The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2020
Filed:
Oct. 24, 2018
Thermo Finnigan Llc, San Jose, CA (US);
Harald Oser, San Carlos, CA (US);
Qingyu Song, Fremont, CA (US);
Mikhail V. Ugarov, San Jose, CA (US);
Thermo Finnigan LLC, San Jose, CA (US);
Abstract
A method of operating a quadrupole mass filter is disclosed. A first set of RF and resolving DC voltages are applied to electrodes of a quadrupole mass filter to selectively transmit first ions having a first mass-to-charge ratio (m/z). A second set of RF and resolving DC voltages are applied to electrodes of the quadrupole mass filter to selectively transmit second ions having a second m/z. Detection of the second ions is initiated after completion of a settling time. The settling time is determined in accordance with the relationship: Eq. 1, where tis the settling time, (m/z)is the first mass-to-charge ratio, (m/z)is the second mass-to-charge ratio and A, B and C are empirically derived coefficients.