- 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: 2666
10-year publication summary
|
165
|
185
|
201
|
200
|
199
|
200
|
217
|
268
|
216
|
182
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Idemitsu Kosan Co., Ltd. | 4223 |
76 |
| LT Materials Co., Ltd. | 413 |
76 |
| LG Chem, Ltd. | 17685 |
73 |
| Semiconductor Energy Laboratory Co., Ltd. | 11534 |
63 |
| Duk San Neolux Co., Ltd. | 664 |
62 |
| Merck Patent GmbH | 5758 |
59 |
| Merck Sharp & Dohme LLC | 3735 |
49 |
| Samsung Display Co., Ltd. | 36065 |
43 |
| Vertex Pharmaceuticals Incorporated | 1621 |
43 |
| Boehringer Ingelheim International GmbH | 4644 |
37 |
| Universal Display Corporation | 1956 |
37 |
| Rohm and Haas Electronic Materials Korea Ltd. | 330 |
36 |
| Genentech, Inc. | 4006 |
29 |
| Samsung SDI Co., Ltd. | 8990 |
29 |
| Novartis AG | 10635 |
28 |
| Bristol-myers Squibb Company | 4833 |
26 |
| Kyulux, Inc. | 238 |
26 |
| Takeda Pharmaceutical Company Limited | 2719 |
25 |
| Enanta Pharmaceuticals, Inc. | 433 |
24 |
| SFC Co., Ltd. | 323 |
20 |
| Other owners | 1805 |