The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1997
Filed:
Nov. 06, 1995
Applicant:
Inventors:
Ralph D Zingle, Philadelphia, PA (US);
Nelson A George, North East, MD (US);
Assignee:
W. L. Gore & Associates, Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F26B / ;
U.S. Cl.
CPC ...
34296 ; 34242 ; 220404 ;
Abstract
An vented vial stopper for use in processing freeze-dried products is provided. The stopper includes a vent passageway that is covered with a waterproof and moisture vapor permeable membrane to allow the venting of moisture during the freeze-drying process. The membrane also extends to cover most or all of the exposed surface of the stopper to protect the stopper from chemical attack during processing.