US1427181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sounding apparatus
Assignee: Individual
•
Filing: 1920-07-19
•
Granted: 1922-08-29
•
Expires: 1940-07-19
Abstract
No abstract record available.
Inventors
- 👤 Lester L Westling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:21
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/56; G01S7/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-08-28 | 1926-02-27 | 1926-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-08-28 | 1930-02-27 | 1930-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-08-28 | 1934-02-27 | 1934-08-29 | $7700.00 | Window Closed / Lapsed |