Plural stage filter cartridge wherein at least one stage comprises pulverized particulate material
Patent 4032457 Issued on June 28, 1977. Estimated Expiration Date: 
June 28, 1994. 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 28, 1994. 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 327646 2539768 2802405 3158571 3209916 3261473 3384241 3434599 InventorAssigneeApplicationNo. 05/583749 filed on 06/04/1975US Classes:210/489, For series flow210/492, Alternating dissimilar210/497.01, Cylindrical, conical, or trough shape210/501, Sterilizing or neutralizing agent containing210/502.1, Sorptive component containing210/505, Including fibers210/509, Inorganic55/487, Differing mesh sizes96/139Including baffle for modifying gas flow (e.g., flow vanes, diffuser, etc.)ExaminersPrimary: Lutter, Frank W.Assistant: Sever, Frank AbstractA multiple phase filter cartridge is presented wherein the filter has two or more distinctly different fibrous layers with at least one of the fibrous layers containing active particles. The different layers are formed in place on the filter by a wet accretion process.Field of SearchRemovable cartridge or hand-manipulated containerSpaced filters Diverse granular or fibrous One within another Central internal liquid receiver, e.g., tube Axially aligned inlet and outlet Integral or coated layers All fibrous Alternating dissimilar With central pervious tubular receiver Supported, shaped or superimposed formed mediums With adhered coating or impregnant Including fibers Sterilizing or neutralizing agent containing Coated or impregnated, e.g., adhesively bound Fibrous | |
