Philip Rodney KWOK,Lee James VELISS,Robert Edward HENRY
申请号:
US15629115
公开号:
US20170281893A1
申请日:
2017.06.21
申请国别(地区):
US
年份:
2017
代理人:
摘要:
A vent in a patient interface has an air-permeable porous portion having an entry surface and an exit surface. The entry surface is formed of or coated with a hydrophobic material or hydrophilic material. The exit surface is formed of or coated with the other of the hydrophobic material and the hydrophilic material.