US2657346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry contact rectifier
Assignee: International Standard Electric Corp
•
Filing: 1952-10-17
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Granted: 1953-10-27
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Expires: 1972-10-17
Abstract
No abstract record available.
Inventors
- 👤 Hill Ronald Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:54
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/048; H10D48/049; H10D48/047; H10P; H10P95/00; Y; Y10; Y10S; Y10S257/00; Y10S257/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |