Patent ID: 6953148

Claim:
A bag comprising: an upper chamber defining an upper chamber interior volume, the upper chamber comprising: an inlet end of the upper chamber defining an inlet opening; and a bottom end of the upper chamber opposite the inlet end of the upper chamber; a lower chamber defining a lower chamber interior volume less than the upper chamber interior volume, the lower chamber comprising: a top end of the lower chamber; and a bottom end of the lower chamber opposite the top of the lower chamber; and a strainer between the bottom end of the upper chamber and the top end of the lower chamber placing the upper chamber interior volume fluid communication with the lower chamber interior volume; wherein: a chamber selected from the upper and lower chambers defines an outlet port; and the bag further comprises a filter patch attached to the selected chamber and covering the outlet port; and the filter patch is adapted to entrap airborne particles having a diameter of one micron or greater carried by air passing from the selected chamber interior volume through the filter patch.