Sand filter media and an improved method of purifying water
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 23, 1988
Issued Date -
N/A
app pub date -
Aug 14, 1987
filing date -
Aug 29, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A slow sand filtering system is disclosed, in which an uncovered filter tank has therein a layer of sand, and an effective filter-enhancing amount of zeolite. The zeolite is topped by a growth of schmutzdecke, with the schmutzdecke comprising a layer of living organism selected from the group consisting of algae, plankton, diatoms, protozoa, rotifers and bacteria.
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