IP Library › Assignment 026071/0415
Patent Assignment
Reel/Frame 026071/0415

Assignment of Assignor's Interest

Recorded: 2011-04-04 Pages: 3
Assignors
SIMPSON, ADAM
Executed: 2011-03-31
ROELLE, MATTHEW J.
Executed: 2011-03-31
Assignee
ETAGEN, INC.
186 CONSTITUTION DRIVE, MENLO PARK, CALIFORNIA, 94025
Covered Property (1)
Linear Free Piston Combustion Engine with Indirect Work Extraction via Gas Linkage
Patent: 8,997,699 →
Application: 13/028,053 →
Publication: US 2012/0204836
Related Assignments (5)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Interest Jul 9, 2019
From: ETAGEN, INC.
To: TRINITY CAPITAL FUND III, L.P.
Reel/Frame 049704/0976 →
Change of Name Jan 30, 2020
From: ETAGEN, INC.
To: MAINSPRING ENERGY, INC.
Reel/Frame 051761/0180 →
Security Interest Jun 6, 2025
From: MAINSPRING ENERGY, INC.
To: AVENUE VENTURE OPPORTUNITIES FUND II, L.P., AS AGENT
Reel/Frame 071499/0428 →
Security Agreement Jun 18, 2025
From: TRINITY CAPITAL INC.
To: MAINSPRING ENERGY, INC.
Reel/Frame 071675/0669 →
Security Agreement Jun 18, 2025
From: TRINITY CAPITAL INC.
To: MAINSPRING ENERGY, INC.
Reel/Frame 071675/0697 →