Patent US2552344A successfully refreshed from Google Patents.
US2552344A
Expired / Lapsed
US
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Spark plug cleaning and testing unit
Assignee: OILJAK Manufacturing CO Inc
•
Filing: 1950-03-30
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Granted: 1951-05-08
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Expires: 1970-03-30
Abstract
No abstract record available.
Inventors
- 👤 Jr George Persak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:56
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1537902A
Cited
US1359016A
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US2009589A
Cited
US2118139A
Cited
US2290629A
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US2505422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |