US2713679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic speed recorder
Assignee: Individual
•
Filing: 1954-04-15
•
Granted: 1955-07-19
•
Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Ewertz Clement George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/64; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/106; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |