- All sections
- C - Chemistrymetallurgy
- C03B - Manufacture or shaping of glass, or of mineral or slag woolsupplementary processes in the manufacture or shaping of glass, or of mineral or slag wool
- C03B 20/00 - Processes specially adapted for the production of quartz or fused silica articles
Patent holdings for IPC class C03B 20/00
Total number of patents in this class: 367
10-year publication summary
|
8
|
32
|
20
|
28
|
22
|
14
|
24
|
17
|
15
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Heraeus Quarzglas GmbH & Co. KG | 408 |
68 |
| Shin-Etsu Quartz Products Co., Ltd. | 153 |
58 |
| Sumco Corporation | 1125 |
39 |
| Japan Super Quartz Corporation | 38 |
23 |
| Corning Incorporated | 10139 |
17 |
| Asahi Glass Company, Limited | 2881 |
17 |
| Sumitomo Electric Industries, Ltd. | 14990 |
10 |
| Shin-Etsu Chemical Co., Ltd. | 5455 |
9 |
| Agc, Inc. | 4485 |
9 |
| Tosoh Quartz Corporation | 11 |
6 |
| Tosoh SGM Corporation | 14 |
6 |
| LONGi Green Energy Technology Co., Ltd. | 241 |
6 |
| Nikon Corporation | 7119 |
5 |
| Heraeus Quartz America LLC | 7 |
4 |
| Mitsubishi Chemical Corporation | 4453 |
3 |
| Kohoku Kogyo Co.,Ltd. | 50 |
3 |
| Kyushu University, National University Corporation | 1626 |
3 |
| Mitsubishi Materials Corporation | 2407 |
3 |
| Shin-Etsu Handotai Co., Ltd. | 1290 |
3 |
| Tosoh Corporation | 1221 |
3 |
| Other owners | 72 |