US2981008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual apparatus for a flight trainer
Assignee: DALTO Corp
•
Filing: 1959-01-22
•
Granted: 1961-04-25
•
Expires: 1979-01-22
Abstract
No abstract record available.
Inventors
- 👤 Ward D Davis
- 👤 Pont Stephen Du
- 👤 Richard J Zeitler
- 👤 William R Batesole
- 👤 Arthur R Tucker
- 👤 Leif W Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:54
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA554518A
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US2027527A
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US2298476A
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US2413633A
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US2516069A
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US2711593A
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US2839840A
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US2883763A
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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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |