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:
Jul. 22, 2025
Filed:
May. 17, 2021
Cytiva Sweden Ab, Uppsala, SE;
Hanno Ehring, Uppsala, SE;
Cytiva Sweden AB, Uppsala, SE;
Abstract
A method and instrument for determining optical density of a solution is disclosed. A flow cellhaving at least three light paths () is provided (), wherein each light path has a respective predetermined path length, l. Absorbance readings are taken (), A, of the solution at the at least three light paths (). For each pair of light paths, a slope, αc, is calculated () by dividing a difference in absorbance reading, ΔA, with a difference in path length, Δl. The calculated slopes, αc, are compared (), and a) if the calculated slopes, αc, are the same, the slope is used for determining () optical density of the solution, or b) if the calculated slopes, αc, are not the same, the steepest slope of the calculated slopes is used for determining () optical density of the solution, or the slope of the calculated slopes being in the range of an absorbance reading of 0.01 to 2 is used for determining () optical density of the solution.