Patent US3169208A successfully refreshed from Google Patents.
US3169208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequence spark gap system with perforated gap electrodes
Assignee: Ferranti International PLC
•
Filing: 1962-06-12
•
Granted: 1965-02-09
•
Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Harrington William Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
H; H01; H01J; H01J17/00; G; G01; G01R; G01R31/00; G01R31/50; G01R31/62; H01J21/00; H01T; H01T2/00; H01T2/02; H01J2893/00; H01J2893/0059
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A SEQUENCE SPARK GAP DEVICE COMPRISING A STACK OF SERIES CONNECTED SPARK GAPS EACH HAVING A PAIR OF ELECTRODES, SAID STACK OF SPARK GAPS BEING ADAPTED TO BE CONNECTED ACROSS A HIGH VOLTAGE SOURCE WITH THE ELECTRODES OF SAID SPARK GAPS ARRANGED IN A SINGLE LINE, AT LEAST ONE SPARK GAP AT ONE END OF SAID STACK BEING PROVIDED WITH A TRIGGER ELECTRODE, THE ELECTRODES OF EACH OF SAID SPARK GAPS NOT PROVIDED WITH A TRIGGER ELECTRODE INCLUDING A
Claim 2
Dependent Claim
79 words
A SEQUENCE SPARK GAP DEVICE COMPRISING A STACK OF SERIES CONNECTED SPARK GAPS EACH HAVING A PAIR OF ELECTRODES, SAID STACK OF SPARK GAPS BEING ADAPTED TO BE CONNECTED ACROSS A HIGH VOLTAGE SOURCE WITH THE ELECTRODES OF SAID SPARK GAPS ARRANGED IN A SINGLE LINE, AT LEAST ONE SPARK GAP AT ONE END OF SAID STACK BEING PROVIDED WITH A TRIGGER ELECTRODE, THE ELECTRODES OF EACH OF SAID SPARK GAPS NOT PROVIDED WITH A TRIGGER ELECTRODE INCLUDING A
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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |