Pump impeller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 30, 1986
Grant Date -
N/A
app pub date -
May 28, 1985
filing date -
Jun 6, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An impeller in a pump, in particular a sewage pump, the passage of which is required to have a given transmission capacity for transmitting the impurities present in the sewage water. When small volumetric flows are being pumped at great delivery lift, it would be advantageous, with a view to achieving good efficiency, to make the passage narrower than the inlet aperture, but up to date it has not been possible to do this without impairing the transmission capacity. In the impeller of the invention, this has been solved in that for achieving sufficient transmission capacity one wider point has been provided in the passage, located between the inlet and outlet margins of the impeller blade.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- GRUNDFOS MANAGEMENT A/S;OY E. SARLIN AB
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Sarvanne, Hannu | Kivivuorenkuja, FI | 5 | 150 |
# of filed Patents : 5 Total Citations : 150 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 2 Citation Count
- F04D Class
- 0 % this patent is cited more than
- 39 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Jan 23, 2018 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Mar 24, 2003 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Mar 23, 2003 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Mar 23, 2003 |
Oct 09, 2002 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Aug 21, 2001 | CC | CERTIFICATE OF CORRECTION | |
Mar 23, 1999 | I | Issuance | |
Jul 18, 1997 | F | Filing | |
Jul 18, 1997 | PD | Priority Date | |
Jul 08, 1997 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PUCILLO, BARRY;REEL/FRAME:008685/0335 Owner name: AMERICAN LOUVER COMPANY, ILLINOIS Effective Date: Jul 08, 1997 |

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