Du; Quangen

Patent Applications and Registrations

Patent applications and USPTO patent grants for Du; Quangen.The latest application filed is for "systems and techniques for controlling and monitoring downhole operations in a well".

Company Profile

2.8.10

Du; Quangen - Sugar Land TX
Du; Quangen - Fresno TX

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Systems and techniques for controlling and monitoring downhole operations in a well Grant 11,274,522 - Wang , et al. March 15, 2	2022-03-15
Packer system having lockable mechanism Grant 10,808,493 - Du , et al. October 20, 2	2020-10-20
Systems And Techniques For Controlling And Monitoring Downhole Operations In A Well App 20200115992 - Wang; Chao ; et al.	2020-04-16
Systems and techniques for controlling and monitoring downhole operations in a well Grant 10,502,024 - Wang , et al. Dec	2019-12-10
Packer System Having Lockable Mechanism App 20180106127 - Du; Quangen ; et al.	2018-04-19
Systems And Techniques For Controlling And Monitoring Downhole Operations In A Well App 20180051535 - Wang; Chao ; et al.	2018-02-22
Propellant energy to operate subsea equipment Grant 9,863,202 - Rytlewski , et al. January 9, 2	2018-01-09
Propellant Energy to Operate Subsea Equipment App 20160312563 - Rytlewski; Gary L. ; et al.	2016-10-27
Piping system having an insulated annulus Grant 9,243,478 - Du , et al. January 26, 2	2016-01-26
Temperature compensated accumulator Grant 8,978,766 - Nellessen, Jr. , et al. March 17, 2	2015-03-17
Piping System Having An Insulated Annulus App 20130092389 - Du; Quangen ; et al.	2013-04-18
Temperature Compensated Accumulator App 20130061937 - Nellessen, JR.; Peter ; et al.	2013-03-14
Accumulator Having Operating Fluid Volume Independent Of External Hydrostatic Pressure App 20130062069 - DU; Quangen	2013-03-14

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