US3119944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug electrode
Assignee: Federal Mogul Ignition LLC
•
Filing: 1961-07-25
•
Granted: 1964-01-28
•
Expires: 1981-07-25
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Lentz
- 👤 Frank A Westenkirchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:20
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A CENTRAL ELECTRODE FOR A SPARK PLUG, SAID ELECTRODE COMPRISING A ROD HAVING A CORE OF MATERIAL OF HIGH HEAT CONDUCTIVITY AND A SHEATH OF A MATERIAL RESISTANT TO EROSION AND CORROSION, A RECESS IN AN END OF SAID ROD, AND A BRAZING MATERIAL HAVING A CORROSION RESISTANCE APPROXIMATELY THAT OF SAID SHEATH IN SAID RECESS WITH THE PORTION OF THE BRAZING MATERIAL EXPOSED AT THE END OF SAID ROD BEING FLUSH WITH SAID END AND WITH AN UPPER PART OF SAID BRAZING MATERIAL INTIMATELY BONDED TO SAID CORE.
Claim 2
Dependent Claim
89 words
A CENTRAL ELECTRODE FOR A SPARK PLUG, SAID ELECTRODE COMPRISING A ROD HAVING A CORE OF MATERIAL OF HIGH HEAT CONDUCTIVITY AND A SHEATH OF A MATERIAL RESISTANT TO EROSION AND CORROSION, A RECESS IN AN END OF SAID ROD, AND A BRAZING MATERIAL HAVING A CORROSION RESISTANCE APPROXIMATELY THAT OF SAID SHEATH IN SAID RECESS WITH THE PORTION OF THE BRAZING MATERIAL EXPOSED AT THE END OF SAID ROD BEING FLUSH WITH SAID END AND WITH AN UPPER PART OF SAID BRAZING MATERIAL INTIMATELY BONDED TO SAID CORE.
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |