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US 4,983,434 AGranted
Filter laminates
AssigneeW. L. Gore & Associates, Inc.
InventorRobert L. Sassa
Life of this patent
Estimating the term…
Abstract
An expanded porous polytetrafluoroethylene (PTFE) membrane is employed in laminar conjunction with an polytetrafluoroethylene felt; in which the felt is reinforced with a woven scrim.
Claims10
A laminate comprising:
- (a) an expanded porous polytetrafluoroethylene membrane having an air permeability of at least 0.01 cubic feet per square foot at 0.5 inch water gauge;
- (b) a felt comprising a web of polytetrafluoroethylene staple fiber supported by a woven scrim of polytetrafluoroethylene.
Dependencies are inferred from the claim text.