Filter having a filter layer that forms a protective barrier to prevent clogging of a gravel-less underdrain and method of making the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 27, 2009
Grant Date -
Feb 1, 2007
app pub date -
Jul 29, 2005
filing date -
Jul 29, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter having a gravel-less underdrain and a filter layer installed directly on top of the gravel-less underdrain. The filter layer is designed such that when fluid is directed through the filter layer at controlled rates a protective barrier is formed by the larger particles of the filter layer directly above the gravel-less underdrain to prevent clogging and/or structural failure of the gravel-less underdrain thereby obviating the need for one or more layers of gravel or torpedo sand.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully