US3011269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic instruction device
Assignee: DE VRY TECHNICAL INSTITUTE Inc
•
Filing: 1958-09-24
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Granted: 1961-12-05
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Expires: 1978-09-24
Abstract
No abstract record available.
Inventors
- 👤 Orville I Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/06; G09B23/18; G09B23/183; G09B23/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1968039A
Cited
US2592552A
Cited
US2568535A
Cited
US2788470A
Cited
US2826628A
Cited
US2838849A
Cited
US2859540A
Cited
US2796683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |