Pump apparatus and underwater trenching apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 1, 2017
Grant Date -
Dec 11, 2014
app pub date -
Dec 21, 2012
filing date -
Dec 22, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A pump apparatus comprises a primary pump having a relatively low pressure fluid input and a relatively high pressure fluid output and means, associated with said primary pump fluid input, operable where the ambient pressure is insufficient substantially to prevent cavitation in the primary pump, to locally increase the pressure at said primary pump fluid input.
First Claim
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International Classification(s)
- 2012 Application Filing Year
- F04B Class
- 820 Applications Filed
- 689 Patents Issued To-Date
- 84.03 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F04B Class
- 0 % this patent is cited more than
- 8 Age
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| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Feb 1, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 1, 2029 |
