US 11575148

Here is a concise summary of US patent 11575148:

Patent Number: US11575148B2

Title: Porous film and lithium-ion battery

Assignee: Ningde Amperex Technology Ltd

Inventors: Jianjian Yi, Xinzhi Zhang, Zengbin WEI, Xinghua Tao

Filing Date: October 1, 2020

Issue Date: February 7, 2023

Abstract: A porous film is disclosed, comprising a binder and inorganic particles. The film contains pores formed by the binder, where these pores include at least a portion of the inorganic particles. The inorganic particles have specific size distributions: Dv10 (particle size at 10% cumulative volume) is between 0.015 μm and 3 μm, Dv50 (particle size at 50% cumulative volume) is between 0.2 μm and 5 μm, and Dv90 (particle size at 90% cumulative volume) is between 1 μm and 10 μm. The particle sizes follow the relationship Dv10 < Dv50 < Dv90, and the ratio of Dv90 to Dv10 is between 2 and 100.

Plain-Language Overview of Independent Claims:
(Note: The provided patent text does not contain numerically listed claims but rather "aspects of the application" in the Summary section, which are interpreted as independent claims for this overview.)

• First Aspect (Porous Film): This claim describes a porous film composed of a binder and inorganic particles. The film has pores created by the binder, and these pores incorporate some of the inorganic particles. A key feature is that the average thickness of the walls between these pores is within a range of 20 nm to 500 nm.
• Second Aspect (Lithium-ion Battery): This claim describes a lithium-ion battery that includes a positive electrode, a negative electrode, a separator positioned between the electrodes, and non-aqueous electrolyte. Crucially, this battery also incorporates the porous film described in the First Aspect.

USPTO Database Status:
The patent US11575148B2 is currently active and is scheduled to expire on April 8, 2039. It was granted on February 7, 2023. This information is derived from the Google Patents listing, which sources from USPTO data. No further detailed search of the USPTO database was performed as this information is readily available and authoritative from the patent record itself.

CAFC 2026 Dockets:
A review of the provided CAFC 2026 scheduled cases for May, June, and July did not reveal any dockets specifically mentioning patent number US11575148. Therefore, no active litigation concerning this patent was found in the provided CAFC docket snippets for 2026.