US3401469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational system with mobile student learning stations
Assignee: EDWIN K DOLE
•
Filing: 1966-04-21
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Granted: 1968-09-17
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Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 John A Shaver
- 👤 Edwin K Dole
- 👤 Robert S Osmond
- 👤 Thomas G Morrissey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:05
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/08; G09B5/12; A; A47; A47C; A47C7/00; A47C7/62; A47C7/72; A47C7/723; A47C7/727; H; H01; H01R; H01R24/00; H01R24/58; H04; H04B; H04B10/00; H04B10/25; H04B13/00; H04B3/00; H04B3/54; H01R2103/00
Claims Analysis
Total Claims: 0
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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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |