Patent No. EP3572052 (titled "Method And Device For Producing Absorbent Article, And Absorbent Article") was filed by Unicharm on Feb 23, 2017. The application was issued on Jul 21, 2021.
A method for manufacturing an absorbent article, such as a disposable diaper, that prevents loss of stretchability in the lateral direction of the absorbent core. The method involves arranging elastic members in a stretched state between facing surfaces of a first sheet-like member, and forming joining portions between the elastic members and the first sheet-like member. The joining portions are spaced in both the direction of transport and the cross-direction, preventing the elastic members from contracting into the absorbent core during cutting.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
Get instant alerts for new documents