Patent application number | Description | Published |
20140219305 | SEMICONDUCTOR LASERS AND ETCHED-FACET INTEGRATED DEVICES HAVING H-SHAPED WINDOWS - An edge-emitting optical semiconductor structure has a substrate, an active multiple quantum well (MQW) region formed on the substrate, and a ridge waveguide extending between first and second etched end facets. The first etched end facet is disposed in a first window, while the second etched end facet is disposed in a second window. The first etched end facet extends between a pair of alcoves in the first window, and the second etched end facet extends between a pair of alcoves in the second window. An integrated device in which two such structures are provided has an H-shaped window where the two structures adjoin each other. The structure can be fabricated using a process that involves a first mask to form the ridge waveguide and then a second mask and an etching process to form the windows. | 08-07-2014 |
20140233596 | SEMICONDUCTOR LASERS AND ETCHED-FACET INTEGRATED DEVICES HAVING NON-UNIFORM TRENCHES - An edge-emitting etched-facet optical semiconductor structure includes a substrate, an active multiple quantum well (MQW) region formed on the substrate, a ridge waveguide formed over the MQW region extending in substantially a longitudinal direction between a waveguide first etched end facet disposed in a first window and a waveguide second etched end facet disposed in a second window, and first and second trenches having non-uniform widths extending in substantially the longitudinal direction between the first and second windows. | 08-21-2014 |
20140239250 | ETCHED-FACET LASERS HAVING WINDOWS WITH SINGLE-LAYER OPTICAL COATINGS - An edge-emitting etched-facet optical semiconductor structure has a substrate, an active multiple quantum well (MQW) region formed on the substrate, and a ridge waveguide formed over the MQW region extending in substantially a longitudinal direction between a waveguide first etched end facet and a waveguide second etched end facet. A mask layer used to form windows in which the etched end facets are disposed consists of a single dielectric material disposed directly on the ridge waveguide. An optical coating consisting of no more than one layer of the same dielectric material of which the second mask is made is disposed directly on the second mask and disposed directly on the windows to coat the etched end facets. | 08-28-2014 |
Patent application number | Description | Published |
20090197832 | POLYMER MIXTURES OF ANIONIC AND CATIONIC POLYSACCHARIDES AND USE THEREOF - Described in the present application are compositions comprising mixtures of polyanionic polysaccharides and polycationic polysaccharides consisting of oligosaccharide derivatives of chitosan. In the compositions of the invention said mixtures have proven to be soluble in aqueous environments, despite ionic complexes forming between the acid polysaccharides and chitosan derivatives. Said compositions have also demonstrated significant rheological behaviour with an unexpected increase in viscosity and viscoelasticity, although the polysaccharides used have relatively low average molecular weights. The said solubility and rheological behaviour renders the compositions of the invention particularly advantageous from the biomedical application viewpoint, in particular for viscosupplementation and particularly in the field of articular pathologies and of ophthalmic surgery. | 08-06-2009 |
20090202580 | METHOD FOR THE PREPARATION OF SPECIFIC ANTIBODIES AGAINST SACCHARIDIC ANTIGENS - The present invention relates to new compounds useful for the stimulation of the production of antibodies. Said compounds comprises a saccharidic tumor antigen and a polymeric scaffold. The present invention also encompasses conjugated compounds useful in ELISA assay for the selection of antibodies against saccharidic antigens. | 08-13-2009 |
20090202640 | HYDROGELS OF POLYSACCHARIDE MIXTURES FOR TISSUE ENGINEERING AND AS CARRIERS OF ACTIVE COMPOUNDS - The present invention describes the preparation of hydrogels (or 3D matrices) obtainable from aqueous solutions of mixtures of acid polysaccharides and derivatives of basic polysaccharides, such as oligosaccharide derivatives of chitosan. Said solutions are suitably gelled with either chemical or physical gelling agents with the aim of encapsulating either cells, isolated or in multicellular associations, or pharmacologically active molecules, in solution or suspension, for use in the biomedical and pharmaceutical field. | 08-13-2009 |
20100166656 | Diagnostic And Radiotherapeutic Contrast Agents And Process For Their Preparation - The present invention refers to diagnostically or radiotherapeutically useful compounds which are able to selectively bind to lectins, having formula (I) wherein R, R′, R | 07-01-2010 |
20110123589 | THREE-DIMENSIONAL NANOCOMPOSITE MATERIALS CONSISTING OF A POLYSACCHARIDIC MATRIX AND METALLIC NANOPARTICLES, PREPARATION AND USE THEREOF - In the present invention nanocomposite materials in form of three-dimensional structure formed by a polymeric matrix consisting of a polysaccharidic composition of neutral or anionic polysaccharides and a branched cationic polysaccharides, in which metallic nanoparticles are uniformly dispersed and stabilized, are described. Using appropriate techniques of gelification or by means of an appropriate dehydration, the nanocomposite materials are three-dimensional matrices having different shapes in hydrated form as hydrogels, or in non-hydrated form. These nanocomposite materials have a broad-spectrum of strong bactericidal activity, but do not show any cytotoxicity. The particular antibacterial properties associated with metallic particle nano-scale and the presence of biological signals on the polymeric chains along with the lack of cytotoxicity may be exploited in developing new-generation biomaterials provided with antimicrobial properties and for many other applications in biomedical, pharmaceutical and food field. | 05-26-2011 |
20110129536 | NANOCOMPOSITE MATERIALS BASED ON METALLIC NANOPARTICLES STABILIZED WITH BRANCHED POLYSACCHARIDES - The present invention provides nanocomposite systems made of metallic nanoparticles stabilized with branched cationic polysaccharides, in particular alditolic or aldonic mono- and oligo-saccharidic derivatives of chitosan, and their preparation obtainable with aqueous solutions of these polysaccharides in the presence or absence of reducing agents. The peculiar chemical and physical-chemical features of these polysaccharides allow to form metallic nanoparticles homogeneously dispersed in the polysaccharidic matrix and an effective stabilization thereof. The properties associated with the nanometric dimensions and the presence of biological signals on polymeric chains may be exploited in applications with antimicrobial activities and of molecular biosensors. | 06-02-2011 |