US2865015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for echo ranging
Assignee: Individual
•
Filing: 1944-07-14
•
Granted: 1958-12-16
•
Expires: 1964-07-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur Nelson Butz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:11
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/42; Y; Y10; Y10S; Y10S367/00; Y10S367/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2167492A
Cited
US2143035A
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US2166991A
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US2251708A
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US2282402A
Cited
US2355502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |