US3406972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational game employing magnetic attraction
Assignee: Albert Hl Wong
•
Filing: 1965-01-19
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Granted: 1968-10-22
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Expires: 1985-01-19
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)
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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 |