US2477027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Star recognition trainer
Assignee: Individual
•
Filing: 1945-06-07
•
Granted: 1949-07-26
•
Expires: 1965-06-07
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Wenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:01
CPC Classifications
G; G09; G09B; G09B27/00; G09B27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US336280A
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US501136A
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US680461A
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US988471A
Cited
US1132409A
Cited
US1150731A
Cited
FR609605A
Cited
GB342886A
Cited
US2382643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |