Reusable filter unit with recoverable filter membrane
Patent 4678576 Issued on July 7, 1987. Estimated Expiration Date: 
June 7, 2005. 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 7, 2005. 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 1411972 2775350 3085689 3295686 3360128 3361261 3929648 Selective filtration apparatus Patent #: 4055498 InventorAssigneeApplicationNo. 06/715853 filed on 06/07/1985US Classes:210/321.87, Cylindrical membrane210/445, Clamped in casing joint210/450, Gasket within casing or spaced removable end members210/451, Internal fixed shoulder supporting filter element210/453, Filter element clamped between closure and end wallD24/162Filter (37)ExaminersPrimary: Sadowski, David R.Attorney, Agent or FirmInternational ClassesB01D 36/00 (20060101)B01D 61/18 (20060101) B01D 63/08 (20060101) B01D 29/05 (20060101) B01D 29/01 (20060101) AbstractA reusable laboratory filter unit having a recoverable filter member. The unit has an upper body or reservoir for receiving the liquid to be filtered and a lower body or receptacle for receiving filtrate. A plate for supporting the filter membrane is captured between the upper and lower bodies when the bodies are joined together. A threaded ring arrangement draws the bodies together axially without rotating one with respect to the other so the membrane is not subjected to any twisting force. Separation of the bodies exposes the support plate so it can be easily removed to recover the membrane. | |
