US3317773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug having an electrode incorporating an electronegative material
Assignee: Individual
•
Filing: 1963-05-17
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Granted: 1967-05-02
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Inoue Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:55
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A SPARKPLUG FOR AN INTERNAL-COMBUSTION ENGINE, COMPRISING A GENERALLY CYLINDRICAL INSULATING BODY AND A PAIR OF SPACED-APART ELECTRODES MOUNTED UPON SAID BODY, SAID ELECTRODES HAVING EXTREMITIES EXTENDING CODIRECTIONALLY GENERALLY TRANSVERSELY TO THE AXIS OF SAID BODY TO FORM THEREBETWEEN AN ELONGATED SPARK GAP TRANSVERSE TO SAID AXIS, SAID ELECTRODES INCLUDING A FIRST ELECTRODE EXTENDING GENERALLY CENTRALLY THROUGH SAID BODY AND A SECOND ELECTRODE OUTWARDLY FROM SAID FIRST ELECTRODE, SAID EXTREMITIES HAVING A REGION OF CLOSEST APPROACH IN THE VICINITY OF SAID AXIS AND DIVERGING OUTWARDLY THEREFROM, AT LEAST ONE OF SAID ELECTRODES CONSISTING ESSENTIALLY, AT LEAST IN SAID REGION, OF A COPPER SPARKING ELEMENT HAVING BETWEEN 1 AND 10 WEIGHT PERCENT CUPROUS OXIDE IN SOLID SOLUTION THEREIN.
Claim 2
Dependent Claim
117 words
A SPARKPLUG FOR AN INTERNAL-COMBUSTION ENGINE, COMPRISING A GENERALLY CYLINDRICAL INSULATING BODY AND A PAIR OF SPACED-APART ELECTRODES MOUNTED UPON SAID BODY, SAID ELECTRODES HAVING EXTREMITIES EXTENDING CODIRECTIONALLY GENERALLY TRANSVERSELY TO THE AXIS OF SAID BODY TO FORM THEREBETWEEN AN ELONGATED SPARK GAP TRANSVERSE TO SAID AXIS, SAID ELECTRODES INCLUDING A FIRST ELECTRODE EXTENDING GENERALLY CENTRALLY THROUGH SAID BODY AND A SECOND ELECTRODE OUTWARDLY FROM SAID FIRST ELECTRODE, SAID EXTREMITIES HAVING A REGION OF CLOSEST APPROACH IN THE VICINITY OF SAID AXIS AND DIVERGING OUTWARDLY THEREFROM, AT LEAST ONE OF SAID ELECTRODES CONSISTING ESSENTIALLY, AT LEAST IN SAID REGION, OF A COPPER SPARKING ELEMENT HAVING BETWEEN 1 AND 10 WEIGHT PERCENT CUPROUS OXIDE IN SOLID SOLUTION THEREIN.
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |