IP Library › Assignment 025547/0705
Patent Assignment
Reel/Frame 025547/0705

Assignment of Assignor's Interest

Recorded: 2010-12-21 Pages: 6
Assignors
ZHANG, KEWEI
Executed: 2010-05-19
WIGGINS, CHRIS
Executed: 2010-05-19
Assignee
TRICAN WELL SERVICE LTD.
645-7TH AVENUE SW, SUITE 2900, CALGARY, CANADA
Covered Property (1)
Well Service Compositions for Consolidation of Particulates in Subterranean Coal Seams
Patent: 8,499,835 →
Application: 12/664,036 →
Publication: US 2011/0011589
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Corrective Assignment to Correct the Application Number, Which Was Incorrectly Listed as 12/644,036 Previously Recorded on Reel 025547 Frame 0705. Assignor(S) Hereby Confirms the Text of the Original Assignment Shows in Bold Type the Correct Application Number 12/664,036.. Feb 7, 2011
From: ZHANG, KEWEI; WIGGINS, CHRIS
To: TRICAN WELL SERVICES, LTD.
Reel/Frame 025755/0918 →
Security Interest Jan 13, 2016
From: TRICAN WELL SERVICE LTD.
To: COMPUTERSHARE TRUST COMPANY OF CANADA
Reel/Frame 037482/0702 →
Security Interest Jun 2, 2022
From: FEDORA, BRADLEY P.D.
To: OLYMPIA TRUST COMPANY
Reel/Frame 060087/0101 →