US3247132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug seal
Assignee: Federal Mogul Ignition LLC
•
Filing: 1963-04-05
•
Granted: 1966-04-19
•
Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Harry G Schurecht
- 👤 Robert H Insley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:14
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN ELECTRICALLY CONDUCTING SUBSTANTIALLY GAS IMPERVIOUS SEALING MATERIAL PRODUCED BY FIRING TO A TEMPERATURE FROM ABOUT 1250*F. TO ABOUT 1750*F. A COMPOSITION CONSISTING ESSENTIALLY OF: FROM APPROXIMATELY 55 PARTS TO APPROXIMATELY 85 PARTS BY WEIGHT OF LEAD SILICATE GLASS, FROM APPROXIMATELY 6 TO APPROXIMATELY 20 PARTS BY WEIGHT OF ALUMINUM, SAID LEAD-SILICATE GLASS AND ALUMINUM BEING IN A WEIGHT RATIO OF AT LEAST ABOUT 55 TO 6, AND FROM APPROXIMATELY 10 TO APPROXIMATELY 40 PARTS BY WEIGHT OF METAL PARTICLES WETTED BY LEAD AND NOT APPRECIABLY OXIDIZED BY THE LEAD OXIDE OF THE GLASS AT SAID FIRING TEMPERATURE, THE INGREDIENTS BEING PROPORTIONED AND COMBINED TO PRODUCE A GLASSY MATERIAL HAVING AN ELECTRICALLY CONDUCTIVE PHASE OF LEAD DEPOSITED IN SITU AND RESTRAINED AGAINST MIGRATING FROM THE SEAL MATERIAL BY THE WETTED AND NONOXIDIZED METAL PARTICLES.
Claim 2
Dependent Claim
134 words
AN ELECTRICALLY CONDUCTING SUBSTANTIALLY GAS IMPERVIOUS SEALING MATERIAL PRODUCED BY FIRING TO A TEMPERATURE FROM ABOUT 1250*F. TO ABOUT 1750*F. A COMPOSITION CONSISTING ESSENTIALLY OF: FROM APPROXIMATELY 55 PARTS TO APPROXIMATELY 85 PARTS BY WEIGHT OF LEAD SILICATE GLASS, FROM APPROXIMATELY 6 TO APPROXIMATELY 20 PARTS BY WEIGHT OF ALUMINUM, SAID LEAD-SILICATE GLASS AND ALUMINUM BEING IN A WEIGHT RATIO OF AT LEAST ABOUT 55 TO 6, AND FROM APPROXIMATELY 10 TO APPROXIMATELY 40 PARTS BY WEIGHT OF METAL PARTICLES WETTED BY LEAD AND NOT APPRECIABLY OXIDIZED BY THE LEAD OXIDE OF THE GLASS AT SAID FIRING TEMPERATURE, THE INGREDIENTS BEING PROPORTIONED AND COMBINED TO PRODUCE A GLASSY MATERIAL HAVING AN ELECTRICALLY CONDUCTIVE PHASE OF LEAD DEPOSITED IN SITU AND RESTRAINED AGAINST MIGRATING FROM THE SEAL MATERIAL BY THE WETTED AND NONOXIDIZED METAL PARTICLES.
References Cited (Backward Citations)
US2106578A
Cited
US2267571A
Cited
US2416480A
Cited
US2415036A
Cited
US2890964A
Cited
US3037140A
Cited
US3080328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |