Downthrust pads for submersible centrifugal pumps
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 22, 2000
Grant Date -
N/A
app pub date -
Apr 2, 1998
filing date -
Apr 2, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A submersible centrifugal pump is claimed which includes an inner downthrust washer for receiving the downthrust load from the upward movement of the produced fluid, and an outer sealing washer, which is a non-load bearing washer, for allowing the repositioning of the impeller to prevent gaps that create recirculation.
First Claim
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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CAMCO INTERNATIONAL INC | 7030 ARDMORE HOUSTON TX 77054 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Chilcoat, Dwight Cameron | Dewey, OK | 1 | 42 |
# of filed Patents : 1 Total Citations : 42 | |||
Sheth, Ketankumar Kantilal | Tulsa, OK | 48 | 129 |
# of filed Patents : 48 Total Citations : 129 |
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Patent Citation Ranking
- 42 Citation Count
- F04D Class
- 96.84 % this patent is cited more than
- 25 Age
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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 |
---|---|---|---|
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 |
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