Visualization device

• US 4,824,230 A
• Filed: 12/13/1985
• Issued: 04/25/1989
• Est. Priority Date: 12/13/1985
• Status: Expired due to Term

• Current Assignee: NEN Life Science Products Inc (Revvity, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Litt, Gerald J.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Callaghan, Terry S.
• Application Number:
  US06/808,461
• Time in Patent Office: 1,229 Days
• Field of Search: 422/65, 422/73, 206/438, 356/244, 356/397, 356/436, 356/440, 435/299, 435/300, 435/301, 350/534, 350/535, 350/536, 350/321
• US Class Current: 359/896
• CPC Class Codes: B01L 3/5085 for multiple samples, e.g. microtitration plates
• CPC Class Codes: G02B 21/34 Microscope slides, e.g. mounting specimens on microscope slides

Abstract

Apparatus for indicating the presence of a liquid on a member includes a substrate having a pattern thereon that is perceptibly visually modified by the presence of a liquid on the member.

Claims

1. Apparatus for determining the presence of a liquid on a microtiter plate, the apparatus comprising a substrate having a pattern thereon, the pattern having contrasting first and second areas, the substrate being positioned below the microtiter plate so that at least a portion of a first and second contrasting area is visible through the microtiter plate and so that light reflected from the portion of the pattern visible through the plate is passed through the microtiter plate, the visual perception of the contrasting areas of the pattern observable by an observer being modified by the presence of liquid on the microtiter plate, thereby providing a visually perceptible indication of the liquid.