US3477760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipurpose teaching unit
Assignee: Sico Inc
•
Filing: 1966-06-02
•
Granted: 1969-11-11
•
Expires: 1986-06-02
Abstract
No abstract record available.
Inventors
- 👤 Richard C Bue
- 👤 Julian Gutierrez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:48
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/08; G09B5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US600234A
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US1349710A
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US1375855A
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US1756210A
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US1818606A
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US2560001A
Cited
US2660504A
Cited
US3017969A
Cited
US3285555A
Cited
US3266840A
Cited
US3366415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |