US3199228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Word training aid
Assignee: Individual
•
Filing: 1962-04-30
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Granted: 1965-08-10
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Irvin C Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:51
CPC Classifications
G; G09; G09B; G09B17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN EDUCATIONAL DEVICE COMPRISING: A TWO-PART CIRCULAR ELEMENT, MEANS FIXEDLY SECURING THE TWO PARTS TOGETHER AXIALLY SPACED RELATION, EACH OF SAID PARTS HAVING A RADIAL SLOT, A COAXIAL ROTATABLE DISC BETWEEN SAID PARTS HAVING A GREATER DIAMETER THAN SAID CIRCULAR ELEMENT, A TWO-LEG SLIDER RADIALLY SLIDABLE BETWEEN SAID CIRCULAR ELEMKENT PARTS WITH ONE LEG ON EACH SIDE OF SAID ROTATABLE DISC AND HAVING APERTURES RESPECTIVELY SIMULTANEOUSLY REGISTRABLE WITH SAID CIRCULAR ELEMENT SLOTS, SAID DISC HAVING CORRELATED INDICIA ON OPPOSITE SIDES THEREOF SIMULTANEOUSLY VISIBLE THROUGH SAID SLOTS AND APERTURES.
Claim 2
Dependent Claim
88 words
AN EDUCATIONAL DEVICE COMPRISING: A TWO-PART CIRCULAR ELEMENT, MEANS FIXEDLY SECURING THE TWO PARTS TOGETHER AXIALLY SPACED RELATION, EACH OF SAID PARTS HAVING A RADIAL SLOT, A COAXIAL ROTATABLE DISC BETWEEN SAID PARTS HAVING A GREATER DIAMETER THAN SAID CIRCULAR ELEMENT, A TWO-LEG SLIDER RADIALLY SLIDABLE BETWEEN SAID CIRCULAR ELEMKENT PARTS WITH ONE LEG ON EACH SIDE OF SAID ROTATABLE DISC AND HAVING APERTURES RESPECTIVELY SIMULTANEOUSLY REGISTRABLE WITH SAID CIRCULAR ELEMENT SLOTS, SAID DISC HAVING CORRELATED INDICIA ON OPPOSITE SIDES THEREOF SIMULTANEOUSLY VISIBLE THROUGH SAID SLOTS AND APERTURES.
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |