- 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: 252
10-year publication summary
|
18
|
9
|
13
|
14
|
16
|
18
|
26
|
13
|
12
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Corning Incorporated | 10426 |
38 |
| Hoya Corporation | 2736 |
35 |
| Ohara Inc. | 210 |
18 |
| Agc, Inc. | 5320 |
16 |
| Nippon Electric Glass Co., Ltd. | 2512 |
13 |
| CDGM Glass Co., Ltd | 145 |
11 |
| SCHOTT AG | 1736 |
9 |
| Nikon Corporation | 7306 |
8 |
| LG Electronics Inc. | 75045 |
7 |
| Asahi Glass Company, Limited | 2668 |
7 |
| Resonac Corporation | 3230 |
7 |
| Hitachi, Ltd. | 15904 |
6 |
| Upterior, LLC | 10 |
6 |
| Sumita Optical Glass, Inc. | 44 |
5 |
| Boe Technology Group Co., Ltd. | 43067 |
4 |
| Hikari Glass Co., Ltd. | 11 |
4 |
| Alps Electric Co., Ltd. | 785 |
3 |
| Central Glass Company, Limited | 1286 |
3 |
| Hoya Optical Technology (Weihai) Co., Ltd. | 11 |
3 |
| Konica Minolta, Inc. | 9032 |
2 |
| Other owners | 47 |