Patent US3306493A successfully refreshed from Google Patents.
Patent US3305945A successfully refreshed from Google Patents.
US3305945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational toy
Assignee: Individual
•
Filing: 1964-07-30
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Granted: 1967-02-28
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 John W Crawford
- 👤 Crawford Frances
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:42
CPC Classifications
A; A63; A63F; A63F3/00; A63F3/04; A63F3/0423; G; G09; G09B; G09B17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
AN EDUCATIONAL TOY OF THE CHARACTER DESCRIBED, COMPRISING A PLURALITY OF BLOCKS, EACH ONE OF WHICH HAS A SINGLE LETTER OF THE ALPHABET PROJECTING VERTICALLY UPWARD THEREFROM; AND A RACK ADAPTED TO RECEIVE THE SAID BLOCKS; AND A PLURALITY OF EQUALLY SPACED AND PARALLEL PINS PROJECTING VERTICALLY UPWARD FROM THE BOTTOM OF THE SAID RACK; AND EACH ONE OF THE SAID PINS HAVING AN UPPER END WITH A VERTICAL CONTOUR OF A DIFFERENT CONFIGURATION FROM THAT OF THE OTHER PINS; AND EACH ONE OF THE SAID BLOCKS HAVING A VERTICALLY DISPOSED RECESS IN THE BOTTOM THEREOF, EACH RECESS HAVING A VERTICAL CONTOUR WHICH MATCHES THE CONTOUR OF ONLY ONE PIN, THE SAID RECESS IS ADAPTED TO RECEIVE A GIVEN PIN IN ORDER THAT THE BLOCKS MAY BE PLACED ONLY IN A PREDETERMINED ORDER SO THAT THE VERTICALLY PROJECTING LETTERS ARE IN THE CORRECT LINEAR POSITION WHEN ALL OF THE BLOCKS HAVE BEEN PLACED WITHIN THE SAID RACK.
Claim 2
Dependent Claim
157 words
AN EDUCATIONAL TOY OF THE CHARACTER DESCRIBED, COMPRISING A PLURALITY OF BLOCKS, EACH ONE OF WHICH HAS A SINGLE LETTER OF THE ALPHABET PROJECTING VERTICALLY UPWARD THEREFROM; AND A RACK ADAPTED TO RECEIVE THE SAID BLOCKS; AND A PLURALITY OF EQUALLY SPACED AND PARALLEL PINS PROJECTING VERTICALLY UPWARD FROM THE BOTTOM OF THE SAID RACK; AND EACH ONE OF THE SAID PINS HAVING AN UPPER END WITH A VERTICAL CONTOUR OF A DIFFERENT CONFIGURATION FROM THAT OF THE OTHER PINS; AND EACH ONE OF THE SAID BLOCKS HAVING A VERTICALLY DISPOSED RECESS IN THE BOTTOM THEREOF, EACH RECESS HAVING A VERTICAL CONTOUR WHICH MATCHES THE CONTOUR OF ONLY ONE PIN, THE SAID RECESS IS ADAPTED TO RECEIVE A GIVEN PIN IN ORDER THAT THE BLOCKS MAY BE PLACED ONLY IN A PREDETERMINED ORDER SO THAT THE VERTICALLY PROJECTING LETTERS ARE IN THE CORRECT LINEAR POSITION WHEN ALL OF THE BLOCKS HAVE BEEN PLACED WITHIN THE SAID RACK.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |