US3618367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration pick-up device
Assignee: Individual
•
Filing: 1970-01-22
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Granted: 1971-11-09
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Expires: 1990-01-22
Abstract
Abstract APPARATUS FOR BALANCING ROTATABLE BODIES, SUCH AS AUTOMOTIVE VEHICLE WHEELS, CHARACTERIZED BY AN ELECTROMAGNETIC PICK-UP DEVICE INCLUDING A PAIR OF CANTILEVERED SPRINGS PROVIDING A DOUBLE SPRING SUSPENSION, ONE BEING SUPPORTED BY THE OTHER, AND INCLUDING SUITABLE DAMPING MEANS, THE CONSTRUCTION BEING SUCH THAT THE SIGNAL OUTPUT HAS NON-LINEAR CHARACTERISTICS WITH CHANGE IN FREQUENCY.
Inventors
- 👤 Marcellus S Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:52
CPC Classifications
G; G01; G01H; G01H1/00; G01H1/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |