C08G 63/823
For the preparation of polylactones or polylactides
Official title: {for the preparation of polylactones or polylactides}
C08G63/823 (For the preparation of polylactones or polylactides) appears on 298 US grants and 364 published applications in this corpus.
Search patents in C08G- Granted patents
- 298
- Published applications
- 364
- Assignees
- 228
- Inventors
- 1,007
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 11 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 2 |
| 2002 | 9 | 4 |
| 2003 | 7 | 3 |
| 2004 | 4 | 12 |
| 2005 | 1 | 8 |
| 2006 | 10 | 5 |
| 2007 | 4 | 8 |
| 2008 | 2 | 13 |
| 2009 | 5 | 15 |
| 2010 | 9 | 13 |
| 2011 | 4 | 14 |
| 2012 | 6 | 14 |
| 2013 | 8 | 21 |
| 2014 | 12 | 22 |
| 2015 | 19 | 26 |
| 2016 | 14 | 13 |
| 2017 | 11 | 16 |
| 2018 | 14 | 17 |
| 2019 | 9 | 14 |
| 2020 | 16 | 15 |
| 2021 | 7 | 22 |
| 2022 | 8 | 15 |
| 2023 | 8 | 14 |
| 2024 | 12 | 28 |
| 2025 | 9 | 16 |
| 2026 | 5 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ring-opening polymerizations using a flow reactor8 Sep 2026US 12,729,271 B2International Business Machines Corporation
- Modified ethylene-vinyl alcohol resin and production method therefor25 Aug 2026US 12,715,964 B2Mitsubishi Chemical Corporation
- Process and system for production of polypropiolactone21 Apr 2026US 12,606,667 B2Novomer, Inc.
- Flow cells27 Jan 2026US 12,534,569 B2Illumina, Inc.
- Copolymer and preparation method thereof13 Jan 2026US 12,522,693 B2LG Chem.Ltd.
- Bismuth-containing catalyst comprising a dicarboxylate ligand3 Sep 2026US 2026/0258188 A1BASF SE
- Polyester-polyethylene glycol block copolymer, preparation method therefor, and use thereof3 Sep 2026US 2026/0258195 A1Hangzhou Shixi Pharmaceutical Technology Co., Ltd.
- Process and System for Production of Polypropiolactone6 Aug 2026US 2026/0226228 A1Novomer, Inc.
- Copolymer and preparation method of copolymer30 Jul 2026US 2026/0217899 A1LG Chem.Ltd.
- Process for the synthesis of polyesterols by ring-opening co-polymerisation of gamma-butyrolactone with other lactones23 Jul 2026US 2026/0209430 A1BASF SE
Most cited
By later US patents
- Polymerization process and product112US 4,273,920 AEli Lilly and Company · 1981
- Heat curable cationically polymerizable compositions and method of curing same with onium salts and reducing agents101US 4,216,288 AGeneral Electric Company · 1980
- Method for producing polylactic acid88US 5,770,682 AShimadzu Corporation · 1998
- Biodegradable optically active copolymer and process for producing the same73US 5,516,883 ATakasago International Corporation · 1996
- Process for preparing polylactic acid66US 5,821,327 AShimadzu Corporation · 1998