- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 491/048 - Ortho-condensed systems with only one oxygen atom as ring hetero atom in the oxygen-containing ring the oxygen-containing ring being five-membered
Patent holdings for IPC class C07D 491/048
Total number of patents in this class: 2854
10-year publication summary
|
206
|
211
|
228
|
217
|
226
|
257
|
292
|
228
|
223
|
176
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Chem, Ltd. | 17978 |
82 |
| LT Materials Co., Ltd. | 441 |
82 |
| Idemitsu Kosan Co., Ltd. | 4285 |
76 |
| Semiconductor Energy Laboratory Co., Ltd. | 11877 |
67 |
| Merck Patent GmbH | 5755 |
63 |
| Duk San Neolux Co., Ltd. | 703 |
62 |
| Merck Sharp & Dohme LLC | 3734 |
49 |
| Samsung Display Co., Ltd. | 39154 |
45 |
| Vertex Pharmaceuticals Incorporated | 1577 |
41 |
| Boehringer Ingelheim International GmbH | 4480 |
40 |
| Universal Display Corporation | 2113 |
37 |
| Rohm and Haas Electronic Materials Korea Ltd. | 332 |
36 |
| Bristol-myers Squibb Company | 4761 |
32 |
| Samsung SDI Co., Ltd. | 10924 |
31 |
| Genentech, Inc. | 4147 |
29 |
| Kyulux, Inc. | 255 |
28 |
| Novartis AG | 10172 |
27 |
| Enanta Pharmaceuticals, Inc. | 427 |
25 |
| Takeda Pharmaceutical Company Limited | 2700 |
23 |
| Amgen Inc. | 4486 |
22 |
| Other owners | 1957 |