US3239710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug with thread cleaning notch
Assignee: Individual
•
Filing: 1963-06-28
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Granted: 1966-03-08
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Toporzysek Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:13
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
AN IMPROVED SPARK PLUG HAVING A METALLIC BODY WITH A WRENCH ACCOMMODATING PORTION AND AN EXTERNALLY SCREW THREADED END FOR MOUNTING IN THE CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE, CHARACTERIZED BY THE FACT THAT THE OUTERMOST FULL EXTERNAL THREAD AT THE END OF SAID BODY MEMBER IS PROVIDED WITH AN IN INCLINED THREAD INTERRUPTING NOTCH FOR WIPING CARBON DEPOSITS FROM THE INTERNAL SCREW THREADS OF A CYLINDER HEAD AS THE SPARK PLUG IS BEING MOUNTED OR INITIALLY TURNED FOR REMOVAL OF BURNED CARBON DEPOSITS.
Claim 2
Dependent Claim
85 words
AN IMPROVED SPARK PLUG HAVING A METALLIC BODY WITH A WRENCH ACCOMMODATING PORTION AND AN EXTERNALLY SCREW THREADED END FOR MOUNTING IN THE CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE, CHARACTERIZED BY THE FACT THAT THE OUTERMOST FULL EXTERNAL THREAD AT THE END OF SAID BODY MEMBER IS PROVIDED WITH AN IN INCLINED THREAD INTERRUPTING NOTCH FOR WIPING CARBON DEPOSITS FROM THE INTERNAL SCREW THREADS OF A CYLINDER HEAD AS THE SPARK PLUG IS BEING MOUNTED OR INITIALLY TURNED FOR REMOVAL OF BURNED CARBON DEPOSITS.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |