US3348075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit identifier
Assignee: AT&T Inc
•
Filing: 1964-07-22
•
Granted: 1967-10-17
•
Expires: 1984-07-22
Abstract
No abstract record available.
Inventors
- 👤 Harold N Wagar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:28
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/22; H01H67/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
IN A SWITCHING DEVICE THE COMBINATION COMPRISING: ELECTRICALLY CONDUCTING MEANS ARRANGED IN SUBSTANTIALLY COLUMN AND ROW FORMATION; A PLURALITY OF SWITCHES FOR ELECTRICALLY INTERCONNECTING ROW AND COLUMN PORTIONS OF SAID ELECTRICALLY CONDUCTING MEANS, EACH OF SAID SWITCHES INCLUDING A SOURCE OF OPERATIVE MAGNETIC FLUX AND A PAIR OF OVERLAPPING MAGNETIC CONTACTS SEALED IN A VESSEL, SAID CONTACTS BEING ARRANGED TO CLOSE IN RESPONSE TO THE APPLICATION OF OPERATIVE MAGNETIC FLUX FROM SAID SOURCE, TO CONDUCT AN ELECTRICAL CURRENT AND TO CONDUCT AN ANNULAR MAGNETIC FLUX INDUCED WHEN SAID ELECTRICAL CURRENT FLOWS; AND
References Cited (Backward Citations)
US2872544A
Cited
US2827625A
Cited
US2999140A
Cited
US3134908A
Cited
US2975297A
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US3226604A
Cited
US3252083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |