US2549775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator circuit responsive to hall effect
Assignee: International Standard Electric Corp
•
Filing: 1947-03-08
•
Granted: 1951-04-24
•
Expires: 1967-03-08
Abstract
No abstract record available.
Inventors
- 👤 Charchian Benjamin Malcolm
- 👤 Vallarino Antonio Ramon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:10
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/24; H03C3/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1778796A
Cited
US1841459A
Cited
US2085739A
Cited
US2321269A
Cited
US2346396A
Cited
US2418842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |