US2847543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card-type resistance device
Assignee: Individual
•
Filing: 1955-01-18
•
Granted: 1958-08-12
•
Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Cobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:28
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/20; G01R1/206; H; H01; H01C; H01C10/00; H01C10/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US740189A
Cited
US1577208A
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US2180659A
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US2325958A
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US2310438A
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US2624823A
Cited
US2586609A
Cited
US2655582A
Cited
US2662944A
Cited
US2717947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |