Patent Assignment
Reel/Frame 071675/0697
Security Agreement
Recorded: 2025-06-18
Pages: 17
Assignor
TRINITY CAPITAL INC.
Executed: 2025-06-06
Assignee
MAINSPRING ENERGY, INC.
3601 HAVEN AVENUE, MENLO PARK, CALIFORNIA, 94025
Covered Properties
(62)
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 Managing a Clearance Gap in a Piston Engine
Patent:
49,259 →
Application:
16/912,538 →
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
High-Efficiency Linear Combustion Engine
High-Efficiency Linear Generator
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
Energy Storage and Conversion in Free-Piston Combustion Engines
Energy Storage and Conversion in Linear Generators
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
Control of Piston Trajectory in a Free-Piston Combustion Engine
Control of Piston Trajectory in a Linear Generator
Control of Piston Trajectory in a Linear Generator
Open-Faced Piston Assembly
Patent:
9,856,821 →
Application:
15/294,438 →
Open-Faced Piston Assembly
Open-Faced Piston Assembly
Open-Faced Piston Assembly
Reinforced Sealing Rings
Reinforced Sealing Rings
Reinforced Sealing Rings
Piston-Integrated Gap Cover
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
Piston Seal with Solid Lubricant Applicator
Auto-Braking for an Electromagnetic Machine
Auto-Braking for an Electromagnetic Machine
Auto-Braking for an Electromagnetic Machine
Auto-Braking for an Electromagnetic Machine
Dc-Dc Converter in a Non-Steady System
Dc-Dc Converter in a Non-Steady System
Integrated Linear Generator System
Sealing Ring Assemblies Configured for Pressure Locking
Sealing Ring Assemblies Configured for Pressure Locking
Linear Electromagnetic Machine System with Bearing Housings Having Pressurized Gas
Linear Electromagnetic Machine System
Manifold Interface Seal
Springs for Piston Ring Biasing
Anti-Friction Sealing Rings
Application:
63/227,775 →
Systems and Methods for Flexure-Based Bearing Mounting
Application:
63/227,780 →
Piston Sealing Ring Assembly Having a Gap Cover Element
Related Assignments
(25)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Jan 26, 2011
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 025700/0199 →
Assignment of Assignor's Interest
Jun 8, 2011
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 026412/0019 →
Assignment of Assignor's Interest
Jan 4, 2012
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 027480/0272 →
Assignment of Assignor's Interest
Feb 9, 2012
From: SVRCEK, MATT; LAWLER, JOHN; MILLER, SHANNON
To: ETAGEN, INC.
Reel/Frame 027681/0530 →
Assignment of Assignor's Interest
Feb 9, 2012
From: LAWLER, JOHN; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 027681/0545 →
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
Feb 9, 2012
From: LAWLER, JOHN; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 027681/0613 →
Assignment of Assignor's Interest
Apr 10, 2012
From: GADDA, CHRISTOPHER DAVID
To: ETAGEN, INC.
Reel/Frame 028020/0052 →
Assignment of Assignor's Interest
Nov 6, 2013
From: LAWLER, JOHN; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 031557/0417 →
Assignment of Assignor's Interest
Nov 6, 2013
From: SVRCEK, MATT; LAWLER, JOHN
To: ETAGEN, INC.
Reel/Frame 031557/0567 →
Assignment of Assignor's Interest
Nov 6, 2013
From: SVRCEK, MATT; LAWLER, JOHN; MILLER, SHANNON
To: ETAGEN, INC.
Reel/Frame 031557/0627 →
Assignment of Assignor's Interest
Nov 6, 2013
From: LAWLER, JOHN; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 031557/0692 →
Assignment of Assignor's Interest
Nov 6, 2013
From: GADDA, CHRISTOPHER DAVID
To: ETAGEN, INC.
Reel/Frame 031557/0773 →
Assignment of Assignor's Interest
Oct 14, 2016
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 040022/0976 →
Assignment of Assignor's Interest
Jun 18, 2018
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 046120/0988 →
Nunc Pro Tunc Assignment
Nov 8, 2018
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 047454/0509 →
Nunc Pro Tunc Assignment
Nov 8, 2018
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 047454/0437 →
Nunc Pro Tunc Assignment
Nov 8, 2018
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 047454/0462 →
Nunc Pro Tunc Assignment
Nov 8, 2018
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 047454/0486 →
Nunc Pro Tunc Assignment
Nov 8, 2018
From: SIMPSON, ADAM; MILLER, SHANNON; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 047454/0408 →
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 →
Assignment of Assignor's Interest
Jun 16, 2022
From: LAWLER, JOHN; SVRCEK, MATT
To: ETAGEN, INC.
Reel/Frame 060226/0293 →
Change of Name
Jun 16, 2022
From: ETAGEN, INC.
To: MAINSPRING ENERGY, INC.
Reel/Frame 060450/0970 →
Security Interest
Jun 6, 2025
From: MAINSPRING ENERGY, INC.
To: AVENUE VENTURE OPPORTUNITIES FUND II, L.P., AS AGENT
Reel/Frame 071499/0428 →