Petri dish

• US 3,158,553 A
• Filed: 12/29/1961
• Issued: 11/24/1964
• Est. Priority Date: 12/29/1961
• Status: Expired due to Term

• Current Assignee: Theodore J. Carski
• Original Assignee: Theodore J. Carski
• Inventors: Carski, Theodore J.
• Application Number:
  US04/163,249
• Time in Patent Office: 1,061 Days
• US Class Current: 435/305.4
• CPC Class Codes: C12M 23/10 Petri dish crystallising dishes B01L3/06
• CPC Class Codes: C12M 23/38 Caps; Covers; Plugs; Pouring means
• CPC Class Codes: C12M 23/46 Means for fastening
• CPC Class Codes: C12M 23/50 Means for positioning or orientating the apparatus C12M41/08 takes precedence
• CPC Class Codes: Y10S 435/801 Anerobic cultivation

Claims

1. A PETRI DISH CAPABLE OF BEING READILY USED AS A SEALED UNIT AND AS AN OPEN UNIT DURING INCUBATION, SAID DISH INCLUDING A BASE AND RIM EXTENDING UPWARDLY THEREFROM, SAID BASE AD RIM DEFINING A SHALLOW CYLINDER, SAID RIM HAVING AN UPPER CIRCUMFERENTIALLY EXTENDING, COVER-SEALING PERIPHERAL EDGE;

A CUP-SHAPED COVER 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;

AND FURTHER ELEVATION MEANS BEING DISPOSED BETWEEN SAID RIM AND SAID SIDE WALL AND BEING PROVIDED BY SURFACES THEREOF FOR PERMITTING SAID COVER TO BE ELEVATED WITH RESPECT TO THE RIM EDGE AND RELOCATED IN A SPACED RELATIONSHIP WITH RESPECT THERETO, SAID ELEVATION MEANS INCLUDING A PLURALITY OF SPACED NIBS AND A CORRESPONDING NUMBER OF NIB RECEIVING BODIES HAVING SURFACES INCLINED TO THE HORIZONTAL SUCH THAT UPON RELATIVE ROTATION OF SAID DISH AND COVER SAID NIBS ARE ADAPTED TO RIDE IN CONTACT WITH SAID INCLINED SURFACES TO ELEVATE SAID COVER WITH RESPECT TO THE RIM EDGE AND RELATIVE ROTATION OF SAID DISH AND COVER IN THE REVERSE DIRECTION WILL LOWER SAID COVER ON TO SAID DISH WITH THE RIM EDGE ADAPTED TO SEAL WITH SURFACES OF THE TOP OF SAID COVER.