Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7422686 | Cellulose hydrate ultrafiltration membranes and method for their production There is disclosed a process for the production of cellulose hydrate ultrafiltration membranes having improved filtration performance and the ultrafiltration membranes produced by the process. ... | 09/09/2008 |
| 7381330 | Cellulose-based microporous membrane There is disclosed a cellulosic microporous filtration membrane with upper and lower porous protective layers with a porous sponge-type intermediate layer between the two protective layers, wherein the sponge-type structure consists of two isotropic regions having d... | 06/03/2008 |
| 7153426 | Charged filtration membranes and uses therefor The invention relates to charged filtration membranes and their use for separation of a protein from solvent, low molecular weight solutes or a mixture of proteins. Modification of the membranes to generate charge includes modification of membrane pores to alter cha... | 12/26/2006 |
| 6632366 | Cellulose compound hollow fiber membrane The present invention relates to a cellulose compound hollow fiber membrane having high mechanical strength and is hardly degraded by microorganisms, wherein a cellulose compound is comprised as a membrane material, the thickness of the membrane is 50 to ... | 10/14/2003 |
| 6558546 | pH dependent membrane diffusion A pore plugging material, for pH dependent membrane diffusion, in which cyclic olefins having phosphazene-functional moieties provide predictable erosion properties when used to plug pores in separation barriers and other porous membranes. Specific proper... | 05/06/2003 |
| 6372136 | Cellulose acetate semipermeable membrane and process for producing the cellulose acetate semipermeable membrane To provide a cellulose acetate semipermeable membrane having a high filtration rate and high mechanical strength and which is hardly degraded by microorganisms, the present invention provides a cellulose acetate semipermeable membrane containing a cellulo... | 04/16/2002 |
| 6358754 | (Bio)chemical reagent solid phases, process for their production and their applications Novel solid phase reaction supports are disclosed. The solid phase reaction supports include (a) a solid phase carrier having a multiplicity of NH2 functional groups; (b) a coupling compound covalently bonded to an NH2 group of the solid ... | 03/19/2002 |
| 6350621 | (Bio)chemical reagent solid phases, process for their production and their applications Novel solid phase reaction supports are disclosed. The solid phase reaction supports include (a) a solid phase carrier having a multiplicity of NH2 functional groups of the Formula (I): ##STR1## in which R1 and R2 are each... | 02/26/2002 |
| 6139742 | Membrane-based sorbent for heavy metal sequestration A process is provided for making membrane-based sorbents with enhanced binding activity that are particularly useful for heavy metal sequestration. The process includes the step of selectively hydrolyzing a polyacetylated membrane in order to deacetylated... | 10/31/2000 |
| 6013182 | Selectively permeable hollow fiber membrane and process for producing same A selectively permeable hollow fiber membrane for blood dialysis consisting substantially of a cellulose derivative, which has at least a dense layer on the innermost side and a porous layer of greater void percentage on the outside, and a process for pro... | 01/11/2000 |
| 5976324 | Removal of water from reaction mixtures A process as been found for the removal of water from reaction mixtures of acids or acid anhydrides or of aqueous alkali metal hydroxide solutions with alcohols using vapor permeation/pervaporation at the boiling point of the reaction mixture, which inclu... | 11/02/1999 |
| 5856006 | Tobacco filter material and a method for producing the same A tobacco filter material containing fibers which have a core and a surface layer which surrounds the core, wherein the core comprises a non-esterified cellulose and the surface layer comprises a cellulose ester. The fiber may be (A) a cellulose fiber coa... | 01/05/1999 |
| 5853647 | Process for the stabilization of the properties of cellulosic membranes Properties of cellulosic membranes such as the length and the ultrafiltration rate are stabilized by warmth/humidity conditioning, whereby temperatures in a range of about 30° to 60° C. and relative humidities in a range of about 10 to 60% are suitable.... | 12/29/1998 |
| 5783124 | Cellulose acetate hemodialysis membrane A cellulose acetate membrane composed of a mixture comprising a cellulose triacetate and a cellulose diacetate and having an improved heat stability, which does not substantially show a melting peak of cellulose diacetate but substantially shows a melting... | 07/21/1998 |
| 5624561 | Cellulose acetate hemodialysis membrane A cellulose acetate membrane composed of a mixture comprising a cellulose triacetate and a cellulose diacetate and having an improved heat stability, which does not substantially show a melting peak of cellulose diacetate but substantially shows a melting... | 04/29/1997 |
| 5620790 | Multi-layer microfiltration membrane having an integrated prefiltration layer and method of making same A multi-layer microfiltration membrane having an integrated prefiltration layer. Pursuant to a phase inversion process, several layers are successively poured out onto one another prior to phase separation of a lower layer, with the viscosity for the pour... | 04/15/1997 |
| 5554287 | Cellulose matrix filter material A filter material forming a filter layer consisting substantially exclusively of celluloses and cellulose derivatives. In addition to cellulose acetate fibers, the filter layer contains, in the form of additives, microcrystalline cellulose and microfine c... | 09/10/1996 |
| 5462801 | Filter Tow, method for the production thereof, as well as tobacco smoke filter element and method for its production A filter tow from cellulose acetate filaments and/or staple fibers is described on the surface of which an additive from cellulose chain-splitting enzymes is present, at least the surface of the filaments and staple fibers consisting of a cellulose acetat... | 10/31/1995 |
| 5403485 | Dialysis membrane made of cellulose acetate A dialysis membrane in the form of a hollow fiber with a continuous internal cavity is made of cellulose acetate or a cellulose acetate derivative. The hollow fiber is made by using a gas to form the internal hollow cavity. A dialysis membrane in the form... | 04/04/1995 |
| 5387345 | Cellulose acetate membranes A dialysis membrane in the form of a hollow fiber with a continuous internal cavity is made of cellulose acetate or a cellulose acetate derivative. The membrane has a maximum sieving coefficient of 0.04 for albumin with a molecular weight of 68,000. A dia... | 02/07/1995 |
| 5091520 | Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids, process for their preparation, and the use thereof Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids in the form of substantially spherical, partially crystalline particles having an average diameter of 1 to 200 μm and a specific surface area of 10 to 300 m2 | 02/25/1992 |
| 5049259 | Membrane process for drying liquid hydrocarbons This invention relates to a process for drying liquid hydrocarbons using cellulosic membranes.... | 09/17/1991 |
| 4980063 | Compositions useful for preparing cellulose ester membranes for liquid separations This invention consists of a composition useful for preparing a cellulose ester membrane comprising (1) a cellulose ester, (2) glycerol monoacetate, glycerol diacetate, glycerol triacetate, or mixtures thereof, and (3) optionally glycerol, wherein the cel... | 12/25/1990 |
| 4913864 | Process for preparation of porous hollow filament A process for the preparation of a porous hollow filament composed mainly of an organic polymer, which comprises separately feeding a powder of the organic polymer and a liquid additive to a feed zone of twin-screw extruder, mixing the polymer with the ad... | 04/03/1990 |
| 4883593 | Ultrathin-skinned asymmetric membranes by immiscible solvents treatment Improved semipermeable asymmetric fluid separation membranes useful in gas, vapor and liquid separations are disclosed. The membranes are prepared by substantially filling the pores of asymmetric cellulosic semipermeable membranes having a finely porous l... | 11/28/1989 |
| 4810384 | Hydrophilic PVDF semipermeable membrane Hydrophilic semipermeable membranes which retain their capacity for filtration, even after drying, and which are well adapted for either ultrafiltration or microfiltration, are comprised of at least 70% by weight of polyvinylidene fluoride (PVFD) and up t... | 03/07/1989 |
| 4808312 | Cellulose ester hollow fiber membrane for plasma separation A hollow fiber membrane made of a cellulose ester having a membrane thickness of not more than 75 μm, and having void volume (x, % by volume) of the membrane and a rate of ultrafiltration (y, ml/m2.hr.mmHg) satisfying the following formula: wh... | 02/28/1989 |
| 4681713 | Method of making a hollow fiber membrane for dialysis A hollow fiber membrane of a cellulose ester for dialysis of body liquids, such as blood, and a method are described. The membrane, which has a membrane thickness of less than 20μ, and a yield strength Sb (g/filament) after heat-treatment at 8... | 07/21/1987 |
| 4627850 | Osmotic capsule An osmotic capsule is disclosed for delivering a beneficial agent formulation to an environment of use. The osmotic capsule comprises an outer semipermeable wall surrounding and laminating an inner capsule wall formed of a different polymeric composition ... | 12/09/1986 |
| 4587168 | Hollow fiber membrane for dialysis A hollow fiber membrane of a cellulose ester for dialysis which has a membrane thickness of less than 20μ, and a yield strength Sb (g/filament) after heat-treatment at 80° C. for 20 hours satisfying the following formula (I): wherein Sa | 05/06/1986 |
| 4543221 | Method for making cellulose semipermeable hollow fibers Improved cellulose semipermeable hollow fibers useful in detoxifying blood during hemodialysis or hemofiltration treatments. The cellulose fibers are fine, capillary fibers that are made by melt extrusion of certain cellulose ester polyol melt spin compos... | 09/24/1985 |
| 4428776 | Cellulosic semipermeable membranes containing silicon compounds Semipermeable membranes prepared from at least one cellulosic polymer, such as cellulose triacetate, and containing at least one silicon compound, such as tetraethoxy silane, are useful for the separation of various gaseous mixtures into their constituent... | 01/31/1984 |
| 4340481 | Membrane filtration type hollow fibers The invention concerns a membrane filtration type hollow fiber. It is composed of a single material phase which material is a chain high polymer and capable of forming fibers by the spinning of the high polymer. The cylindrical wall defining the hollow fi... | 07/20/1982 |
| 4276173 | Cellulose acetate hollow fiber and method for making same An improved cellulose acetate semi-permeable hollow fiber suitable for use in artificial kidneys and a process for making same.... | 06/30/1981 |
| 4253963 | Asymmetrical ultrafiltration membrane on the basis of cellulose triacetate An asymmetrical ultrafiltration membrane based on cellulose triacetate, optionally substituted by up to 30% cellulose diacetate, is made wettable without tendency to embrittlement or shrinkage by adding hydrophobic synthetic silicic acid to the casting so... | 03/03/1981 |
| 4234431 | Membrane filtration type hollow fibers and method for the preparation of same The invention concerns a membrane filtration type hollow fiber. It is composed of a single material phase which material is a chain high polymer such as cellulose acetate and capable of forming fibers by the spinning of the high polymer. The cylindrical w... | 11/18/1980 |
| 4234528 | Asymmetrical ultrafiltration membrane based on cellulose hydrate An asymmetrical ultrafiltration membrane based on cellulose hydrate which may be dried without destructive shrinkage and which has been saponified without reduction in flow-through or separation performance is prepared by adding hydrophobic synthetic sili... | 11/18/1980 |
| 4176070 | Semi-permeable membranes of regenerated cuprammonium cellulose and method for heat sterilization thereof in physiological saline Semi-permeable membranes of regenerated cellulose are subjected to wet-heat sterilization at a temperature of 105° to 140° C. During the treatment, the membranes are maintained in contact with an aqueous medium such as water or physiological saline. For... | 11/27/1979 |
| 4158683 | Process for obtaining films and blocks of cellulose acetate particularly for rapid and preparative analytical electrophoresis and for immuno-techniques An improved process for preparing films and blocks consisting essentially of cellulose diacetate aqueous gel, which are suitable for electrophoresis purposes, which process comprises dissolving cellulose diacetate in a first mixture of a major proportion ... | 06/19/1979 |
| 4145295 | Cellulose ester ultra-filtration membranes and their manufacture A process for preparing ultra-filtration membranes and the product thereof, in which a selected cellulosic-ester polymer solution is cast into a thin film, at about ambient temperature, partially dried and immersed in a gelation bath at -20 ° to +30° C.... | 03/20/1979 |
