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. 29, 1993
Filed:
Nov. 29, 1988
William E Foltz, Cottage Grove, MN (US);
Richard R Matner, St. Paul, MN (US);
Lewis P Woodson, Eagan, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A unitary sterility indicator and a method for its use, the indicator comprising an outer container having liquid impermeable and gas non-absorptive walls, and having a gas-transmissive, bacteria impermeable opening therein; contained within the outer container, a detectable amount of a source of active enzyme and/or another microorganism commonly used to monitor sterilization; a sealed, openable gas and liquid impermeable inner container containing an aqueous medium and/or a nutrient growth medium, disposed in the outer container; an enzyme substrate system capable of reacting with active enzyme to produce a detectable enzyme-modified product and/or a detector material sensitive to microorganism growth, contained in one of the containers; and means contained within the outer container for restricting the area in which enzyme-modified product and/or growing microorganisms are contained, after the inner container is opened, to an area which is less than the volume of aqueous solution contained in the inner container.