US3421232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Group training and educational apparatus
Assignee: EIDP Inc
•
Filing: 1965-06-29
•
Granted: 1969-01-14
•
Expires: 1985-06-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur Tillman Sherman
- 👤 Robert Harrison Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:34
CPC Classifications
G; G09; G09B; G09B25/00; G09B25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2636285A
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US3058663A
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US3026630A
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US3000112A
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US3082546A
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US3061945A
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US3146533A
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US3237318A
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US3310883A
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US3309793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |