Flexible neural electrode composite structure and manufacturing and implantation method therefor, and auxiliary implantation assembly

A flexible neural electrode composite structure and a manufacturing and an implantation method therefor, and an auxiliary implantation assembly. The flexible neural electrode composite structure (100) comprises: a plurality of flexible neural electrodes (1), each flexible neural electrode (1) comprising an implant portion (10) and an auxiliary structure (11) provided at the implant portion (10); an auxiliary implantation assembly (2), which comprises a plurality of auxiliary implantation needles (20) corresponding to the plurality of flexible neural electrodes (1) on a one-to-one basis, wherein each auxiliary implantation needle (20) comprises an auxiliary implantation end (201) located at the end close to the flexible neural electrode (1) corresponding thereto, and the auxiliary implantation end (201) is configured to be assembled with the auxiliary structure (11) corresponding thereto; and a fixture (3), which is configured to fix the assembled auxiliary implantation ends (201) and auxiliary structures (11). The auxiliary implantation assembly (2) and the plurality of flexible neural electrodes (1) are fixed together using the fixture (3), such that the plurality of flexible neural electrodes (1) can be implanted into target tissue simultaneously, thereby realizing the implantation of a flexible neural electrode array with a high throughput and a high coverage rate.

The abstract as published by the patent office, from US20250221651A1. It describes the invention; it is not a statement of what is protected.

• Surgical access

  Insertion tools and robots

• Interface and electrodes

  Electrodes and arrays

What the filing appears to be about, read by published rules from its title, abstract and classification codes (A61B2560/0468, A61B2562/046, A61B2562/12, A61B2562/125, A61B5/251). The claims define what a patent protects, and they are not read here.

Surgical access

A probe soft enough for the brain to tolerate is too soft to push in by hand, and each route into the head has its own risk. The problem behind it: placing many contacts exactly, without injuring tissue or vessels, in an operation short and repeatable enough to offer widely.

Interface and electrodes

Everything downstream works with what the contacts pick up. Their number, size and distance from the neurons set the ceiling on the signal. The problem behind it: more contacts, closer to neurons, that still record after years in tissue that reacts to them.

Why the layer matters to the field, not a judgement of this filing. A patent family shows that protection was sought. It does not show that the technology was built, is used in a product, or works in people. The whole stack

One invention, published 8 times in 4 offices. Each publication opens in Espacenet.

• International (PCT)a route to several countries, not a countryWO2023186053A15 Oct 2023
• ChinaCN116919409A24 Oct 2023CN116919409B7 Nov 2025 · grant
• European Patent Officea route to several countries, not a countryEP4501235A15 Feb 2025EP4501235A46 Aug 2025EP4501235B16 May 2026 · grantEP4501235C06 May 2026
• United StatesUS20250221651A110 Jul 2025

1. 2 Apr 2022First filingEarliest priority, at China. The family is counted in this year.
2. 31 Mar 2023ApplicationsFiled at International (PCT), European Patent Office, United States.
3. 5 Oct 2023First publicationWO2023186053A1, International (PCT).
4. 30 Sep 2024Owner recordedUnited States, on US20250221651A1: assignment; owner named: BEIJING BCIFLEX MEDICAL TECHNOLOGY CO., LTD., CHINA.
5. 7 Nov 2025Grant publishedCN116919409B, China.
6. 6 May 2026Grant publishedEP4501235B1, European Patent Office.
7. 22 Sep 2026Office recordEuropean Patent Office, on EP4501235A1: lapsed in a contracting state [announced via postgrant information from national office to epo] (PL).

Dates as the offices published them. Office records are in the offices' own words and are a selection: refusals, lapses and withdrawals, and records that name an owner. Each concerns one member of the family, not the family as a whole, and another member in the same office may stand. Whether a patent is in force today is not assessed.

Organisation

BCIFlex · 24 families identified

• Bibliographic data, family members and office records: European Patent Office, Open Patent Services (the DOCDB and INPADOC databases), read 7 Oct 2026.
• The record itself, with its claims and description: US20250221651A1 in Espacenet
• Counted as a BCI patent family: classified A61B5/293 (invasive electrodes for brain recording); filed by 北京智冉医疗科技有限公司, an organisation already in the graph; describes neural hardware or methods without naming the field. How families are found and judged