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Invention relates to a water purification device comprises a water collecting device having a surface defining a variable volume and comprising a filter membrane permeable to water. The device comprises an expansion device for exerting a force for increasing the volume of water collecting device and thereby drawing water through the filter membrane into the water collecting device. The expansion device comprises a support structure supporting the filter membrane, wherein the support structure can be elastically deformed and is designed to settle snap, after being deformed, into one of at least two discrete stable configurations, a first one of these stable configurations being a low volume configuration of the support structure, a second one of these stable configurations being a high volume configuration of the support structure.
Status of Patent: Indian Patent Pending No.2616/MUM/2011 Click here
Invention relates to waterless and odorless urinal system. The object is achieved by the formation of a coating of silver nanoparticle colloidal composition on the surface of the urinal system, having parts like drain, waste pipe and sink, the wall or the part of the urinal system which comes in contact with the urine is coated with silver nanoparticle colloidal composition to inhibit the growth of odour causing bacteria, as it is a well-known fact that silver nanoparticles have an antibacterial activity. In another aspect of the invention, silver nanoparticle composition is formed by mixing silver nanoparticles in an effective amount with vinyl polymer and styrine mixture at an elevated temperature, which is subsequently dissolved with the mixture of the aliphatic or aromatic alcohols in an stoichiometric ratio.
Status of Patent: Indian Patent Pending No.1154/MUM/2010 Click here