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US4005866A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic game

Assignee: Individual
•
Filing: 1975-09-15
•
Granted: 1977-02-01
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Expires: 1995-09-15
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Abstract

Abstract A magnetic skill game for two players where the magnetic properties of attraction, repulsion, or magnetic null are used as a means of secret guidance for the players in their attempt to capture each other's key-piece; consisting of a board made of a material that is not magnetic or ferro-magnetic except for at least one case which is ferro-magnetic and a set of pieces for each player which includes at least one piece which is not magnetic or ferro-magnetic and at least one piece that is ferro-magnetic; the latter being clearly identified as the key piece, and at least one piece that is magnetic (the polarity of the latter being opposite for the opposite player). The pieces of a player appear identical except for the ferro-magnetic piece identified as the key piece.

Inventors

  • 👤 Jean Pierre Marcil

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 18:54
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/00694; A63F9/00; A63F9/18; A63F2009/186; A63F11/00; A63F11/0074; A63F2011/0079

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 126 words
A magnetic skill game for two players where the magnetic properties of attraction, repulsion, or magnetic null are used as a means of secret guidance for the players in their attempt to capture each other's pieces; consisting of a board made of a material that is not magnetic or ferro-magnetic except for at least one case which is magnetic and a set of pieces for each player which includes at least one piece which is not magnetic or ferro-magnetic and at least one piece that is magnetic; the latter being visually distinguishable from all other pieces, and at least one piece that is magnetic, the polarity of the latter being opposite for opposite players; the pieces of a player appearing identical except for the magnetic piece.
Claim 2
Dependent Claim 126 words
A magnetic skill game for two players where the magnetic properties of attraction, repulsion, or magnetic null are used as a means of secret guidance for the players in their attempt to capture each other's pieces; consisting of a board made of a material that is not magnetic or ferro-magnetic except for at least one case which is magnetic and a set of pieces for each player which includes at least one piece which is not magnetic or ferro-magnetic and at least one piece that is magnetic; the latter being visually distinguishable from all other pieces, and at least one piece that is magnetic, the polarity of the latter being opposite for opposite players; the pieces of a player appearing identical except for the magnetic piece.

References Cited (Backward Citations)

US2819904A Cited
US3680865A Cited
US3761092A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-02-01 1980-08-02 1981-02-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-02-01 1984-08-02 1985-02-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-02-01 1988-08-02 1989-02-01 $7700.00 Window Closed / Lapsed

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