- 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 3/068 - Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
Patent holdings for IPC class C03C 3/068
Total number of patents in this class: 514
10-year publication summary
|
14
|
23
|
40
|
31
|
33
|
38
|
29
|
33
|
39
|
27
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hoya Corporation | 2754 |
66 |
| CDGM Glass Co., Ltd | 139 |
59 |
| Ohara Inc. | 212 |
56 |
| Nippon Electric Glass Co., Ltd. | 2470 |
49 |
| Corning Incorporated | 10314 |
41 |
| Agc, Inc. | 4922 |
38 |
| SCHOTT AG | 1711 |
31 |
| Nikon Corporation | 7265 |
15 |
| Asahi Glass Company, Limited | 2760 |
14 |
| LG Electronics Inc. | 73578 |
9 |
| Sumita Optical Glass, Inc. | 44 |
9 |
| Hikari Glass Co., Ltd. | 11 |
6 |
| Hoya Optical Technology (Weihai) Co., Ltd. | 9 |
6 |
| Olympus Corporation | 13140 |
5 |
| Central Glass Company, Limited | 1271 |
5 |
| Nihon Yamamura Glass Co., Ltd. | 131 |
5 |
| SCHOTT Glass Technologies (Suzhou) Co. Ltd. | 103 |
5 |
| China Building Materials Academy | 24 |
4 |
| Toyo Seikan Group Holdings, Ltd. | 844 |
4 |
| The University of Tokyo | 4208 |
4 |
| Other owners | 83 |