Three stage watercraft
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 27, 2017
Grant Date -
Sep 29, 2016
app pub date -
Mar 24, 2016
filing date -
Mar 24, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A three stage watercraft for operation in the water as a traditional boat at low speeds in stage one, for operation on the water's surface at mid-range speeds at stage two, and for traveling in ground effect at higher range speeds is disclosed. The three stage craft includes a hydro-wing 12, either at least a single hydrofoil 13 or gyration rotor 14 to aid with lift from stage one to stage two, and a pair of outboard floats or hydro-floats 16a, 16b supported by the hydro-wing 12, which are also designed to aid with lift from stage one to stage two.
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)
Patent Owner | Address | |
---|---|---|
AMPHFOIL INC | BUILDING #2 19 BROADCOMMON ROAD BRISTOL RI 02809 |
International Classification(s)

- 2016 Application Filing Year
- B60V Class
- 12 Applications Filed
- 8 Patents Issued To-Date
- 66.67 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Schulz, Walter | New Bedford, US | 8 | 74 |
# of filed Patents : 8 Total Citations : 74 |
Cited Art Landscape
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Patent Citation Ranking
- 3 Citation Count
- B60V Class
- 0 % this patent is cited more than
- 8 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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7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 27, 2024 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 27, 2028 |
Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
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Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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