CN215108813U - 一种防砂防脱泥浆脉冲大活塞 - Google Patents
一种防砂防脱泥浆脉冲大活塞 Download PDFInfo
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- CN215108813U CN215108813U CN202120148948.7U CN202120148948U CN215108813U CN 215108813 U CN215108813 U CN 215108813U CN 202120148948 U CN202120148948 U CN 202120148948U CN 215108813 U CN215108813 U CN 215108813U
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Effective date of registration: 20220818 Address after: 100070, No. 39, No. 12, No. 188, South Fourth Ring Road, Beijing, Fengtai District Patentee after: BEIJING LIUHE GREATNESS TECHNOLOGY Co.,Ltd. Address before: Room 2404, block B, Haiyi international, Fengcheng 5th Road, economic and Technological Development Zone, Xi'an City, Shaanxi Province Patentee before: Xi'an Tianke mingchuang Petroleum Technology Service Co.,Ltd. |
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211210 Termination date: 20220120 |
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CF01 | Termination of patent right due to non-payment of annual fee |