US2686501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition speed cutout for internal-combustion percussion tools
Assignee: Syntron Co
•
Filing: 1950-10-25
•
Granted: 1954-08-17
•
Expires: 1970-10-25
Abstract
No abstract record available.
Inventors
- 👤 Neville C Mckelvy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:01
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US970794A
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US1390376A
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US1764055A
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US1722117A
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GB298641A
Cited
US2152287A
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US2551988A
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US2480879A
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US2522550A
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US2616682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |