US3354345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightning arrester spark gap having arc-confining chamber walls of graded porosity
Assignee: General Electric Co
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Filing: 1964-07-06
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Granted: 1967-11-21
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Earl W Stetson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/02; H01T1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
IN A CURRENT INTERRUPT, AN ARC CHAMBER HAVING CERAMIC WALLS EACH OF WHICH HAS A PROSITY GRADIENT, A PAIR OF ELECTRODES IN SAID CHAMBER BETWEEN WHICH AN ARC IS STRUCK, SAID CHAMBER HAVING A REGION WITH RELATIVELY SLOW POROSITY WALLS ADJACENT WHERE AN ARC IS STRUCK BE-
Claim 2
Dependent Claim
47 words
IN A CURRENT INTERRUPT, AN ARC CHAMBER HAVING CERAMIC WALLS EACH OF WHICH HAS A PROSITY GRADIENT, A PAIR OF ELECTRODES IN SAID CHAMBER BETWEEN WHICH AN ARC IS STRUCK, SAID CHAMBER HAVING A REGION WITH RELATIVELY SLOW POROSITY WALLS ADJACENT WHERE AN ARC IS STRUCK BE-
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |