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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 5265734 | Silicon-derived solvent stable membranes A composite membrane comprises a substrate made from a polymer selected from copolymers and homopolymers of ethylenically unsaturated nitriles, which substrate has preferably first been treated with a pore protector in absence of curing agents and catalys... | 11/30/1993 |
| 5205934 | Silicone-derived solvent stable membranes A composite membrane which is substantially insoluble (and preferably swells no more than 10%) in acetonitrile, ethanol, hexane, toluene, N-methylpyrrolidone, dimethylsulfoxide, dimethylformamide, dimethylacetamide, and their mixtures with each other and/... | 04/27/1993 |
| 5151182 | Polyphenylene oxide-derived membranes for separation in organic solvents Composite solvent stable membranes for treating organic liquids comprise a crosslinked layer of less than 5 microns in thickness supported on a solvent stable porous membrane substrate, which layer includes at least one polymer selected from polyphenylene... | 09/29/1992 |
| 5057197 | Process and apparatus for the removal of undesired components from aqueous feedstocks An efficient process and system for the removal of at least one organic acid from aqueous feed streams.... | 10/15/1991 |
| 4761233 | Novel membranes and process for making them A process for preparing a microporous membrane, which comprises casting the membrane from a solution comprising a mixture of at least one pore-forming polymer and at least one film-forming polymer, and a solvent for the mixture of polymers, wherein the at... | 08/02/1988 |
