Hydrogen-permeable metal membrane and method for producing the same
Patent 6152995 Issued on November 28, 2000. Estimated Expiration Date: March 22, 2019. 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.
96/4, APPARATUS FOR SELECTIVE DIFFUSION OF GASES (E.G., SEMIPERMEABLE MEMBRANE, ETC.)95/56, Elemental metal or alloy barrier216/46, Masking of sidewall216/53, Nongaseous phase etching216/108Etchant contains acid
A hydrogen-permeable metal membrane with increased hydrogen flux compared to conventional metal membranes is disclosed. Without sacrificing selectivity, the membrane enables a greater throughput of purified hydrogen. A method for preparing the invention includes at least one etching step in which a controlled volume of etchant is used to selectively remove material from the membrane's surface. Methods for repairing holes or other defects in the membrane are also disclosed.
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March 22, 2019. 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.
