Patent US3102968A successfully refreshed from Google Patents.
US3102968A
Expired / Lapsed
US
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Vacuum spark gap device having composite electrodes
Assignee: Associated Electrical Industries Ltd
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Filing: 1961-10-26
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Granted: 1963-09-03
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Waterton Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:04
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A VACUUM SPARK GAP DEVICE INCLUDING TWO ELECTRODES WHICH DEFINE A SPARK GAP BETWEEN THEM, EACH SAID ELECTRODE BEING A COMPOSITE STRUCTURE COMPRISING A PART WHICH PRESENTS A REFERENCE SURFACE OF A FIRST METALLIC MATERIAL AND A QUANTITY OF A SECOND METALLIC MATERIAL EXPOSED TO THE OTHER ELECTRODE AT A POSITION ADJACENT TO SAID SURFACE, THE SECOND MATERIAL BEING CHARACTERISTIC OF A LOWER ARCING VOLTAGE THAN IS THE FIRST MATERIAL, AND THE FIRST MATERIAL HAVING A HIGHER MELTING POINT THAN THE SECOND MATERIAL.
Claim 2
Dependent Claim
83 words
A VACUUM SPARK GAP DEVICE INCLUDING TWO ELECTRODES WHICH DEFINE A SPARK GAP BETWEEN THEM, EACH SAID ELECTRODE BEING A COMPOSITE STRUCTURE COMPRISING A PART WHICH PRESENTS A REFERENCE SURFACE OF A FIRST METALLIC MATERIAL AND A QUANTITY OF A SECOND METALLIC MATERIAL EXPOSED TO THE OTHER ELECTRODE AT A POSITION ADJACENT TO SAID SURFACE, THE SECOND MATERIAL BEING CHARACTERISTIC OF A LOWER ARCING VOLTAGE THAN IS THE FIRST MATERIAL, AND THE FIRST MATERIAL HAVING A HIGHER MELTING POINT THAN THE SECOND MATERIAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |