- All sections
- C - Chemistrymetallurgy
- C03C - Chemical composition of glasses, glazes or vitreous enamelssurface treatment of glasssurface treatment of fibres or filaments made from glass, minerals or slagsjoining glass to glass or other materials
- C03C 3/21 - Silica-free oxide glass compositions containing phosphorus containing titanium, zirconium, vanadium, tungsten or molybdenum
Patent holdings for IPC class C03C 3/21
Total number of patents in this class: 246
10-year publication summary
|
19
|
18
|
9
|
13
|
14
|
16
|
18
|
25
|
13
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hoya Corporation | 2745 |
36 |
| Corning Incorporated | 10258 |
35 |
| Ohara Inc. | 217 |
21 |
| Agc, Inc. | 4820 |
15 |
| Nippon Electric Glass Co., Ltd. | 2454 |
13 |
| CDGM Glass Co., Ltd | 137 |
10 |
| SCHOTT AG | 1713 |
9 |
| Nikon Corporation | 7159 |
8 |
| Asahi Glass Company, Limited | 2793 |
8 |
| Resonac Corporation | 2780 |
7 |
| Upterior, LLC | 10 |
6 |
| LG Electronics Inc. | 72890 |
5 |
| Hitachi, Ltd. | 15467 |
5 |
| Boe Technology Group Co., Ltd. | 40988 |
4 |
| Sumita Optical Glass, Inc. | 43 |
4 |
| Hikari Glass Co., Ltd. | 11 |
4 |
| Alps Electric Co., Ltd. | 813 |
3 |
| Central Glass Company, Limited | 1265 |
3 |
| Hoya Optical Technology (Weihai) Co., Ltd. | 9 |
3 |
| Konica Minolta, Inc. | 8710 |
2 |
| Other owners | 45 |