Patent US2846820A successfully refreshed from Google Patents.
US2846820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug cleaner
Assignee: OILJAK Manufacturing CO Inc
•
Filing: 1956-05-28
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Granted: 1958-08-12
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jr George Persak
- 👤 James F Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:58
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/32; B24C3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001886A
Cited
US2001887A
Cited
US2222518A
Cited
US2277911A
Cited
US2554858A
Cited
US2552344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |