Apparatus for indicating how dirty an air filter is in a vacuum-cleaning apparatus, in a room filter, etc.
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 25, 1992
Grant Date -
N/A
app pub date -
May 3, 1991
filing date -
May 5, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus is provided for indicating how dirty an air filter is that is disposed in an air stream for removing dirt therefrom. The apparatus includes an arrangement in the form of a light unit for measuring how dirty the air filter is. The apparatus also includes an indicator that is connected to the light unit.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
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