Melt-spun ceramic fiber filter and method
Patent 6860917 Issued on March 1, 2005. Estimated Expiration Date: 
December 3, 2022. 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.
December 3, 2022. 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 3308853 3595245 3615995 3650866 3676242 3684415 3715251 3755527 3849241 Melt blowing process InventorsAssigneeApplicationNo. 10308586 filed on 12/03/2002US Classes:55/523, Ceramic or sintered55/521, ZIGZAG, CORRUGATED, OR CONICAL264/5, FORMATION OF SOLID PARTICULATE MATERIAL DIRECTLY FROM MOLTEN OR LIQUID MASS (E.G., LIQUID COMMINUTING)264/112, Stratified or layered articles264/113, Plural layers formed by uniting randomly associated particles264/165, FORMING CONTINUOUS OR INDEFINITE LENGTH WORK264/624, Using organometallic or organosilicon intermediate264/628, Producing microporous article (e.g., filter, etc.)156/62.8To similarly formed battExaminersPrimary: Smith, Duane S.Assistant: Greene, Jason M. Attorney, Agent or FirmInternational ClassB01D039/20AbstractA method for making high temperature filter media is provided by melt-spinning a plurality of fibers of preceramic thermoplastic polymer to form a nonwoven textile web of the fibers, curing and cross-linking the thermoplastic polymer to a thermoset polymer, and thermally decomposing the thermoset polymer to ceramic. Between the melt-spinning step and the curing step, the web is formed to a filter pre-form in a green state while still pliable and malleable. The filter pre-form is cured without re-melting the thermoplastic polymer and without destroying morphology.Field of SearchPlies or layers of different characteristics or orientationDiffering mesh sizes SPIRAL FILTER MEDIA ZIGZAG, CORRUGATED, OR CONICAL Ceramic or sintered CERAMIC COMPOSITIONS Carbide or oxycarbide containing Silicon carbide And different carbide And boride, silicide, nitride, or oxynitride Refractory Boron nitride containing Silicon nitride containing (Si3N4) FORMATION OF SOLID PARTICULATE MATERIAL DIRECTLY FROM MOLTEN OR LIQUID MASS (E.G., LIQUID COMMINUTING) With subsequent uniting of the particles Utilizing centrifugal force or rotating forming zone Stratified or layered articles Plural layers formed by uniting randomly associated particles FORMING CONTINUOUS OR INDEFINITE LENGTH WORK Using organometallic or organosilicon intermediate Forming carbide or carbonitride containing product Forming nitride or oxynitride containing product Forming fiber Producing microporous article (e.g., filter, etc.) Producing silicon carbide containing product To similarly formed batt | |
