IP Library › Assignment 023528/0322
Patent Assignment
Reel/Frame 023528/0322

Assignment of Assignor's Interest

Recorded: 2009-11-17 Pages: 5
Assignors
STOIAN, STEFAN ALEXANDRU
Executed: 2009-11-10
SMITH, CARL KEITH
Executed: 2009-11-10
Assignee
TECHSTAR ENERGY SERVICES INC.
1110, 640 - 8TH AVENUE SW, CALGARY, T2P 1G7, CANADA
Covered Property (1)
Drilling Fluid and Method for Drilling in Coal-Containing Formations
Patent: 8,387,723 →
Application: 12/529,583 →
Publication: US 2010/0089650
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name Oct 28, 2011
From: TECH-STAR ENERGY SERVICES INC.
To: TECH-STAR FLUID SYSTEMS INC.
Reel/Frame 027139/0820 →
Assignment of Assignor's Interest Feb 21, 2014
From: TECH-STAR FLUID SYSTEMS INC.
To: CANADIAN ENERGY SERVICES L.P.
Reel/Frame 032267/0036 →
Security Interest Jan 30, 2015
From: CANADIAN ENERGY SERVICES L.P.
To: THE BANK OF NOVA SCOTIA
Reel/Frame 034857/0635 →