US2780795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distance measurements by sonic means
Assignee: Individual
•
Filing: 1953-05-28
•
Granted: 1957-02-05
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Expires: 1973-05-28
Abstract
No abstract record available.
Inventors
- 👤 Biagio F Ambrosio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:43
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/52004; G01S7/52006; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/14; Y; Y10; Y10S; Y10S367/00; Y10S367/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |