US3026634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio-visual electronic instructor
Assignee: LINGUATRONICS Inc
•
Filing: 1959-02-11
•
Granted: 1962-03-27
•
Expires: 1979-02-11
Abstract
No abstract record available.
Inventors
- 👤 Carlos A Irazoqui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:10
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/06; G09B5/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1928255A
Cited
US2071192A
Cited
US2416353A
Cited
US2628288A
Cited
US2678357A
Cited
GB763341A
Cited
GB766434A
Cited
US2858996A
Cited
US2876561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |