US3246402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: Individual
•
Filing: 1963-07-11
•
Granted: 1966-04-19
•
Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Diamond Aaron Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:41
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN EDUCATIONAL DEVICE FOR ASSISTING AN INDIVIDUAL IN LEARNING COMPRISING A BASE, A BOARD SUPPORTED ON THE BASE AND HAVING AN OBSERVATION AREA COMPRISING AT LEAST ONE WINDOW OPENING THEREIN, A BACKING PLATE SUPPORTED FROM THE BASE IN SPACED RELATION TO THE BOARD TO PROVIDE A SLOT THEREBETWEEN, A SHEET IN THE SLOT BETWEEN THE BOARD AND BACKING PLATE AND HAVING INDICIA THEREON PRESENTING A PROBLEM AND POSSIBLE ANSWERS IN THE OBSERVATION AREA, SAID SHEET HAVING OPENINGS FORMING SHOULDERS AT DIFFERENT LOCATIONS IN PARALLEL PATHS IN THE DIRECTION OF MOVEMENT OF THE SHEET, A DETENT FOR EACH OF THE PLURALITY OF PATHS
Claim 2
Dependent Claim
102 words
AN EDUCATIONAL DEVICE FOR ASSISTING AN INDIVIDUAL IN LEARNING COMPRISING A BASE, A BOARD SUPPORTED ON THE BASE AND HAVING AN OBSERVATION AREA COMPRISING AT LEAST ONE WINDOW OPENING THEREIN, A BACKING PLATE SUPPORTED FROM THE BASE IN SPACED RELATION TO THE BOARD TO PROVIDE A SLOT THEREBETWEEN, A SHEET IN THE SLOT BETWEEN THE BOARD AND BACKING PLATE AND HAVING INDICIA THEREON PRESENTING A PROBLEM AND POSSIBLE ANSWERS IN THE OBSERVATION AREA, SAID SHEET HAVING OPENINGS FORMING SHOULDERS AT DIFFERENT LOCATIONS IN PARALLEL PATHS IN THE DIRECTION OF MOVEMENT OF THE SHEET, A DETENT FOR EACH OF THE PLURALITY OF PATHS
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |