Patent US2990281A successfully refreshed from Google Patents.
Patent US3093772A successfully refreshed from Google Patents.
US3093772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge diverters
Assignee: ASS ELECT IND MANCHESTER Ltd
•
Filing: 1958-05-02
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Granted: 1963-06-11
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Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
- 👤 Miller Alan David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:21
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A SURGE DIVERTER COMPRISING FOR CONNECTION BETWEEN AN A.C. CIRCUIT AND EARTH, A SERIES ARRANGEMENT OF AT LEAST TWO SWITCH CONTACTS, AT LEAST ONE SPARK GAP, AND A NONLINEAR RESISTANCE WHOSE OHMIC VALUE DECREASES AS THE CURRENT TRAVERSING IT INCREASES, MEANS PROVIDING A VACUUM SPACE IN WHICH SAID CONTACTS ARE MOUNTED, AND MEANS FOR EFFECTING SWITCH OPENING COMPRISING AN OPERATING COIL, SAID COIL BEING CONNECTED PARALLEL TO A PORTION AT LEAST OF SAID RESISTANCE.
Claim 2
Dependent Claim
74 words
A SURGE DIVERTER COMPRISING FOR CONNECTION BETWEEN AN A.C. CIRCUIT AND EARTH, A SERIES ARRANGEMENT OF AT LEAST TWO SWITCH CONTACTS, AT LEAST ONE SPARK GAP, AND A NONLINEAR RESISTANCE WHOSE OHMIC VALUE DECREASES AS THE CURRENT TRAVERSING IT INCREASES, MEANS PROVIDING A VACUUM SPACE IN WHICH SAID CONTACTS ARE MOUNTED, AND MEANS FOR EFFECTING SWITCH OPENING COMPRISING AN OPERATING COIL, SAID COIL BEING CONNECTED PARALLEL TO A PORTION AT LEAST OF SAID RESISTANCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |