US3289126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury switch employing magnetizable fluid
Assignee: PNC Bank NA
•
Filing: 1963-01-10
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Granted: 1966-11-29
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Expires: 1983-01-10
Abstract
No abstract record available.
Inventors
- 👤 Hurvitz Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:50
CPC Classifications
H; H01; H01H; H01H53/00; H01H53/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
A MERCURY SWITCH COMPRISING AN ELONGATED CYLINDER OF CAPILLARY DIAMETER HAVING AN OPEN END, AN ELECTRODE, SAID CYLINDER AND SAID ELECTRODE BEING MERCURY WETTABLE, AN INSULATING RING JOINING SAID ELECTRODE AND SAID CYLINDER AT SAID OPEN END, SAID RING BEING FABRICATED OF MERCURY UNWETTABLE MATERIAL, A QUANTITY OF MERCURY IN SAID CYLINDER HAVING A SUFFICIENT QUANTITY OF MAGNETIC PARTICLES THEREIN TO FORM A MAGNETIC FLUID, THE MAGNETIC FLUID CONTAINED IN SAID CYLINDER BEING OF SUCH AN AMOUNT THAT SAID FLUID IS RETAINED IN SAID CYLINDER SPACED FROM SAID ELECTRODE BY THE CAPILLARY ACTION OF SAID CYLINDER, AND MAGNETIC MEANS FOR DISTORTING SAID MAGNETIC FLUID INTO AND OUT OF CONTACT RELATION TO SAID ELECTRODE WHILE SAID MAGNETIC FLUID IS RETAINED IN SAID CYLINDER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |