Patent US3562681A successfully refreshed from Google Patents.
US3562681A
Expired / Lapsed
US
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Indicator device with magnetic switch closure
Assignee: Individual
•
Filing: 1968-12-11
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Granted: 1971-02-09
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Expires: 1988-12-11
Abstract
Abstract A MOVABLE MAGNET CARRYING MEMBER, A DIAL HAVING ONE OR MORE SWITCHES IN THE PATH OF THE MOVING MAGNETIC FIELD PRODUCED BY THE MOVING MAGNET. THE SWITCHES ARE ACTUATED IN RESPONSE TO THE PRESENCE OF A SUFFICIENTLY HIGH MAGNETIC FIELD TO OPERATE A CONTROL CIRCUIT. THE DIAL IS MOVABLE TO VARY THE LOCATIONS OF THE SWITCHES.
Inventors
- 👤 Richard J Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:53
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/22; G01D13/26
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |