US2499484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage rectifying circuit
Assignee: RCA Corp
•
Filing: 1945-11-28
•
Granted: 1950-03-07
•
Expires: 1965-11-28
Abstract
No abstract record available.
Inventors
- 👤 Albert W Friend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:12
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1450061A
Cited
US1666473A
Cited
US1475583A
Cited
GB197782A
Cited
US1683137A
Cited
US2405069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |