |
| 1993 | 8 | 0 |
| 1994 | 13 | 0 |
| 1995 | 10 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 0 |
| 2002 | 7 | 5 |
| 2003 | 7 | 4 |
| 2004 | 5 | 6 |
| 2005 | 3 | 3 |
| 2006 | 2 | 7 |
| 2007 | 4 | 1 |
| 2008 | 2 | 3 |
| 2009 | 4 | 6 |
| 2010 | 7 | 2 |
| 2011 | 1 | 2 |
| 2012 | 4 | 3 |
| 2013 | 1 | 5 |
| 2014 | 3 | 13 |
| 2015 | 8 | 13 |
| 2016 | 13 | 22 |
| 2017 | 25 | 25 |
| 2018 | 16 | 11 |
| 2019 | 15 | 11 |
| 2020 | 12 | 10 |
| 2021 | 6 | 12 |
| 2022 | 6 | 11 |
| 2023 | 3 | 12 |
| 2024 | 5 | 7 |
| 2025 | 10 | 8 |
| 2026 | 3 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for producing polycarbonate—point of addition of the chain terminator14 Jul 2026US 12,679,930 B2Covestro Intellectual Property GmbH & Co.KG
- Process for preparing bisphenol a (BPA) in the presence of at least two impurities23 Jun 2026US 12,662,442 B2Covestro Deutschland AG
- Curable resin composition, molded article and method for producing same10 Feb 2026US 12,545,756 B2Mitsubishi Gas Chemical Company, Inc.
- Molded body including polycarbonate-based resin composition30 Sep 2025US 12,428,557 B2Idemitsu Kosan Co., Ltd.
- Polycarbonate resin composition26 Aug 2025US 12,398,266 B2Idemitsu Kosan Co., Ltd.
- Polycarbonate resin composition and molded article thereof8 Oct 2026US 2026/0308374 A1Idemitsu Kosan Co., Ltd.
- Resin, copolymer, electronic substrate material, resin composition, coating liquid composition, cured product, film, sheet, and electronic substrate24 Sep 2026US 2026/0286175 A1Idemitsu Kosan Co., Ltd.
- Electrolytic solution containing polycarbonate resin and electrolyte obtained therefrom30 Jul 2026US 2026/0221506 A1Mitsubishi Gas Chemical Company, Inc.
- Polycarbonate resin and molded article9 Apr 2026US 2026/0098125 A1Mitsubishi Gas Chemical Company, Inc.
- Method for producing refined polycarbonate resin19 Mar 2026US 2026/0078217 A1Mitsubishi Gas Chemical Company, Inc.
Most cited
By later US patents
- Polycarbonate preparation process90US 6,225,436 B1The Dow Chemical Company · 2001
- Method of preparing polyester carbonates50US 4,286,083 AGeneral Electric Company · 1981
- Continuous production of polycarbonates38US 5,235,026 ABayer Aktiengesellschaft · 1993
- Process for preparing aromatic carbonate polymers37US 3,989,672 AGeneral Electric Company · 1976
- Method for producing a polycarbonate oligomer37US 4,089,888 AIdemitsu Petrochemical Co., Ltd. · 1978