- 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 3/155 - 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: 124
10-year publication summary
|
4
|
2
|
4
|
5
|
13
|
7
|
6
|
10
|
12
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hoya Corporation | 2822 |
23 |
| Ohara Inc. | 200 |
21 |
| Corning Incorporated | 9932 |
16 |
| Nippon Electric Glass Co., Ltd. | 2299 |
12 |
| CDGM Glass Co., Ltd | 124 |
11 |
| Nikon Corporation | 7162 |
7 |
| Asahi Glass Company, Limited | 2985 |
6 |
| The University of Tokyo | 3903 |
4 |
| Canon Inc. | 36841 |
3 |
| Agc, Inc. | 4029 |
3 |
| Hamamatsu Photonics K.K. | 4161 |
2 |
| Sumita Optical Glass, Inc. | 42 |
2 |
| 3m Innovative Properties Company | 18406 |
1 |
| Samsung Display Co., Ltd. | 30585 |
1 |
| Hitachi, Ltd. | 16452 |
1 |
| Konica Minolta Opto, Inc. | 1179 |
1 |
| DENTSPLY International Inc. | 457 |
1 |
| Ferro Corporation | 279 |
1 |
| Nippon Sheet Glass Company, Limited | 992 |
1 |
| OCI Company Ltd. | 131 |
1 |
| Other owners | 6 |