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Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2021.01) |
E21D 11/00 |
| (11) | Number of the document | 6876 |
| (13) | Kind of document | B |
| (21) | Application number | 2021 523 |
| (22) | Date of filing the application | 2021-05-19 |
| (41) | Date of publication of the application | 2021-11-25 |
| (45) | Date of publication of patent | 2021-12-10 |
| (30) | Number | Date | Country code |
| 202011618835.5 | 2020-12-31 | CN |
| (71) |
Chongqing Vocational Institute of Engineering,
No.1, North-South Avenue, Bingjiang New Town, Jiangjin District, Chongqing City,
CN
Jiangsu Vocational Institute of Architectural Technology, No. 26 , Xueyuan Road, Quanshan District, Xuzhou City, Jiangsu Province, CN |
| (72) |
Xiaoming YOU, CN
Zengqiang YANG, CN |
| (73) |
Chongqing Vocational Institute of Engineering,
No.1, North-South Avenue, Bingjiang New Town, Jiangjin District, Chongqing City,
CN
Jiangsu Vocational Institute of Architectural Technology, No. 26 , Xueyuan Road, Quanshan District, Xuzhou City, Jiangsu Province, CN |
| (74) |
Aušra PAKĖNIENĖ,
AAA Law, A. Goštauto g. 40B, Verslo centras "Dvyniai", LT-03163 Vilnius,
LT
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| (54) | A shield tunnel subsidence control steel casing slurry reinforcement device |
| Payment date | Validity (years) | Amount | |
| 2023-05-19 | 3 | 81.00 EUR |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 2024-05-19 |