High strength hydroentangled nonwoven fabric
Patent 4808467 Issued on February 28, 1989. Estimated Expiration Date: 
September 15, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 15, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTextile fabric and method of manufacturing the same Hydraulically entangled PTFE/glass filter felt Patent #: 4612237 InventorsAssigneeApplicationNo. 07/097157 filed on 09/15/1987US Classes:442/384, Hydroentangled28/104, By fluid jet needling or perforating28/105, Through backing and support members428/421, Of fluorinated addition polymer from unsaturated monomers428/422, Addition polymer is perhalogenated442/385, Including a wood fiber containing layer442/389, Separate nonwoven fabric layers comprise chemically different strand or fiber material442/408, Hydroentangled nonwoven fabric442/416Containing polymeric and natural strand or fiber materialsExaminersPrimary: McCamish, Marion E.Attorney, Agent or FirmInternational ClassesD21H 27/34 (20060101)D04H 13/00 (20060101) D21H 27/30 (20060101) AbstractA strong, absorbent nonwoven fabric containing wood pulp and textile fibers is prepared by hydroentanglement with a continuous filament, base web. The fabric may be apertured or essentially nonapertured and may be made water repellant for use in medical and surgical applications. | |
