US2535255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical system for locating a sound source
Assignee: Individual
•
Filing: 1945-05-23
•
Granted: 1950-12-26
•
Expires: 1965-05-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Barnes
- 👤 Michael J Burger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:54
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1526337A
Cited
US1946290A
Cited
US2021766A
Cited
CH181665A
Cited
US2206827A
Cited
US2269603A
Cited
US2301195A
Cited
US2400552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |