- All sections
- C - Chemistry; metallurgy
- C03C - Chemical composition of glasses, glazes or vitreous enamels; surface treatment of glass; surface treatment of fibres or filaments made from glass, minerals or slags; joining 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: 233
10-year publication summary
|
17
|
19
|
18
|
9
|
13
|
14
|
15
|
18
|
25
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hoya Corporation | 2822 |
37 |
| Corning Incorporated | 9932 |
36 |
| Ohara Inc. | 200 |
21 |
| Nippon Electric Glass Co., Ltd. | 2299 |
12 |
| SCHOTT AG | 1675 |
9 |
| Nikon Corporation | 7162 |
8 |
| Asahi Glass Company, Limited | 2985 |
8 |
| CDGM Glass Co., Ltd | 124 |
8 |
| Agc, Inc. | 4029 |
8 |
| Resonac Corporation | 2233 |
7 |
| Upterior, LLC | 10 |
6 |
| Hitachi, Ltd. | 16452 |
5 |
| Boe Technology Group Co., Ltd. | 35384 |
4 |
| Sumita Optical Glass, Inc. | 42 |
4 |
| Hikari Glass Co., Ltd. | 10 |
4 |
| LG Electronics Inc. | 69257 |
3 |
| Alps Electric Co., Ltd. | 851 |
3 |
| Central Glass Company, Limited | 1244 |
3 |
| Hoya Optical Technology (Weihai) Co., Ltd. | 3 |
3 |
| Konica Minolta, Inc. | 8349 |
2 |
| Other owners | 42 |