Patent US2433389A successfully refreshed from Google Patents.
US2433389A
Expired / Lapsed
US
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Remote control system for step-bystep adjustment of variable impedances
Assignee: International Standard Electric Corp
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Filing: 1942-09-17
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Granted: 1947-12-30
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Expires: 1962-09-17
Abstract
No abstract record available.
Inventors
- 👤 Newton Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:37
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/14; H03J5/146
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |