US2652464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarized relay
Assignee: Individual
•
Filing: 1951-05-31
•
Granted: 1953-09-15
•
Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Vigren Sten Daniel
- 👤 Claesson Per Harry Elias
- 👤 Zander Rolf Albin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US334185A
Cited
US922099A
Cited
US1743494A
Cited
DE654405C
Cited
US2034701A
Cited
DE712484C
Cited
US2412123A
Cited
GB604767A
Cited
US2526804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |