Patent US4068393A successfully refreshed from Google Patents.
Patent US2418718A successfully refreshed from Google Patents.
US2418718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational appliance
Assignee: Individual
•
Filing: 1944-05-06
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Granted: 1947-04-08
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Expires: 1964-05-06
Abstract
No abstract record available.
Inventors
- 👤 Clare J Maginley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:17
CPC Classifications
G; G09; G09B; G09B27/00; G09B27/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |