Patent application number | Description | Published |
20120080378 | Thin film composite membranes for forward osmosis, and their preparation methods - Forward osmosis membranes having a hydrophilic support layer and a polyamide rejection layer in a thin film composite membrane are considered. Preferred support layer materials include aramid polymers and PVDF. A woven or non-woven mesh can be incorporated into the support layer to improve handling properties of the membrane. Flat sheet and hollow fiber configurations are possible. Antifouling techniques are provided. The polyamide layer can be formed on the hydrophilic support layer by interfacial polymerization. Applications include forward osmosis and pressure retarded osmosis applications, such as industrial product and/or waste concentration, hydration bags, energy/pressure generation, and controlled delivery of chemicals (e.g., for pharmaceutical applications). | 04-05-2012 |
20120241371 | Membranes having aligned 1-D nanoparticles in a matrix layer for improved fluid separation - Membranes for fluid separation are disclosed. These membranes have a matrix layer sandwiched between an active layer and a porous support layer. The matrix layer includes 1-D nanoparticles that are vertically aligned in a porous polymer matrix, and which substantially extend through the matrix layer. The active layer provides species-specific transport, while the support layer provides mechanical support. A matrix layer of this type has favorable surface morphology for forming the active layer. Furthermore, the pores that form in the matrix layer tend to be smaller and more evenly distributed as a result of the presence of aligned 1-D nanoparticles. Improved performance of separation membranes of this type is attributed to these effects. | 09-27-2012 |
20130095241 | Preparation of aligned nanotube membranes for water and gas separation applications - Fabrication methods for selective membranes that include aligned nanotubes can advantageously include a mechanical polishing step. The nanotubes have their ends closed off during the step of infiltrating a polymer precursor around the nanotubes. This prevents polymer precursor from flowing into the nanotubes. The polishing step is performed after the polymer matrix is formed, and can open up the ends of the nanotubes. | 04-18-2013 |
Patent application number | Description | Published |
20080287564 | Low-Viscosity, Radiation-Curable Formulation for Producing Adaptive Earpieces - The invention relates to a biocompatible, low-viscosity, radiation-curable formulation for producing medical products, in particular adaptive ear pieces, otoplastic parts, shells or ear parts, by means of PNP methods or stereolithographic methods. Said formulation comprises: a) 15-60 wt. % of a monomeric or oligomeric dimethacrylate based on bisphenol A or bisphenol F; b) 0-50 wt. % one or more monomeric or oligomeric urethane (meth)acrylates with a functionality n<4, a viscosity <30 Pa s and a molecular weight <3500; c) 2-25 wt. % of a monomeric, aliphatic or cycloaliphatic dimethacrylate with a viscosity <3 Pa s; d) 2-35 wt. % of an iminooxadiazone dion derivative, characterised by 3 methacrylate and/or acrylate functions; 0-15 wt. % one or more monofunctional methacrylates; f) 0.5-6 wt. % of a photo initiator or a combination of photo initiators, whose absorption lies in the wavelength range of the laser beam that is used or the irradiation source; g) 0-0.5 wt. % one or more anaerobic inhibitors; h) 0-40 wt. % fillers with a particle size <25 μm; i) 0-5 wt. % colorants; j) 0-5 wt. % conventional additives such as UV stabilisers or process additives, whereby the sum of the fraction of the components a) to j) totals 100 wt. %. | 11-20-2008 |
20100310698 | DEVICE AND METHOD FOR THE GENERATIVE PRODUCTION OF THREE-DIMENSIONAL OBJECTS ON THE BASIS OF A MULTIPHASE SYSTEM - The invention relates to a device and to a method for the production of a three-dimensional object by the consecutive layered bonding of a material that can be bonded by means of electromagnetic radiation, wherein in the so-called vat an at least n-phase system, where n>2, is present, of which at least one phase comprises the building material and at least one other a phase that cannot be mixed with the building material. | 12-09-2010 |
20100316972 | METHOD FOR THE GENERATIVE PRODUCTION OF INDIVIDUAL DENTAL PREFORMED PARTS FOR ARTICULATORS - Method for the production of a denture comprising the following steps:—collection of the biometric data of a patient, namely, the toothed or untoothed mandible and maxilla, the sizing of the jaws, the spatial position thereof relative to the skull, the condyle inclination and the movement of the mandible, and the recording of the mandible movement;—implementation of the data in a virtual articulator which is made available in the main memory of the data processing equipment;—CAD construction of the individual articulator preformed parts and dental molded bodies based on the collected patient data;—production of the individual articulator molded bodies and dental molded bodies by means of a generative manufacturing process based on the recorded biometric data;—incorporation of the individual articulator preformed parts and/or dental molded bodies into a standardized articulator housing, or complete generative manufacture of the articulator with individualized molded bodies. | 12-16-2010 |
20120237903 | DENTAL MODEL - A dental modal for making a dental prosthesis has a base body formed with model teeth and model gingiva and with a cutout in an edentate area and with a hole in a floor of the cutout. A plate is releasably fittable complementarily in the cutout and is formed with a hole aligned with the hole of the cutout. A gingiva mask is fittable on the plate in the cutout and is in turn formed with a hole aligned with the holes of the plate and of the cutout. A model implant insert is releasably fittable in the holes of the mask, plate, and cutout and carries a model implant or an implant-screw mockup. | 09-20-2012 |