Gas-permeable, liquid-tight closure
Porous products and process therefor
Sterility testing vessel
ApplicationNo. 636119 filed on 04/23/1996
US Classes:215/261, Barrier permeable to gas and impermeable to liquid215/308, Communicating through a filter220/371, With filter220/372, Screen220/373With means to prevent escape of contents through vent
ExaminersPrimary: Cronin, Stephen K.
Attorney, Agent or Firm
Foreign Patent References
International ClassB65D 053/00
Foreign Application Priority Data1995-07-19 DE
AbstractA lid is disclosed having a pressure compensation device comprising a gas permeable, liquid impermeable membrane and a surge protection element comprising a gas permeable material which serves to break the surge pressure exerted on the membrane by the container contents. The lid is designed as an injection molded plastic part with the membrane being integrated in an upper cover portion of the lid by injection molding.