CN201771459U - 一种新型井口密封器 - Google Patents
一种新型井口密封器 Download PDFInfo
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- CN201771459U CN201771459U CN2010201800139U CN201020180013U CN201771459U CN 201771459 U CN201771459 U CN 201771459U CN 2010201800139 U CN2010201800139 U CN 2010201800139U CN 201020180013 U CN201020180013 U CN 201020180013U CN 201771459 U CN201771459 U CN 201771459U
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CN2010201800139U CN201771459U (zh) | 2010-05-06 | 2010-05-06 | 一种新型井口密封器 |
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CN2010201800139U CN201771459U (zh) | 2010-05-06 | 2010-05-06 | 一种新型井口密封器 |
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CN201771459U true CN201771459U (zh) | 2011-03-23 |
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CN2010201800139U Expired - Fee Related CN201771459U (zh) | 2010-05-06 | 2010-05-06 | 一种新型井口密封器 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111021980A (zh) * | 2020-02-17 | 2020-04-17 | 辽宁华实技术有限公司 | 双段自动防喷井口密封器 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111021980A (zh) * | 2020-02-17 | 2020-04-17 | 辽宁华实技术有限公司 | 双段自动防喷井口密封器 |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liaoning Kuak Petroleum Equipment Co., Ltd. Assignor: Zhao Guangyou Contract record no.: 2011210000143 Denomination of utility model: Novel wellhead sealer Granted publication date: 20110323 License type: Exclusive License Record date: 20111010 |
|
EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Liaoning Kuak Petroleum Equipment Co., Ltd. Assignor: Zhao Guangyou Contract record no.: 2011210000143 Date of cancellation: 20111018 |
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EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liaoning Kuak Petroleum Equipment Co., Ltd. Assignor: Zhao Guangyou Contract record no.: 2011210000147 Denomination of utility model: Novel wellhead sealer Granted publication date: 20110323 License type: Exclusive License Record date: 20111018 |
|
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20190506 |
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CF01 | Termination of patent right due to non-payment of annual fee |