Blood filter
Patent 4170056 Issued on October 9, 1979. Estimated Expiration Date: 
June 6, 1997. 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.
June 6, 1997. 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 References 2341414 3003643 3158532 3253715 3327859 3593854 3737036 3765536 Device for removing blood microemboli Patent #: 3935111 InventorsAssigneeApplicationNo. 05/803696 filed on 06/06/1977US Classes:29/896.62, Filter210/446, Axially aligned inlet and outlet604/406, Filter or series thereof for liquid entering or leaving containerD24/162Filter (37)ExaminersPrimary: Lanham, C.W.Assistant: Gurley, D. M. Attorney, Agent or FirmInternational ClassesB29C 65/08 (20060101)A61M 5/165 (20060101) B01D 29/00 (20060101) AbstractA filter for blood and the like including a housing defining an inlet for fluids to be filtered, and an outlet for filtered fluid, plus a stack of filter pads of thermoplastic fibers positioned within the housing. According to one aspect of this invention, the stack of pads is joined together at their periphery by a heat seal to form an integral filter unit, while, typically, the stack is joined to the housing at such periphery by a second seal. In another aspect of this invention, the fluid inlet is positioned adjacent a first pad of the stack and the fluid outlet is adjacent a last pad of the stack, the diameter of the fibers of the last pad being smaller than the diameter of the fibers of the first pad, typically with the fiber diameter of intermediate pads generally decreasing from pad to pad in the direction of the last pad. | |
