LexDanaLexDanabeta
Inventor

Rongjie Zhu

Inventor
Daqing, CN

Overview

2→
Patents
2013–2014
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 2 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E21Bprimary
E21BEarth or rock drilling50%
B01DSeparation25%
F04BPositive-displacement machines for liquids25%
PatentTitleYear
8,757,257'Crown-shaped separation device for separating oil and water in well'20148,453,726'Corrugated settling cup and a multi-cup uniform flux gas anchor'2013

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2013–2014Patents assigned to DAQING OILFIELD CO LTD (2)· patent assignee history
2013Patents assigned to LI LI (1)· patent assignee history
2013Patents assigned to WAN JUN (1)· patent assignee history
2013Patents assigned to WANG DEMIN (1)· patent assignee history
2013Based in Heilongjiang, CN· patent location history
2014Patents assigned to PETROCHINA CO LTD (1)· patent assignee history
2014Based in Daqing, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DAQING OILFIELD CO LTD22013–2014
LI LI12013
PETROCHINA CO LTD12014
WAN JUN12013
WANG DEMIN12013
Locations
LocationPatentsSpan
Daqing, CN12014
Heilongjiang, CN12013