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ReexaminationNew EnergyBattery Materials

Battery Electrode Binder Patent Granted Following Reexamination

Reexamination support for technology involving electrode binders, negative-electrode sheets, and lithium-ion battery applications.

Matter Overview

The matter involved a binder technology for lithium-ion battery negative electrodes, including material composition, electrode preparation, and resulting battery performance. Following rejection, our team was engaged to develop the reexamination strategy.

Client Objective

The client sought patent protection for the binder composition and its coordinated effect on electrode structure, mechanical stability, and electrochemical performance.

Key Patent Issues

Distinguishing the Binder Composition
Clarify the material features that differentiated the claimed binder from known battery binders.
Linking Composition to Electrode Performance
Demonstrate how the distinguishing composition affected adhesion, structural stability, and battery performance.
Addressing Obviousness Reasoning
Challenge whether the cited references provided a genuine motivation to arrive at the claimed solution.

Our Approach

Rejection Analysis

Reviewed the cited battery-material references and the examiner’s inventive-step reasoning.

Composition & Effect Mapping

Mapped the binder components and parameters to their effects on the negative-electrode sheet.

Claim Strategy Refinement

Adjusted and clarified the claims while preserving protection for commercially relevant embodiments.

Reexamination Submission

Prepared the technical and legal arguments and managed the reexamination proceeding.

Outcome

Patent Granted Following Reexamination

The rejection was overcome, and the patent was granted, providing protection for the client’s lithium-ion battery electrode-binder technology.

Practical Takeaways

Tie Composition to Battery Performance
For battery materials, claim features should be connected to electrode and cell-level performance.
Address Combination Motivation
Reexamination should examine whether the cited references genuinely suggested the claimed material combination.
Preserve Application-Level Protection
Claims should cover the binder, electrode sheet, and relevant battery applications where supported.

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