Apparatus for preventing cross-contamination of multi-well test plates

• US 5,516,490 A
• Filed: 05/17/1994
• Issued: 05/14/1996
• Est. Priority Date: 04/19/1993
• Status: Expired due to Fees

• Current Assignee: Ashok R. Sanadi, Clyde Ptrs Sanadi, Sanadi Biotech Group, Inc.
• Original Assignee: Sanadi Biotech Group, Inc.
• Inventors: Sanadi, Ashok R.
• Primary Examiner(s): Housel,. James C.
• Assistant Examiner(s): Pyon, Harold Y.
• Application Number:
  US08/243,890
• Time in Patent Office: 728 Days
• Field of Search: 422/58, 422/69, 422/101, 422/102, 422/104, 435/301, 435/311, 436/165, 436/177, 436/178, 436/809
• US Class Current: 422/552
• CPC Class Codes: B01L 3/5025 for parallel transport of multiple samples
• CPC Class Codes: B01L 3/50255 Multi-well filtration
• CPC Class Codes: B01L 3/5085 for multiple samples, e.g. microtitration plates
• CPC Class Codes: B01L 3/50853 with covers or lids
• CPC Class Codes: Y10T 436/25375 Liberation or purification of sample or separation of material from a sample [e.g., filtering, centrifuging, etc.]
• CPC Class Codes: Y10T 436/255 including use of a solid sorbent, semipermeable membrane, or liquid extraction

Abstract

A multi-well plate which prevents cross-contamination of specimens through the use of a resilient gasket which covers a majority of the top of the plate and is compressed by a lid. It thus provides a sealing assembly for arrays of containers of any size or shape. A multi-well plate of modular construction is also disclosed in which resilient gaskets prevent cross-contamination of samples. The gaskets may be unitary sheets with or without an array of openings corresponding to the well openings or may consist of discrete single-cell gaskets. A multi-well plate in which the wells have conical ends is also provided.

Claims

1. An assembly for simultaneously confining multiple samples in separate chambers during thermal equilibration, comprising:

a plate defining a plurality of containment wells, each well having an opening at a principal surface of said plate;

a compressible gasket disposed on and extending over the majority of said principal surface of said plate, said compressible gasket having a plurality of holes in register with said wells; and

a lid disposed on said compressible gasket, said lid having a surface for compressing said compressible gasket on said principal surface of said plate to form a seal and close said wells to define individual closed well chambers, thereby preventing said samples from flowing from one well chamber to another between said lid and said principal surface of said plate during thermal equilibration.

2. The apparatus cited in claim 1, wherein said plate and said containment wells are an array of tubes mounted in a tray.

3. The apparatus recited in claim 1, further comprising a thermal equilibration sheet disposed on said compressible gasket.

4. The apparatus recited in claim 1, wherein said compressible gasket is formed of a material selected from the group consisting of silicone rubber, sodium polysulfide, polychloroprene, and butadiene-styrene copolymers.

5. The apparatus recited in claim 4, further comprising a clamp which clamps said plate, said compressible gasket and said lid together.

6. The apparatus recited in claim 4, wherein said holes of said gasket have diameters less than that of said well openings.