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Desiccant-containing stopper

  • US 6,247,604 B1
  • Filed: 01/20/1999
  • Issued: 06/19/2001
  • Est. Priority Date: 03/17/1994
  • Status: Expired due to Fees
First Claim
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1. A closure capable of sealing engagement with the mouth opening of a vessel, the closure comprising a closure wall having a puncturable region therein in communication with the interior of the vessel on which the closure is in place, and having on an inwardly facing region of the closure wall a desiccant material covered with a semi-permeable membrane which permits transmission of water vapor therethrough but is substantially impermeable to liquid water.

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