LexDanaLexDanabeta
Inventor

Kwong-Onn Chan

Inventor
Edmonton, CA

Overview

11→
Patents
2004–2020
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 11 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
10,605,032Electrically insulated tubing hanger system20209,103,183'Method and apparatus for launching multiple balls in a well'20158,919,453'Scalloped landing ring'20148,141,641'Backup safety flow control system for concentric drill string'20127,823,634'Wellhead isolation sleeve assembly'20107,647,989'Backup safety flow control system for concentric drill string'20107,090,033'Drill string shutoff valve'20067,069,995'Remedial system to flush contaminants from tubing string'20067,017,682'Drill string shutoff valve'20066,918,452'Drill string shutoff valve'20056,736,208'Wellhead production pumping tree with access port'2004

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2004–2015Based in Edmonton, CA· patent location history
2005–2015Patents assigned to VETCO GRAY INC (9)· patent assignee history
2012–2015Patents assigned to HE HENRY X (2)· patent assignee history
2012Patents assigned to CHAN KWONG O (1)· patent assignee history
2014–2015Patents assigned to AMBROSE GENE (2)· patent assignee history
2014–2015Patents assigned to CHAN KWONG-ONN (2)· patent assignee history
2020Based in Calgary, CA· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
VETCO GRAY INC92005–2015
AMBROSE GENE22014–2015
CHAN KWONG-ONNself22014–2015
HE HENRY X22012–2015
CHAN KWONG Oself12012
Locations
LocationPatentsSpan
Edmonton, CA102004–2015
Calgary, CA12020