US2472114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual training device
Assignee: Individual
•
Filing: 1946-02-08
•
Granted: 1949-06-07
•
Expires: 1966-02-08
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Marder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:31
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/28; G09B23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US359878A
Cited
US410135A
Cited
US598509A
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US960519A
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US799609A
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US813836A
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GB190918147A
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US1027448A
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US1104067A
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US1177652A
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US1218607A
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US1552406A
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GB214025A
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DE390974C
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US1639918A
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US2047002A
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US2045990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |