- 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 3/155 - Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium
Patent holdings for IPC class C03C 3/155
Total number of patents in this class: 129
10-year publication summary
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2
|
4
|
5
|
13
|
7
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6
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10
|
13
|
8
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hoya Corporation | 2755 |
23 |
| Ohara Inc. | 214 |
21 |
| Corning Incorporated | 10284 |
19 |
| Nippon Electric Glass Co., Ltd. | 2464 |
14 |
| CDGM Glass Co., Ltd | 138 |
11 |
| Nikon Corporation | 7172 |
8 |
| Asahi Glass Company, Limited | 2771 |
5 |
| The University of Tokyo | 4193 |
4 |
| Agc, Inc. | 4879 |
4 |
| Canon Inc. | 40165 |
3 |
| Hamamatsu Photonics K.K. | 4426 |
2 |
| Sumita Optical Glass, Inc. | 44 |
2 |
| Samsung Display Co., Ltd. | 34984 |
1 |
| Hitachi, Ltd. | 15521 |
1 |
| Konica Minolta Opto, Inc. | 1071 |
1 |
| DENTSPLY International Inc. | 396 |
1 |
| Ferro Corporation | 240 |
1 |
| Nippon Sheet Glass Company, Limited | 988 |
1 |
| OCI Company Ltd. | 154 |
1 |
| SCHOTT AG | 1712 |
1 |
| Other owners | 5 |