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:
Mar. 07, 1989
Filed:
Sep. 22, 1987
Applicant:
Inventors:
Douglas B Kell, Cwmsymlog, SY23 3HR, GB;
Robert W Todd, Bryncaemeilir, SY20 80G, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12M / ; C12M / ; G01R / ;
U.S. Cl.
CPC ...
435291 ; 435286 ; 435284 ; 324 / ; 324 / ;
Abstract
Apparatus for the determination of biomass in a suspension and its use in a fermentation apparatus. The apparatus includes electrodes to be placed in the suspension and the following other components: circuit for applying an alternating voltage between the electrodes; circuit for providing a current signal indicative of the current in the current electrode circuit; circuit for providing a voltage signal indicative of the voltage between the ratio between the value of the voltage signal and the value of a quadrature component of the current signal, or vice versa, to provide a capacitance dependent signal.