US3277414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polar transfer switch
Assignee: AT&T Inc
•
Filing: 1964-03-05
•
Granted: 1966-10-04
•
Expires: 1984-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jack A Piccininni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:03
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE COMBINATIONN COMPRISING: A CORE MADE OF A MATERIAL HAVING A COERCIVE FORCE IN THE ORDER OF 50 OERSTEDS; A COIL WOUND ON SAID CORE; A FIRST BAR-TYPE PERMANENT MAGNETIC DISPOSED IN PARALLEL WITH SAID CORE; A SEALED CONTACT REED SWTICH DISPOSED IN PARALLEL BETWEEN SAID CORE AND SAID FIRST PERMANENT MAGNET; A SECOND PERMANENT MAGNET DISPOSED IN PARALLEL WITH SAID CORE AND WITH ITS MAGNETIC POLARITY REVERSED WITH RESPECT TO THE POLARITY OF SAID FIRST PERMANENT MAGNET; AND ANOTHER SEALED CONTACT REED SWITCH DISPOSED IN PARALLEL BETWEEN SAID SECOND PERMANENT MAGNET AND SAID CORE.
Claim 2
Dependent Claim
95 words
THE COMBINATIONN COMPRISING: A CORE MADE OF A MATERIAL HAVING A COERCIVE FORCE IN THE ORDER OF 50 OERSTEDS; A COIL WOUND ON SAID CORE; A FIRST BAR-TYPE PERMANENT MAGNETIC DISPOSED IN PARALLEL WITH SAID CORE; A SEALED CONTACT REED SWTICH DISPOSED IN PARALLEL BETWEEN SAID CORE AND SAID FIRST PERMANENT MAGNET; A SECOND PERMANENT MAGNET DISPOSED IN PARALLEL WITH SAID CORE AND WITH ITS MAGNETIC POLARITY REVERSED WITH RESPECT TO THE POLARITY OF SAID FIRST PERMANENT MAGNET; AND ANOTHER SEALED CONTACT REED SWITCH DISPOSED IN PARALLEL BETWEEN SAID SECOND PERMANENT MAGNET AND SAID CORE.
References Cited (Backward Citations)
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |