US2687509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing instrument
Assignee: Individual
•
Filing: 1953-04-15
•
Granted: 1954-08-24
•
Expires: 1973-04-15
Abstract
No abstract record available.
Inventors
- 👤 Lewis Sidney Le Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:01
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/44; H; H01; H01H; H01H85/00; H01H85/02; H01H2085/0216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2534450A
Cited
US2588559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |