US2686635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic ratio computing device
Assignee: Hagan Corp
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Filing: 1952-06-11
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Granted: 1954-08-17
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Expires: 1972-06-11
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Markson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:49
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/363; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/20; H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/20
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |