Patent US2474096A successfully refreshed from Google Patents.
US2474096A
Expired / Lapsed
US
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Optical training apparatus
Assignee: Individual
•
Filing: 1945-04-17
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Granted: 1949-06-21
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Expires: 1965-04-17
Abstract
No abstract record available.
Inventors
- 👤 Richard C Dehmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:10
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/32; G09B9/326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1419598A
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US1631866A
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US1874279A
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US2085050A
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US2271296A
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US2289877A
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US2369418A
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US2336436A
Cited
US2307840A
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US2352101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |