US3093913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching device
Assignee: Individual
•
Filing: 1961-07-19
•
Granted: 1963-06-18
•
Expires: 1981-07-19
Abstract
No abstract record available.
Inventors
- 👤 John R Wyllie
- 👤 Henry J Manzella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:49
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A TEACHING DEVICE COMPRISING, A BASE OPEN AT BOTH ENDS, A GENERALLY FLAT TOP ON THE BASE HAVING AN OPENING INTERMEDIATE ITS ENDS, A PAIR OF GENERALLY PARALLEL SIDES ON THE BASE DEPENDING FROM THE TOP, A TRAY SLIDABLY MOUNTED WITHIN THE BASE BENEATH THE TOP IN BETWEEN THE SIDES, AND MEANS IN THE SIDE WALLS ADAPTED TO RECEIVE MEANS FOR SLIDING THE TRAY FROM ONE END OF THE BASE TO THE OTHER.
Claim 2
Dependent Claim
73 words
A TEACHING DEVICE COMPRISING, A BASE OPEN AT BOTH ENDS, A GENERALLY FLAT TOP ON THE BASE HAVING AN OPENING INTERMEDIATE ITS ENDS, A PAIR OF GENERALLY PARALLEL SIDES ON THE BASE DEPENDING FROM THE TOP, A TRAY SLIDABLY MOUNTED WITHIN THE BASE BENEATH THE TOP IN BETWEEN THE SIDES, AND MEANS IN THE SIDE WALLS ADAPTED TO RECEIVE MEANS FOR SLIDING THE TRAY FROM ONE END OF THE BASE TO THE OTHER.
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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |