Patent application number | Description | Published |
20080287019 | Modified Polyolefin Surfaces - Surface modifiable polyolefins are disclosed that allow for the covalent attachment of further chemical entities. The surface modification does not leach from the polyolefin. Example embodiments include the covalent bonding of antimicrobial chemical entities to the modified surfaces to provide antimicrobial polyolefin films and fibres for use in packaging and non-wovens. | 11-20-2008 |
20090008323 | Water Filter Materials And Water Filters Containing A Mixture Of Microporous And Mesoporous Carbon Particles - A filter and filter material for providing or treating potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a mixture of a plurality of mesoporous and microporous activated carbon particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the reduction, killing or removal of bacteria, viruses, microbials, and TTHM are also provided. | 01-08-2009 |
20090194423 | WATER FILTERS AND METHODS INCORPORATING ACTIVATED CARBON PARTICLES AND SURFACE CARBON NANOFILAMENTS - A method of making a filter material for producing potable water comprises providing activated carbon particles, depositing one or more nanofilament precursors at least partially onto the surface of the activated carbon particles, agitating the activated carbon particles and deposited nanofilament precursors in the presence of carbonaceous vapor, and heating the activated carbon particles and the deposited nanofilament precursors in the presence of carbonaceous vapor at a temperature and time sufficient to produce the filter material comprising activated carbon particles having carbon nanofilaments on the surface of the particles. | 08-06-2009 |
20090218291 | METHODS FOR TREATING WATER - Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of mesoporous wood activated carbon filter particles and particles selected from the group consisting of mesoporous wood activated carbon filter particles coated entirely with a cationic polymer, mesoporous wood activated carbon filter particles partially coated with a cationic polymer, and mixtures thereof. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.4 mL/g and less than about 3 mL/g, and a ratio of the sum of the mesopore and macropore volumes to the total pore volume of the filter particles is greater than about 0.3. The filter removes bacteria and viruses from the water at a level of Filter Bacteria Log Removal of greater than about 2 logs and a Filter Viruses Log Removal of greater than about 1 log. | 09-03-2009 |
20090218292 | METHODS OF TREATING WATER - Disclosed is a method of providing portable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of filter particles consisting of mesoporous activated carbon wherein at least a portion of the plurality of filter particles is at least partially coated with silver or a silver-containing material. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.4 mL/g and less than about 3 mL/g, and a ratio of the sum of the mesopore and macropore volumes to the total pore volume of the filter particles is greater than about 0.3. The filter removes bacteria and viruses from the water at a level of Filter Bacteria Log Removal of greater than about 2 logs and a Filter Viruses Log Removal of greater than about 1 log. | 09-03-2009 |
20090230061 | METHODS FOR TREATING WATER - Disclosed is a method of providing potable water that includes providing a filter, passing water through the filter, and removing bacteria and viruses from the water with the filter. The filter comprises a housing having an inlet and an outlet and a filter material disposed within the housing, the filter material formed at least in part from a plurality of filter particles consisting of mesoporous activated carbon. A sum of mesopore and macropore volumes of the filter particles may be between about 0.2 mL/g and about 2 mL/g, wherein mesopore means an intra-particle pore having a diameter between 2 nm and 50 nm, and macropore means an intra-particle pore having a diameter greater than 50 nm, a total pore volume of the filter particles is greater than about 0.4 mL/g and less than about 3 mL/g, and a ratio of the sum of the mesopore and macropore volumes to the total pore volume of the filter particles is greater than about 0.3. The filter removes bacteria and viruses from the water at a level of Filter Bacteria Log Removal of greater than about 2 logs and a Filter Viruses Log Removal of greater than about 1 log. | 09-17-2009 |
20090308800 | WATER FILTER MATERIALS AND WATER FILTERS CONTAINING A MIXTURE OF MICROPOROUS AND MESOPOROUS CARBON PARTICLES - A filter and filter material for providing or treating potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a mixture of a plurality of mesoporous and microporous activated carbon particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the reduction, killing or removal of bacteria, viruses, microbials, and TTHM are also provided. | 12-17-2009 |
20100006507 | WATER TREATING METHODS - A method of treating low-pressure untreated drinking water includes providing a low-pressure water filter device, running low-pressure untreated drinking water from a source of low-pressure untreated drinking water through a low-pressure water filter of the low-pressure water filter device, removing bacteria and viruses from the low pressure untreated drinking water at a level of Filter Bacteria Log Removal of greater than about 2 logs and a Filter Viruses Log Removal of greater than about 1 log, and filling a storage housing with treated drinking water at greater than about 5 mL/min. The low-pressure water filter device may include a connector for connecting to an untreated drinking water source, a low-pressure water filter comprising mesoporous activated carbon particles and a storage housing. The average fluid contact time with the low-pressure water filter may be greater than about 2 seconds. | 01-14-2010 |
20100006508 | Multi-Stage Water Filters - Water filters and methods of filtering fluids (e.g., water) to produce treated water such as potable water. Specifically, water filters comprising activated carbon, fiber composites, or combinations thereof that are operable to remove heavy metals and/or viruses from fluids to produce potable water. The water filters may comprise at least one carbon filter comprising activated carbon particles, and at least one fiber composite filter comprising electropositive metallic fibers having dimensions of between 5 nm and 100 nm. The fiber composite filter may be disposed upstream of the carbon filter, downstream of the carbon filter, or both. | 01-14-2010 |
20110139701 | FILTERS COMPRISING AN ACTIVATED CARBON PARTICLE COATED WITH PDADMAC AND METHODS OF MAKING SAME - Embodiments of systems and methods for producing a coated activated carbon comprise the steps of providing activated carbon particles having a particle size up to about 100 μm, and coating the activated carbon particles by spraying droplets of a cationic polymer solution onto the surface of the activated carbon particles, wherein the cationic polymer solution comprises about 1% to about 15% by weight cationic polymer and the droplet size is between about 5 μm to about 100 μm. | 06-16-2011 |
20110155661 | WATER FILTER MATERIALS AND WATER FILTERS CONTAINING A MIXTURE OF MICROPOROUS AND MESOPOROUS CARBON PARTICLES - A filter and filter material for providing or treating potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a mixture of a plurality of mesoporous and microporous activated carbon particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the reduction, killing or removal of bacteria, viruses, microbials, and TTHM are also provided. | 06-30-2011 |