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:
Aug. 04, 1992
Filed:
Jul. 25, 1989
Richard C Ebersole, Wilmington, DE (US);
Robert P Foss, Hockessin, DE (US);
Michael D Ward, Newark, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention relates to a piezoelectric biosensor device and also to a method and a system utilizing a piezoelectric biosensor device for detecting metabolic growth requirements, antibiotic responses, and the specific bacterial products of microorganisms. When a microorganism is grown in an appropriate nutrient medium containing a metabolic product responsive polymer, metabolic products of the organism acidify the medium and precipitate a polymer metabolic product complex which deposits or accumulates on the surface of a piezoelectric biosensor device. The mass change on the surface of the device resulting from this deposit produces a change in the resonant frequency of the piezoelectric biosensor device which can be used to determine the growth and type of microorganism.