Underwater excavation apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12110653
APP PUB NO 20230138350A1
SERIAL NO

17973241

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

“There is disclosed an excavation apparatus (5), such as an underwater excavation apparatus, having means for producing, in use, at least one vortex, spiral or turbulent flow in a laminar flow of fluid, e.g. water. The excavation apparatus (5) comprises a rotor (10) having a rotor rotation axis (A), wherein, in use, flow of fluid past or across the rotor (10) is at a first angle (α) from the axis of rotation (A). The excavation apparatus (5) comprises the rotor (5) and means or an arrangement for dampening reactive torque on the apparatus (5) caused by rotation of the rotor (10), in use. The turbulent flow is provided within, such as within a (transverse) cross-section, of the laminar flow.”

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
ROTECH GROUP LIMITEDABERDEEN ABERDEENSHIRE AB16 6HQ

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Stewart, Donald Aberdeen Aberdeensire, GB 24 174
Stewart, Kenneth Roderick Aberdeen Aberdeensire, GB 21 196

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Apr 8, 2028
7.5 Year Payment $3600.00 $1800.00 $900.00 Apr 8, 2032
11.5 Year Payment $7400.00 $3700.00 $1850.00 Apr 8, 2036
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
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