IP Verse

Static Field Mass Filter For A Mass Spectrometer

Patent No. EP3901984 (titled "Static Field Mass Filter For A Mass Spectrometer") was filed by Thermo Fisher Scientific Bremen on Mar 19, 2019. The application was issued on Feb 12, 2025.

Patent Summary

A static field mass filter for a mass spectrometer that maintains a constant electric field and contains a magnetic field, providing a flat transmission of ions across a selected mass-to-charge ratio range and minimizing unpredictable mass fractionations. The filter comprises two Wien filters with an inversion lens positioned between them, and a diaphragm with a specific aperture that separates ions based on their mass-to-charge ratio. The electric field is maintained at a constant level, while the magnetic field is adjusted to select ions of different masses. This design enables precise isotope ratio analysis with minimal systematic errors, particularly when combined with a reaction cell.

Patent Family

Patent family tree
Statuses, jurisdictions and citation links are shared on request.

Patent Oppositions

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.

CompanyOpposition DateRepresentative
NU INSTRUMENTSNov 11, 2025MEWBURN ELLIS

Dossier Documents

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

EP3901984

THERMO FISHER SCIENTIFIC BREMEN
Application Number
EP21172424A
Filing Date
Mar 19, 2019
Status
Granted And Under Opposition
Jan 10, 2025
Publication Date
Feb 12, 2025
External Links
Slate, Register , Google Patents