IP Library › Assignment 036230/0595
Patent Assignment
Reel/Frame 036230/0595

Release of Security Interest

Recorded: 2015-07-31 Pages: 3
Assignor
Assignee
KEYSTONE DRILL SERVICES, LLC
184 ALISA STREET, SOMERSET, PENNSYLVANIA, 15501
Covered Properties (2)
Multi-Sectional Percussive Drill Bit Assembly
Patent: 7,389,833 →
Application: 11/422,625 →
Publication: US 2006/0278433
Multi-Sectional Percussive Drill Bit Assembly
Patent: 7,419,017 →
Application: 11/563,350 →
Publication: US 2007/0095576
Related Assignments (6)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest Jun 7, 2006
From: WALKER, THOMAS A.; MEANS, STEPHEN R.; SMITH, RICHARD
To: KEYSTONE DRILL SERVICES, INC.
Reel/Frame 017735/0386 →
Assignment of Assignor's Interest Nov 27, 2006
From: WALKER, THOMAS A.; MEANS, STEPHEN R.; SMITH, RICHARD K., JR.
To: KEYSTONE DRILL SERVICES, INC.
Reel/Frame 018553/0382 →
Assignment of Assignor's Interest May 27, 2008
From: KEYSTONE DRILL SERVICES, INC.
To: KEYSTONE DRILL SERVICES, LLC
Reel/Frame 021005/0039 →
Security Agreement May 27, 2008
From: KEYSTONE DRILL SERVICES, LLC
To: THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, AS COLLATERAL AGENT
Reel/Frame 021005/0193 →
Assignment of Assignor's Interest Dec 9, 2008
From: KEYSTONE DRILL SERVICES, INC.
To: KEYSTONE AIR & DRILL SUPPLY CO.
Reel/Frame 021936/0872 →
Assignment of Assignor's Interest Oct 22, 2009
From: KEYSTONE DRILL SERVICES, LLC
To: KEYSTONE AIR & DRILL SUPPLY CO.
Reel/Frame 023401/0963 →