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US3406972A Expired / Lapsed US ⏱️ 0.0 years remaining

Educational game employing magnetic attraction

Assignee: Albert Hl Wong
•
Filing: 1965-01-19
•
Granted: 1968-10-22
•
Expires: 1985-01-19
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Abstract

No abstract record available.

Inventors

  • 👤 Albert H L Wong

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 20:19
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/04; A63F3/0457

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 169 words
AN EDUCATIONAL GAME COMPRINSING, A PLAYING BOARD WITH A SMOOTH, FLAT PLAYING SURFACE; A PLURALITY OF MAGNETIC PIECES, EACH OF WHICH IS ADAPTED TO MOVE ON SAID PLAYING SURFACE AND INCLUDES A PERMANENT MAGNET PIECES FORMED OF A RELATIVELY HARD FERRO MAGNETIC MATERIAL, SAID MAGNETIC PIECES BEING DRAWN TOGETHER WHEN BROUGHT INTO CLOSE PROXIMITY WITH THEIR OPPOSITE POLES ADJACENT ONE ANOTHER; A PLURALITY OF MAGNETICALLY ATTRACTABLE PIECES, EACH OF WHICH IS ADAPTED TO MOVE ON SAID PLAYING SURFACE, SAID MAGNETICALLY ATTRACTABLE PIECES BEING ATTRACTED BY SAID MAGNETIC PIECES WHEN IN CLOSE PROXIMITY THERETO, AND THE PIECE SO ATTACHED BEING MAGNETIZED SO AS TO ATTRACT OTHER AND MAGNETIC AND MAGNETICALLY ATTRACTABLE PIECES; AT LEAST ONE NONMAGNETIC PIECE ADAPTED TO MOVE ON SAID PLAYING SURFACE TO KNOCK SAID MAGNETIC AND MAGNETICALLY ATTRACTABLE PIECES INTO CLOSE PROXIMITY WITH ONE ANOTHER, WHEREBY TO FORM A MAGNETICALLY HELD CLUSTER; INDICIA ON SAID MAGNETIC AND MAGNETICALLY ATTRACTABLE PIECES; AND MEANS BEARING INDICIA CORRESPONDING TO THAT ON SAID PIECES AND RELATED INFORMATION TO SAID IN SCORING.

References Cited (Backward Citations)

US2492563A Cited
US2665912A Cited
US2665913A Cited
US2951703A Cited
US2987852A Cited
US3249357A Cited
US3237941A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1971-10-22 1972-04-22 1972-10-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1975-10-22 1976-04-22 1976-10-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1979-10-22 1980-04-22 1980-10-22 $7700.00 Window Closed / Lapsed

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