Chemical upgrading of filters
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 19, 2007
Grant Date -
Jun 26, 2003
app pub date -
Mar 27, 2001
filing date -
Mar 29, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention provides a filter treated with a humectant which may optionally be in combination with a surfactant. The treatment may also include a water soluble rheology modifier to alter the viscosity of water drawn onto the filter by the humectant. A tackifier may also be added. The invention also provides compositions suitable for application to a filter to carry out the treatment. The invention provides a method of 'upgrading' a filter using the treatments and compositions described.
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