CN203383744U - 煤矿用单向止回钻杆 - Google Patents
煤矿用单向止回钻杆 Download PDFInfo
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- CN203383744U CN203383744U CN201320427863.8U CN201320427863U CN203383744U CN 203383744 U CN203383744 U CN 203383744U CN 201320427863 U CN201320427863 U CN 201320427863U CN 203383744 U CN203383744 U CN 203383744U
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- drill rod
- drilling rod
- spool
- rod body
- hole
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Abstract
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201320427863.8U CN203383744U (zh) | 2013-07-18 | 2013-07-18 | 煤矿用单向止回钻杆 |
Applications Claiming Priority (1)
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CN201320427863.8U CN203383744U (zh) | 2013-07-18 | 2013-07-18 | 煤矿用单向止回钻杆 |
Publications (1)
Publication Number | Publication Date |
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CN203383744U true CN203383744U (zh) | 2014-01-08 |
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CN201320427863.8U Expired - Fee Related CN203383744U (zh) | 2013-07-18 | 2013-07-18 | 煤矿用单向止回钻杆 |
Country Status (1)
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CN (1) | CN203383744U (zh) |
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2013
- 2013-07-18 CN CN201320427863.8U patent/CN203383744U/zh not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee |
Owner name: ZHENGZHOU YUANJIAN SAFETY EQUIPMENT CO., LTD. Free format text: FORMER NAME: ZHENGZHOU YUANJIAN COAL MINE EQUIPMENT CO., LTD. |
|
CP01 | Change in the name or title of a patent holder |
Address after: Xinmi City Town Village 452300 meters persimmon Bay Henan city of Zhengzhou Province Patentee after: ZHENGZHOU YUANJIAN SAFETY EQUIPMENT CO., LTD. Address before: Xinmi City Town Village 452300 meters persimmon Bay Henan city of Zhengzhou Province Patentee before: Zhengzhou Yuanjian Coal Mine Equipment Co., Ltd. |
|
C56 | Change in the name or address of the patentee | ||
CP02 | Change in the address of a patent holder |
Address after: Xinmi City Town Village 452370 meters persimmon Bay Henan city of Zhengzhou Province Patentee after: ZHENGZHOU YUANJIAN SAFETY EQUIPMENT CO., LTD. Address before: Xinmi City Town Village 452300 meters persimmon Bay Henan city of Zhengzhou Province Patentee before: ZHENGZHOU YUANJIAN SAFETY EQUIPMENT CO., LTD. |
|
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20180718 |
|
CF01 | Termination of patent right due to non-payment of annual fee |