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US3747236A Expired / Lapsed US ⏱️ 0.0 years remaining

Flotation shoes

Assignee: Individual
•
Filing: 1971-11-30
•
Granted: 1973-07-24
•
Expires: 1991-11-30
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Abstract

Abstract A pair of shoes for being worn by a person so to enable him to walk upon the surface of a body of water, the device consisting of elongated shoes made of floatable material, each shoe being sufficiently large so to support the weight of the wearer, each shoe being provided with a fin tail so that the shoe moves forwardly instead of slipping sideward, and each shoe being provided with a downward extending fins or vanes on the under side thereof so to allow maximum forward motion with a minimum of slipping, the under side vanes in one form of the invention being stationary and in another form of the invention being of pivotable type so to retract into an inoperative position when the shoe is moved forwardly and wherein the vane extend downwardly into the water for holding against the water when the shoe is intended to be stationary.

Inventors

  • 👤 D Sidlauskas

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 14:57
CPC Classifications
B; B63; B63B; B63B34/00; B63B34/50; B63B34/56

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 118 words
In a flotation shoe, the combination of an elongated body made of stiff material that is floatable within water, said elongated body having means upon its upper side for attachment to a person''s foot, and the under side of said body having means for selectively holding said shoe in a stationary position while a shoe on the person''s other foot is forwardly moved during a walking operation upon water, said means on the under side of said shoe body comprising a plurality of transverse vanes, a forward end of said shoe box being tapered to a point for frictionally moving through the water, and a rear end of said shoe box being provided with a fish tail fin.
Claim 2
Dependent Claim 118 words
In a flotation shoe, the combination of an elongated body made of stiff material that is floatable within water, said elongated body having means upon its upper side for attachment to a person''s foot, and the under side of said body having means for selectively holding said shoe in a stationary position while a shoe on the person''s other foot is forwardly moved during a walking operation upon water, said means on the under side of said shoe body comprising a plurality of transverse vanes, a forward end of said shoe box being tapered to a point for frictionally moving through the water, and a rear end of said shoe box being provided with a fish tail fin.
Claim 3
Dependent Claim 33 words
The combination as set forth in claim 1 wherein said means for receiving a persons foot comprises a toe member and a heel member mounted upon the upper side of said shoe body.
Claim 4
Dependent Claim 28 words
The combination as set forth in claim 2 wherein said vanes on the under side of said shoe body are integral and stationary respective to said shoe body.
Claim 5
Dependent Claim 31 words
The combination as set forth in claim 3 wherein said vanes on the under side of said shoe are movable between a horizontal position and a pivotably downward rear inclined position.

References Cited (Backward Citations)

US2412474A Cited
US3082548A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-07-23 1977-01-22 1977-07-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-23 1981-01-22 1981-07-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-23 1985-01-22 1985-07-24 $7700.00 Window Closed / Lapsed

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