US2512976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for producing constant current from constant potential
Assignee: Modern Controls Inc
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Filing: 1948-01-14
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Granted: 1950-06-27
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Expires: 1968-01-14
Abstract
No abstract record available.
Inventors
- 👤 Harold K Smeltzly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:46
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/325; H; H01; H01F; H01F38/00; H01F38/08
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) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |