Company Filing History:

2 out of 317

Southwest Petroleum University

patents

2 out of 2

Engineering Technology Research Institute, Southwest Oil and Gas Field Company of Petro China

patents

where one patent can have more than one assignee

Years Active: 2023

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2 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11733121 - Sealing integrity evaluation device for high-temperature and high- pressure casing-cement ring-formation and method thereof (2023-08-22),

2. 11583822 - Intermediate gas concentration-regulating piston pressure device for high-temperature autoclave and gas distribution method (2023-02-21),

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Huali Zhang

Company Filing History:

Years Active: 2023