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| Number | Title | Issue Date |
| 4687578 | Fluid separation membranes Fluid separation membranes and modules containing the separation membranes are disclosed wherein the membranes have preselected portions having lower selectivity to the feed fluid mixture; thus permitting the fluid feed mixtures to permeate the membranes ... | 08/18/1987 |
| 4686039 | Fluid separation module Fluid separation modules are disclosed having tube sheets positioned in the end portions of the cylindrical shell forming the exterior of the separation module wherein the end portions of the cylindrical shell have been modified in order to provide improv... | 08/11/1987 |
| 4678573 | Fluid separation module A fluid separation module to be mounted in a cylindrical shell and the method of mounting the same, the module including a bundle of hollow fiber membranes and a polymeric tube sheet, the tube sheet being positioned at one end of the bundle of hollow fibe... | 07/07/1987 |
| 4671875 | Fluid separation module A fluid separation module made up of a cylindrical shell having an outlet end and an enlarged inlet end. A bundle of hollow fiber membranes positioned in the shell extend through a cast tube sheet positioned in the enlarged inlet end of the shell. A flexi... | 06/09/1987 |
| 4654055 | Asymmetric gas separation membranes Asymmetric gas separation membranes of materials having selective permeation of at least one gas of a gaseous mixture over that of one or more remaining gases of the gaseous mixture, exhibit significantly improved permeation selectivities for the at least... | 03/31/1987 |
| 4652283 | Polyphenylene oxide membrane having chemically bonded coating A coated membrane for gas separations wherein the membrane is made up of an amine cross-linked poly(phenylene oxide) substrate membrane having about 1 to about 7 weight percent nitrogen and a coating on the substrate membrane. The coating is a polymer con... | 03/24/1987 |
| 4647297 | Benzyl substituted phenylene oxide membrane A gas separation membrane made from a benzyl-substituted polymer of 2,6-dimethyl-1,3-phenylene oxide having the structure ##STR1## wherein the benzyl substituent, X, is selected from the group consisting of ##STR2## where R1 and ... | 03/03/1987 |
| 4646819 | Apparatus for drying air Air drying apparatus wherein input air to be dried is passed through an air tube which contains a smaller refrigerant tube, with precooled air from the air tube being forced by baffles to flow along a tortuous path over the exterior of the air tube. The b... | 03/03/1987 |
| 4597777 | Membrane gas separation processes This invention relates to membrane gas separation of carbon dioxide and methane containing gas mixtures. More particularly the invention relates to apparatus and processes for recovering a methane-enriched non-permeate gas of natural gas pipe line quality... | 07/01/1986 |
| 4530703 | Cross-linked polyarylene oxide membranes Covalently-bonded, cross-linked polymeric gas separation membranes of a polyarylene oxide precursor and a chemical cross-linking agent. Apparatus and processes utilizing such membranes for selectively separating at least one gas from a gaseous mixture by ... | 07/23/1985 |
| 4272414 | Chemical retardants for forest fires Fire retardant compositions comprising (a) ammonium sulfate; (b) a carboxyalkyl or hydroxyalkyl ether of a polygalactomannan; and optionally (c) other fire retardant chemicals from the groups consisting of monoammonium orthophosphate, diammonium orthophos... | 06/09/1981 |
| 4247435 | Intumescent fire retardant coating compositions Improved aqueous intumescent fire retardant coating compositions comprising: (A) a carbonific; (B) a film-forming binder; and (C) a substantially water-insoluble phosphorus-containing material having at least one P-O-P linkage; wherein (A), (B) and (C) constit... | 01/27/1981 |
