US3609877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational apparatus
Assignee: Individual
•
Filing: 1970-04-06
•
Granted: 1971-10-05
•
Expires: 1990-04-06
Abstract
Abstract EDUCATIONAL APPARATUS INCLUDING A PLANAR SURFACE HAVING GROUPS OF HOLES ARRANGED IN DISTINCTIVE PATTERNS. ADJACENT EACH GROUP OF HOLES IN INDICIA REPRESENTING THE INCOMPLETE NAME OF A FAMILIAR OBJECT. A PLURALITY OF BLOCKS EACH CARRY AN INDICIUM FOR COMPLETING ONE SET OF INDICIA TO FORM THE NAME OF A FAMILIAR OBJECT PICTORIALLY REPRESENTED ON THE BLOCK. PEGS EXTEND FROM THE BOTTOM SURFACE OF EACH BLOCK AND MATCH THE PATTERN OF ONE GROUP OF HOLES ON THE PLANAR SURFACE SO THAT IF A CORRECT ASSOCIATION HAS BEEN MADE BETWEEN THE INDICUM ON ONE BLOCK AND A SET OF INDICIA, THE PEGS ON THE BLOCK WILL FIT INTO THE HOLES INDICATING THAT A CORRECT SELECTION HAS BEEN MADE.
Inventors
- 👤 Harold Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:18
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |