US2517805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase difference indicator
Assignee: Rauland Borg Corp
•
Filing: 1946-11-02
•
Granted: 1950-08-08
•
Expires: 1966-11-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Spindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:38
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2137846A
Cited
US2225348A
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US2318248A
Cited
US2349261A
Cited
US2416517A
Cited
US2411916A
Cited
US2394892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |