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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2020.01) |
B23B 5/00 B23B 27/00 |
| (11) | Number of the document | 6773 |
| (13) | Kind of document | B |
| (21) | Application number | 2020 507 |
| (22) | Date of filing the application | 2020-01-10 |
| (41) | Date of publication of the application | 2020-08-25 |
| (45) | Date of publication of patent | 2020-10-26 |
| (30) | Number | Date | Country code |
| 201910127169.6 | 2019-02-20 | CN |
| (71) |
Qingdao University of Technology,
No. 11, Fushun Road, Shibei District, 266520 Qingdao, Shandong,
CN
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| (72) |
Changhe LI, CN
Heju JI, CN Yanbin ZHANG, CN Jian LUO, CN Haizhou XU, CN Yuchen DIAO, CN Cunzhi DENG, CN Renzhuan LI, CN Qingyang MENG, CN Wei ZHENG, CN Runze LI, CN Yali HOU, CN |
| (73) |
Qingdao University of Technology,
No. 11, Fushun Road, Shibei District, 266520 Qingdao, Shandong,
CN
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| (74) |
Reda ŽABOLIENĖ,
METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius,
LT
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| (54) | TOOL DEVICE AND METHOD FOR ROUGH-MACHINING PULLEY GROOVE |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 2022-01-10 |