Patent US3226342A successfully refreshed from Google Patents.
US3226342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug and seal therefor
Assignee: Motors Liquidation Co
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Filing: 1962-11-09
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Granted: 1965-12-28
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Patrick N Kesten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:36
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A SEALING COMPOSITION FOR FOMING AN ELECTRICALLY CONDUCTIVE HERMETIC SEAL IN A CERAMIC INSULATOR, SAID HERMETIC SEAL BEING CAPABLE OF OPERATING HERMETICALLY AT TEMPERATURES UP TO 1400*F., SAID COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 45% TO 55% BY WEIGHT COPPER POWDER, ABOUT 9 TO 10% BY WEIGHT POWDERED CARBON BLACK AND THE REMAINDER A MIXTURE OF TWO BOROSILICATE GLASSES, ONE OF SAID BORSILICATE GLASSES CONSTITUTING ABOUT 60% TO 70% BY WEIGHT OF THE TOTAL GLASS CONTENT AND CONSISTING SUBSTANTIALLY OF 75% TO 85% BY WEIGHT SIO2 AND 10% TO 15% BY WEIGHT B2O3 AND THE OTHER OF SAID BOROSILICATE GLASSES CONSISTING SUBSTANTIALLY OF 60% TO 70% BY WEIGHT SIO2 AND ABOUT 20 TO 25% BY WEIGHT B2O3.
Claim 2
Dependent Claim
116 words
A SEALING COMPOSITION FOR FOMING AN ELECTRICALLY CONDUCTIVE HERMETIC SEAL IN A CERAMIC INSULATOR, SAID HERMETIC SEAL BEING CAPABLE OF OPERATING HERMETICALLY AT TEMPERATURES UP TO 1400*F., SAID COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 45% TO 55% BY WEIGHT COPPER POWDER, ABOUT 9 TO 10% BY WEIGHT POWDERED CARBON BLACK AND THE REMAINDER A MIXTURE OF TWO BOROSILICATE GLASSES, ONE OF SAID BORSILICATE GLASSES CONSTITUTING ABOUT 60% TO 70% BY WEIGHT OF THE TOTAL GLASS CONTENT AND CONSISTING SUBSTANTIALLY OF 75% TO 85% BY WEIGHT SIO2 AND 10% TO 15% BY WEIGHT B2O3 AND THE OTHER OF SAID BOROSILICATE GLASSES CONSISTING SUBSTANTIALLY OF 60% TO 70% BY WEIGHT SIO2 AND ABOUT 20 TO 25% BY WEIGHT B2O3.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |