Hermetically sealed petri dish

Claim 1

IN COMBINATION WITH A DISH ADAPTED TO CONTAIN A CULTURE MEDIUM AND BEING GENERALLY IN THE NATURE OF A SHALLOW CYCLINDER, SAID DISH HAVING AN UPPER, CIRCUMFERENTIALLY EXTENDING, COVER-SEALING PERIPHERAL EDGE; A CUPSHAPED COVER ON SAID DISH HAVING THE SAME SHAPE BUT OF A GREATER DIAMETER TO FIT LOOSELY THEREON, SAID COVER INCLUDING A TOP HAVING AN OUTER CIRCUMFERENTIALLY EXTENDING PERIPHERY HAVING INNER SURFACES, A DEPENDING SIDE WALL DEFINING A CORNER WITH SAID TOP EXTENDING LATERALLY AND INTEGRALLY FROM THE OUTER PERIPHERY OF SAID TOP; A PRESSURE-SENSITIVE, PERMANENTLY TACKY ADHESIVE FOR RELEASABLY ATTACHING SAID COVER TO SAID DISH AND HERMETICALLY SEALING THE JUNCTURE BETWEEN SAID DISH AND COVER, SAID ADHESIVE MATERIAL EXTENDING CIRCUMFERENTIALLY ALONG SAID UPPER PERIPHERAL EDGE OF SAID DISH AND CIRCUMFERENTIALLY ALONG SAID INNER SURFACES OF SAID OUTER PERIPHERY OF SAID TOP AT SAID CORNER, SAID ADHESIVE BEING REMOVABLE THEREWITH FROM SAID DISH, AND SAID COVER BEING FORMED FROM FLEXIBLE MATERIAL AND SO CONSTRUCTED AS TO FLEX IN RESPONSE TO LATERAL PRESSURES APPLIED TO SAIOD DEPENDING SIDE WALL AND THUSLY RELEASE THE SEAL PRESENT BETWEEN SAID COVER AND SAID DISH, WITH SAID ADHESIVE CARRIER ENTIRELY BY SAID COVER UPON REMOVAL OF SAID COVER FROM SAID DISH.