US2882459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarised relay
Assignee: Individual
•
Filing: 1954-06-04
•
Granted: 1959-04-14
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Berglund Nils Knut Edvard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:18
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H02; H02K; H02K26/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190119462A
Cited
US878423A
Cited
DE512583C
Cited
US1805021A
Cited
US1830628A
Cited
US1870753A
Cited
CH210282A
Cited
US2610259A
Cited
US2732458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |