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US3303580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational aid
Assignee: Individual
•
Filing: 1965-02-12
•
Granted: 1967-02-14
•
Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Virginia L Stinar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:20
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN EDUCATIONAL DEVICE COMPRISING IN COMBINATION; A CASING HAVING A BOTTOM WALL, SIDE WALLS, FRONT AND REAR WALLS AND A TOP CLOSURE, SAID CLOSURE COMPRISING A FRONT AND A REAR PORTION SLOPING UPWARDLY FROM SAID FRONT AND REAR WALLS RESPECTIVELY IN A MANNER THAT WHEN THE FRONT PORTION IS VIEWED FROM A NORMAL OPERATING POSITION, THE REAR PORTION IS HIDDEN, AND HAVING A FIRST PAIR OF LATERALLY SPACED OPENINGS IN SAID REAR PORTION, AND A SECOND PAIR OF LATERALLY SPACED OPENINGS IN SAID FRONT PORTION OFFSET LATERALLY FROM SAID FIRST PAIR OF OPENINGS, TWO INDEPENDENTLY ROTATABLE DRIVING GEARS MOUNTED WITHIN SAID CASING ONE EACH THROUGH EACH OF SAID SIDE WALLS AND ROTATABLE FROM THE EXTERIOR THEREOF, AT LEAST ONE PAIR OF ROLLERS ROTATABLY MOUNTED WITHIN THE CASING FORWARDLY OF SAID DRIVING GEARS, AT LEAST ONE PAIR OF ROLLERS SIMILARLY MOUNTED REARWARDLY
Claim 2
Dependent Claim
141 words
AN EDUCATIONAL DEVICE COMPRISING IN COMBINATION; A CASING HAVING A BOTTOM WALL, SIDE WALLS, FRONT AND REAR WALLS AND A TOP CLOSURE, SAID CLOSURE COMPRISING A FRONT AND A REAR PORTION SLOPING UPWARDLY FROM SAID FRONT AND REAR WALLS RESPECTIVELY IN A MANNER THAT WHEN THE FRONT PORTION IS VIEWED FROM A NORMAL OPERATING POSITION, THE REAR PORTION IS HIDDEN, AND HAVING A FIRST PAIR OF LATERALLY SPACED OPENINGS IN SAID REAR PORTION, AND A SECOND PAIR OF LATERALLY SPACED OPENINGS IN SAID FRONT PORTION OFFSET LATERALLY FROM SAID FIRST PAIR OF OPENINGS, TWO INDEPENDENTLY ROTATABLE DRIVING GEARS MOUNTED WITHIN SAID CASING ONE EACH THROUGH EACH OF SAID SIDE WALLS AND ROTATABLE FROM THE EXTERIOR THEREOF, AT LEAST ONE PAIR OF ROLLERS ROTATABLY MOUNTED WITHIN THE CASING FORWARDLY OF SAID DRIVING GEARS, AT LEAST ONE PAIR OF ROLLERS SIMILARLY MOUNTED REARWARDLY
References Cited (Backward Citations)
US1230997A
Cited
GB486337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |