US1686451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-testing apparatus
Assignee: JOHN T CALEY
•
Filing: 1926-06-03
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Granted: 1928-10-02
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Expires: 1946-06-03
Abstract
No abstract record available.
Inventors
- 👤 Hill John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:56
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; H; H04; H04B; H04B17/00; H04B17/20; H04B17/201
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) | 1931-10-02 | 1932-04-02 | 1932-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-02 | 1936-04-02 | 1936-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-02 | 1940-04-02 | 1940-10-02 | $7700.00 | Window Closed / Lapsed |