- 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: 375
10-year publication summary
|
32
|
20
|
28
|
22
|
14
|
24
|
17
|
15
|
10
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Heraeus Quarzglas GmbH & Co. KG | 417 |
69 |
| Shin-Etsu Quartz Products Co., Ltd. | 144 |
59 |
| Sumco Corporation | 1108 |
43 |
| Japan Super Quartz Corporation | 36 |
22 |
| Corning Incorporated | 10500 |
18 |
| Asahi Glass Company, Limited | 2625 |
17 |
| Sumitomo Electric Industries, Ltd. | 16305 |
10 |
| Agc, Inc. | 5502 |
9 |
| Tosoh SGM Corporation | 15 |
7 |
| Shin-Etsu Chemical Co., Ltd. | 6083 |
6 |
| Tosoh Quartz Corporation | 10 |
6 |
| LONGi Green Energy Technology Co., Ltd. | 438 |
6 |
| Nikon Corporation | 7235 |
4 |
| Heraeus Quartz America LLC | 7 |
4 |
| Mitsubishi Chemical Corporation | 4721 |
3 |
| Kohoku Kogyo Co.,Ltd. | 55 |
3 |
| Kyushu University, National University Corporation | 1707 |
3 |
| Mitsubishi Materials Corporation | 2468 |
3 |
| Shin-Etsu Handotai Co., Ltd. | 1306 |
3 |
| Tosoh Corporation | 1414 |
3 |
| Other owners | 77 |