US2972123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable resistance unit
Assignee: CON ELCO
•
Filing: 1959-06-10
•
Granted: 1961-02-14
•
Expires: 1979-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Leonardus M Blom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:54
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/16; H01C10/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2881295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |