How many patents does
Daqing Petroleum Administration Bureau have?
patents
991
families
921
granted
76
applications
915
CN
991
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Daqing Petroleum Administration Bureau
Top ten assignees appearing on patents
2009 - 2018
2018
Daqing Petroleum Administration Bureau
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| epon user port tester | 2 | 2015 |
| micro-foam drilling fluid | 2 | 2009 |
| pneumatic telescopic type inside-pipe sweeper | 2 | 2015 |
| synchronous detection method for multiple pipes of oil well gathering and transporting p… 🛈 | 2 | 2015 |
| 200-deg c resistant cement paste for well cementation | 2 | 2011 |
| curable leak-stopping agent | 2 | 2011 |
| anti-reverse device of electric submersible pump | 2 | 2015 |
| catalyst for preparing crylic acid from propane through selective oxidation and preparat… 🛈 | 2 | 2011 |
| gas-preventing and corrosion-preventing connection method for lead sheath oil-submersibl… 🛈 | 2 | 2015 |
| method for determining content of fracturing fluid in oilfield sewage | 2 | 2015 |