C08G 63/78
Preparation processes
C08G63/78 (Preparation processes) appears on 2,483 US grants and 2,515 published applications in this corpus.
Search patents in C08G- Granted patents
- 2,483
- Published applications
- 2,515
- Assignees
- 1,025
- Inventors
- 6,046
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 33 | 0 |
| 1977 | 29 | 0 |
| 1978 | 45 | 0 |
| 1979 | 28 | 0 |
| 1980 | 22 | 0 |
| 1981 | 26 | 0 |
| 1982 | 22 | 0 |
| 1983 | 18 | 0 |
| 1984 | 28 | 0 |
| 1985 | 17 | 0 |
| 1986 | 16 | 0 |
| 1987 | 19 | 0 |
| 1988 | 14 | 0 |
| 1989 | 16 | 0 |
| 1990 | 24 | 0 |
| 1991 | 29 | 0 |
| 1992 | 28 | 0 |
| 1993 | 33 | 0 |
| 1994 | 32 | 0 |
| 1995 | 54 | 0 |
| 1996 | 48 | 0 |
| 1997 | 61 | 0 |
| 1998 | 71 | 0 |
| 1999 | 64 | 0 |
| 2000 | 55 | 0 |
| 2001 | 67 | 21 |
| 2002 | 81 | 66 |
| 2003 | 75 | 68 |
| 2004 | 57 | 86 |
| 2005 | 35 | 88 |
| 2006 | 64 | 93 |
| 2007 | 57 | 95 |
| 2008 | 35 | 87 |
| 2009 | 41 | 98 |
| 2010 | 63 | 73 |
| 2011 | 43 | 83 |
| 2012 | 54 | 85 |
| 2013 | 59 | 98 |
| 2014 | 71 | 91 |
| 2015 | 82 | 108 |
| 2016 | 81 | 89 |
| 2017 | 66 | 95 |
| 2018 | 69 | 89 |
| 2019 | 76 | 106 |
| 2020 | 68 | 116 |
| 2021 | 72 | 124 |
| 2022 | 65 | 119 |
| 2023 | 60 | 143 |
| 2024 | 82 | 157 |
| 2025 | 76 | 136 |
| 2026 | 52 | 101 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Biodegradable polyester resin prepared by adding reaction rate control agent and molecular weight increasing agent derived from biomass and method for preparing same6 Oct 2026US 12,753,275 B2Bioplastics Innovations Limited
- Polyester copolymer having excellent strength, and product comprising the same6 Oct 2026US 12,753,276 B2SK Chemicals Co., Ltd.
- Method for preparing glutaryl-bridged bis-biogenic guanidine chelate and method for preparing polybutylene succinate22 Sep 2026US 12,742,039 B2Polytex Chemical Engineering Co., Ltd.
- Process for producing bis(2-hydroxyethyl) terephthalate in liquid form by depolymerization of polyethylene terephthalate (PET)15 Sep 2026US 12,735,551 B2Chempet S.r.I
- Ring-opening polymerizations using a flow reactor8 Sep 2026US 12,729,271 B2International Business Machines Corporation
- Polyesters and a process for preparing these polyesters8 Oct 2026US 2026/0308313 A1Evonik Operations GmbH
- Thermoplastic polyester elastomer resin and preparation method therefor8 Oct 2026US 2026/0308314 A1SK Chemicals Co., Ltd.
- Manufacturing method of polyethylene furandicarboxylate8 Oct 2026US 2026/0308316 A1Nan Ya Plastics Corporation
- Cyclodepolymerization method for aromatic polyesters8 Oct 2026US 2026/0308350 A1Soochow University
- Novel pet degrading enzyme and use thereof8 Oct 2026US 2026/0308546 A1Cj Cheiljedang Corporation
Most cited
By later US patents
- Polyester process189US 6,063,827 AXerox Corporation · 2000
- Method of post-polymerization stabilization of high activity catalysts in continuous polyethylene terephthalate production155US 5,898,058 AWellman, Inc. · 1999
- Isosorbide containing polyesters and methods for making same138US 6,063,464 AHNA Holdings, Inc. · 2000
- Process for preparing copolyesters of terephthalic acid ethylene glycol and 1 4-cyclohexanedimethanol exhibiting a neutral hue high clarity and increased brightness137US 5,681,918 AEastman Chemical Company · 1997
- Process and catalyst-inhibitor systems for preparing synthetic linear polyesters136US 3,962,189 AEastman Kodak Company · 1976