US2468703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chronometric electronic radiosonde system
Assignee: SERDEX Inc
•
Filing: 1946-09-26
•
Granted: 1949-04-26
•
Expires: 1966-09-26
Abstract
No abstract record available.
Inventors
- 👤 Clifford M Hammel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:00
CPC Classifications
G; G01; G01W; G01W1/00; G01W1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2027367A
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US2216161A
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US2402973A
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US2403210A
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US2403890A
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US2395467A
Cited
US2381009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |