US2487778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic altimeter setting indicator and transmitter
Assignee: Individual
•
Filing: 1948-01-29
•
Granted: 1949-11-15
•
Expires: 1968-01-29
Abstract
No abstract record available.
Inventors
- 👤 Atlas David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/04; G01S1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US835840A
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US1146486A
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US1530363A
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US1673369A
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US2047900A
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US1913511A
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US1972289A
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US1931091A
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US1967778A
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US2224244A
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US2444818A
Cited
US2444106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |