IP Library › Assignment 027139/0820
Patent Assignment
Reel/Frame 027139/0820

Change of Name

Recorded: 2011-10-28 Pages: 2
Assignor
TECH-STAR ENERGY SERVICES INC.
Executed: 2010-03-04
Assignee
TECH-STAR FLUID SYSTEMS INC.
1110, 640 - 8TH AVENUE SW, CALGARY, T2P 1G7, CANADA
Covered Properties (2)
Drilling Fluid and Methods
Patent: 7,989,399 →
Application: 12/025,164 →
Publication: US 2008/0217064
Drilling Fluid and Method for Drilling in Coal-Containing Formations
Patent: 8,387,723 →
Application: 12/529,583 →
Publication: US 2010/0089650
Related Assignments (4)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest Apr 18, 2008
From: STOIAN, STEFAN ALEXANDRU; SMITH, CARL KEITH
To: TECHSTAR ENERGY SERVICES INC.
Reel/Frame 020827/0222 →
Assignment of Assignor's Interest Nov 17, 2009
From: STOIAN, STEFAN ALEXANDRU; SMITH, CARL KEITH
To: TECHSTAR ENERGY SERVICES INC.
Reel/Frame 023528/0322 →
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 →