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US3324573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: Individual
•
Filing: 1964-10-12
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Granted: 1967-06-13
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Expires: 1984-10-12
Abstract
No abstract record available.
Inventors
- 👤 David O Lavallee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:16
CPC Classifications
G; G09; G09B; G09B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AN EDUCATIONAL TOY COMPRISING: (A) A BASE, (B) A RELATIVELY NARROW WATER TANK SUPPORTED ON SAID BASE, (C) AN ENDLESS SCREEN MOUNTED ON SAID BASE BEHIND SAID TANK WHEREBY SAID SCREEN IS VIEWED BY LOOKING THROUGH SAID WATER TANK, SAID SCREEN DEPICTING UNDERWATER SCENES, (D) MEANS FOR EFFECTING MOVEMENT OF SAID SCREEN, (E) MEANS FOR ILLUMINATING SAID SCREEN, (F) AND A LIGHT DIFFUSER DISPOSED BETWEEN SAID ILLUMINATING MEANS AND SAID SCREEN, SAID DIFFUSER INCLUDING MEANS TO VARY THE AMOUNT OF LIGHT PENETRATING THERETHROUGH TO IMPART AN OPTICAL ILLUSION OF MOTION TO THE SCENE DEPICTED ON SAID SCREEN.
Claim 2
Dependent Claim
97 words
AN EDUCATIONAL TOY COMPRISING: (A) A BASE, (B) A RELATIVELY NARROW WATER TANK SUPPORTED ON SAID BASE, (C) AN ENDLESS SCREEN MOUNTED ON SAID BASE BEHIND SAID TANK WHEREBY SAID SCREEN IS VIEWED BY LOOKING THROUGH SAID WATER TANK, SAID SCREEN DEPICTING UNDERWATER SCENES, (D) MEANS FOR EFFECTING MOVEMENT OF SAID SCREEN, (E) MEANS FOR ILLUMINATING SAID SCREEN, (F) AND A LIGHT DIFFUSER DISPOSED BETWEEN SAID ILLUMINATING MEANS AND SAID SCREEN, SAID DIFFUSER INCLUDING MEANS TO VARY THE AMOUNT OF LIGHT PENETRATING THERETHROUGH TO IMPART AN OPTICAL ILLUSION OF MOTION TO THE SCENE DEPICTED ON SAID SCREEN.
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |