Patent Assignment
Reel/Frame 051761/0180
Change of Name
Recorded: 2020-01-30
Pages: 6
Assignor
ETAGEN, INC.
Executed: 2020-01-07
Assignee
MAINSPRING ENERGY, INC.
3601 HAVEN AVENUE, MENLO PARK, CALIFORNIA, 94025
Covered Properties
(44)
High-Efficiency Linear Combustion Engine
Energy Storage and Conversion in Free-Piston Combustion Engines
Control of Piston Trajectory in a Free-Piston Combustion Engine
Open-Faced Piston Assembly
Reinforced Sealing Rings
Sealing Ring Having a Porous Layer
Application:
16/059,976 →
Publication:
US 2019/0049007
Piston-Integrated Gap Cover
Piston Sealing Ring Assembly Having a Gap Cover Element
Piston Sealing Ring Assemblies
Piston Sealing Ring Assemblies
Piston Seal with Solid Lubricant Applicator
Auto-Braking for an Electromagnetic Machine
Dc-Dc Converter in a Non-Steady System
Sealing Ring Assemblies Configured for Pressure Locking
Sealing Ring Assemblies Configured for Pressure Locking
Dc-Dc Converter in a Non-Steady System
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Managing a Clearance Gap in a Piston Engine
Methods and Systems for Controlling a Multiphase Electromagnetic Machine
Patent:
8,344,669 →
Application:
13/437,659 →
Methods and Systems for Controlling a Multiphase Electromagnetic Machine
High-Efficiency Two-Piston Linear Combustion Engine
High-Efficiency Linear Combustion Engne
High-Efficiency Linear Combustion Engine
High-Efficiency Linear Combustion Engine
High-Efficiency Linear Combustion Engine
High-Efficiency Linear Combustion Engine
High-Efficiency Linear Combustion Engine
Linear Free Piston Combustion Engine with Indirect Work Extraction via Gas Linkage
Mechanism for Maintaining a Clearance Gap
Energy Storage and Conversion in Free-Piston Combustion Engines
Energy Storage and Conversion in Free-Piston Combustion Engines
Control of Piston Trajectory in a Free-Piston Combustion Engine
Patent:
9,657,675 →
Application:
15/087,990 →
Control of Piston Trajectory in a Free-Piston Combustion Engine
Control of Piston Trajectory in a Free-Piston Combustion Engine
Open-Faced Piston Assembly
Patent:
9,856,821 →
Application:
15/294,438 →
Open-Faced Piston Assembly
Piston-Integrated Gap Cover
Auto-Braking for an Electromagnetic Machine
Related Assignments
(22)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Feb 9, 2012
From: LAWLER, JOHN; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 027681/0570 →
Assignment of Assignor's Interest
Aug 10, 2018
From: SVRCEK, MATT; PRUDHOMME, JODIE
To: ETAGEN, INC.
Reel/Frame 046618/0508 →
Assignment of Assignor's Interest
Aug 10, 2018
From: SVRCEK, MATT; PRUDHOMME, JODIE
To: ETAGEN, INC.
Reel/Frame 046618/0463 →
Assignment of Assignor's Interest
Aug 10, 2018
From: SVRCEK, MATT; PRUDHOMME, JODIE; DEJONG, JERRY; HASLER, TOM
To: ETAGEN, INC.
Reel/Frame 046618/0283 →
Assignment of Assignor's Interest
Aug 10, 2018
From: PRUDHOMME, JODIE
To: ETAGEN, INC.
Reel/Frame 046618/0344 →
Assignment of Assignor's Interest
Aug 10, 2018
From: SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 046618/0493 →
Assignment of Assignor's Interest
Aug 10, 2018
From: PRUDHOMME, JODIE; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 046619/0089 →
Assignment of Assignor's Interest
Sep 20, 2018
From: DA COSTA, ANTHONY; POWERS, JOHN
To: ETAGEN, INC.
Reel/Frame 046930/0652 →
Assignment of Assignor's Interest
Jan 3, 2019
From: GADDA, CHRISTOPHER; ROELLE, MATTHEW; SIMPSON, ADAM
To: ETAGEN, INC.
Reel/Frame 047895/0821 →
Assignment of Assignor's Interest
Jan 14, 2019
From: DA COSTA, ANTHONY; ROELLE, MATTHEW; POWERS, JOHN; GORZELIC, PATRICK
To: ETAGEN, INC.
Reel/Frame 048071/0464 →
Assignment of Assignor's Interest
Feb 12, 2019
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 048313/0673 →
Nunc Pro Tunc Assignment
Mar 12, 2019
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 048575/0928 →
Security Interest
Jul 9, 2019
From: ETAGEN, INC.
To: TRINITY CAPITAL FUND III, L.P.
Reel/Frame 049704/0976 →
Assignment of Assignor's Interest
Oct 18, 2019
From: SVRCEK, MATT; PRUDHOMME, JODIE
To: ETAGEN, INC.
Reel/Frame 050760/0430 →
Assignment of Assignor's Interest
Dec 6, 2019
From: ROELLE, MATTHEW; GADDA, CHRISTOPHER
To: ETAGEN, INC.
Reel/Frame 051207/0783 →
Assignment of Assignor's Interest
Dec 6, 2019
From: SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 051223/0916 →
Assignment of Assignor's Interest
Jan 14, 2020
From: SVRCEK, MATT; DEGRAAFF, DAVID
To: ETAGEN, INC.
Reel/Frame 051513/0860 →
Assignment of Assignor's Interest
Jan 16, 2020
From: DA COSTA, ANTHONY; POWERS, JOHN
To: ETAGEN, INC.
Reel/Frame 051540/0798 →
Assignment of Assignor's Interest
Jan 23, 2020
From: SVRCEK, MATT; PRUDHOMME, JODIE
To: ETAGEN, INC.
Reel/Frame 051603/0930 →
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 →