US2145711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sounding signal device
Assignee: Motors Liquidation Co
•
Filing: 1934-04-19
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Granted: 1939-01-31
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Expires: 1954-04-19
Abstract
No abstract record available.
Inventors
- 👤 Robert M Critehfield
- 👤 White Joe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:33
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/12; G10K9/13; G10K9/15
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) | 1942-01-30 | 1942-08-01 | 1943-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-30 | 1946-08-01 | 1947-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-30 | 1950-08-01 | 1951-01-31 | $7700.00 | Window Closed / Lapsed |